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YK86
09-07-2002, 11:03 PM
Please post any questions or comments you may have about the thread "Project B20A" (near the top of this section) here.

gr3k0sLaV
09-07-2002, 11:30 PM
are you putting in a b-series wiring harness or are you keeping the existing ECU & harness and going the route of the TEG distributor and or b16a Intake manifold?

YK86
09-07-2002, 11:40 PM
I haven't decided yet but as of right now, I will be using the 86 USDM A20A3 manifold and harness (harness for sure), JDM B20A distributor, crank angle sensor, USDM 88-91 2.0SI ignitor (same as the B20A ingnitor), and 86/87 JDM B20A ECU.

anchovies
09-07-2002, 11:45 PM
Are you putting it on the 86 or 88 =)?

YK86
09-08-2002, 12:55 AM
The 86!

RCracer
09-08-2002, 01:41 AM
How many miles has the engine got on it?
How did you get the crankshaft pulley off witout the engine being in a car? I have tried to undo the crankshaft pulley bolt on mine and it is tight. I can get the flywheel off but cant seem to jam the crank (without fear of breaking the block) to get the pulley off.

YK86
09-08-2002, 01:51 AM
I'm not 100% sure about the mileage but that importer usually brings in engines ranging from 20,000kms to 90,000kms just so he can say "It's under 100,000 kms". Worst case scenario, it's 90,000kms which is about 56,250miles. Considering Japan is hard on inspections and stuff, I'm sure it's not in too bad a shape. I am pulling the head off hopefully tommorrow so I can get a good look at the internals then.

As for the crank pulley, I bought one of the best tools a month ago! It's a chain style strap wrench which wraps around round objects and you clamp it tight just like a vise grip (made by the same company that makes vise grips). That thing grabs it VERY tight. I use a pipe on the end of it to hold the crank pulley while I use a long breaker bar with 17mm impact socket to break it loose. I also use the strap wrench to get the crank bolt loose when changing the timing belt in a car. It costs about $20 and is very much worth it! I can post a pic if you like.

RCracer
09-08-2002, 02:05 AM
That sounds like a beefy version of the chain wrench I use to remove oil filters etc. Not to sure my chain wrench will be up to that.
I am going to take the head off my engine soon (it has 141,000 miles on it) and may need some head parts (which I cant get at the moment). I can get pistons etc (all at a price) but had no luck in locating top end parts other than from honda (bloody expensive in the UK)
Do you have the torque setings for the bolts on the engine?
The only referancve I have to the DOHC engine is in the Chilterns prelude/accord manual. Do those engines have to same bolt tightness as our engines?
Can't get a honda manual on the B20a due to cost. Honda want £150 for their Workshop manuals(per section).
They told me it would cost me about £400-£550++ to get all the 3rd Gen accord manual. (so I downloaded it from Paul Aerodecks Site:cool: )

YK86
09-08-2002, 03:53 AM
What kind of head parts? Like head gasket and seals and stuff?? As for torque specs, I am going to base mine on the B20A5 Prelude motor (I have the factory service manual). If you want to compare numbers, let me know and I will look them up. I'll give you a number now so you can compare: cylinder head bolts tighten to 22 ft-lbs first in the proper order/sequence and then in the same sequence, tighten to 49 ft-lbs.

carotman
09-08-2002, 04:40 AM
Sweet Yasu, As soon as I make some space in My garage, I'll put my motor onthe bench too.

YOu'll have to get the B20A P/S pump tough, it's not the same as the B20A..... The alternator seems to be fine tough.

YK86
09-08-2002, 05:01 AM
No worries! Mike gave me one with the proper bracket.

RobT5580
09-08-2002, 07:47 AM
Thats nice Yasu, i was hoping to see that engine that mike had but that fell through. Its too bad he had to part it out like that. If i were you i would have taken the whole thing so you have all new parts just in case you have any problems. Good Luck

YK86
09-08-2002, 10:07 AM
We actually pretty much stripped the whole block including the water pump and oil pump so there's not much left except the block itself, the pistons and rings, rods, crank, bearings, etc and I won't be needing those. A 3rd gen Lude guys is supposed to be coming to pick up the rest from Washington.

RobT5580
09-08-2002, 04:53 PM
Good so you have some spare parts. That was one nice motor that mike built. But it went to a good home so cant wait to see how it turns out for you....That was one bad thing about the B20A is getting parts because their are still many that cant be sourced from other honda motors. If i did get the motor i was gonna stock up and have some spares imported for me. The sad thing is i wanted to run turbo so it was perfect for my purpose but their is a slight possibility of a B20A. I cant make up my mind i want a turbo but it all has pros and cons no matter what i do. A20 Turbo, B20 Turbo or B16A Turbo. My cheapest bet is the A20 but if i front the extra money for a B16 i have a motor that is easier to part with if need be or use in another honda.

YK86
09-08-2002, 09:37 PM
Have you thought about B20A turbo's stock B20A set, and the Ludespeed kit Mike sold him?? I know the tough part for Mike was that he is quite busy and didn't have the time to look into shipping something huge like the engine and tranny.

gr3k0sLaV
09-09-2002, 05:43 AM
What parts off the A20 can be used in the b20a?

how much different are the water pumps, oil pumps, etc.

Wonder if pumps and stuff off other car would fit.

YK86
09-09-2002, 10:27 AM
Not very much can be used. The only thing I will be using is the intake manifold or at the very least the JG throttlebody and the alternator. I will have a better list soon.

89SE-ICoupe
09-09-2002, 12:42 PM
Do many parts from the USDM B20A5( water pump, oil pump, head gasket, and various seals etc.) work with the JDM B20A? Do you basically have to raid the 88'-91 Prelude parts bin to to complete the conversion? Will the original A/C work with your new set up? That is important to me because I live in Texas!

YK86
09-09-2002, 02:38 PM
I don't have A/C so I'm not sure. I will look up the part numbers when I have time. Which compressor do you have?? I'm looking up Prelude part numbers but alot of them are slightly different from the JDM B20A.

carotman
09-09-2002, 04:15 PM
Ok, here is what I found regardingthe B20A5 and B20A parts

The Pistons/rings/rods are the same
The exhaust manifold upper part is the same.

All the other part numbers do not match.

This doesn't mean they will not fit tough. The distributor and crank sensor from the B20A5 will bolt to the B20A.. It's just that it uses a different system.

RobT5580
09-09-2002, 04:40 PM
Yasu, I thought about it but put the money in other things i needed. But i really wanted Mikes because it was all new and built for turbo which i wanted anyway. My major gripe about the B20A was parts and with Mikes engine i would have been ok until i could import spares. I really like the B20A because its a nice clean fit and its proper and as a big big fan of our style accords it would be perfect to open the hood with the original (Rare) motor. Not many know about it and the torque is rather impressive to me. We will see i have time before i do a swap but im leaning towards Place Racing because of the resourses available for other B-series.

YK86
09-09-2002, 06:10 PM
Yeah, if you can afford it, that would be the way to go! I know for sure I am not interested in going turbo or nitrous so I had to have a stock block. I have relatives in Japan but considering they don't normally fix their own cars, I'm not even sure they can or know where to order parts for me. I'll be okay for now EXCEPT the clutch release bearing.

MoonScryer
09-10-2002, 02:17 PM
Yasu: talk to carotman about getting you the part number for the release bearing. He has the JDM parts catalog. I'd get it to ya, but I forgot how to work the thing to bring up the part numbers :D

YK86
09-10-2002, 05:02 PM
Thanks for the offer but I have the catalogue from Carot! I've been using it every chance I get to get all part numbers from a bunch of things. I also have a USDM Accord parts list but it doesn't list everything. I found a release bearing though after doing alot of searching and comparing at the local Honda/Acura parts department and the local auto store.

carotman
09-10-2002, 05:15 PM
And from what car is that bearing from????

MoonScryer
09-11-2002, 04:35 AM
90-93 Acura Integra. This swap is looking more possible...even for a limited budget like me :D

carotman
09-11-2002, 04:53 AM
Yup, that's true.

The only problem is still the damned transmission

89SE-ICoupe
09-12-2002, 04:41 AM
YK86, I have a kehlin A/C compressor.

YK86
09-12-2002, 09:44 AM
I will look up the part numbers and see if they match for you.

syn4la5
09-12-2002, 04:53 PM
how much would a good b20a engine cost and the diffuculty level installing one (may get one when my engine bites the dust lol)

YK86
09-13-2002, 02:23 AM
Roughly $1500. As soon as I finish my swap, I will look into working on the one SPI Tuning has so who ever buys it gets a real drop in and plug in B20A with all neccessary parts included. It'll be a 86/87 style though.

CARBurn
09-22-2002, 12:05 PM
Wow, I have been away for a while...I didn't know this was posted. I'm glad you posted this JDM B20a guide, Yasu, this will really help some of us that are interested in finding and dropping in that "rare" wonderful motor.

Question: If you don't mind me asking, how did you, carotman, and moonscryer1, get a JDM parts catalogue?

YK86
09-22-2002, 12:42 PM
I got my catalogue courtesy of Carotman.

CARBurn
09-22-2002, 12:59 PM
Is is like a "book catalogue" or some thing? The way Moonscryer mentions it in his post it seems like some computer software program that matches part numbers for you?

carotman
09-22-2002, 05:19 PM
it'S a computer program.... pain in the ass to use (since I don't read japanese, don't have a japanese windows and thus can't even display the proper font......)

Other than that it's been very useful to me.

CARBurn
09-22-2002, 05:35 PM
oh, didn't there was a computer program for parts. How nice...

Site
09-24-2002, 05:08 AM
Man, your swap project is looking so impressive thus far. You're really taking the time to get the details right - port matching the intake manifold, adjustable cam gears, etc. I'm glad to see that you're willing to put $ and time into making this swap as effective as possible. I believe your car will be a great example of what a N/A B20A has the potential to do in our cars!

YK86
09-24-2002, 08:12 AM
Thanks! I really appreciate the compliment!

damackz
09-24-2002, 09:26 AM
:werd: good job yasu it really looks like its coming along!!!! :pimp:

carotman
09-24-2002, 10:58 AM
That looks damn good Yasu!

I did find a 128 teeth belt if you want it.

YK86
09-24-2002, 11:22 AM
Really?? What is it (brand and part number)??????

pric
09-24-2002, 05:55 PM
awsome job on your project Yasu!! you are doing a great job on keeping us updated. I know that the ratio is the same with the smaller cam gears do you think it will affect the power output any?

YK86
09-24-2002, 07:15 PM
Good point on the cam gear sizing but I don't think it will affect anything (positive or negative). It is something I won't know until I run it I guess. But I have found a local place that is known for doing a good job dyno tuning so I am hoping they will be able to help me fine tune everything and I can get a print out on the power it's producing. After running the car a bit, I'm going to get the cams ground and then I will try and get them to do their thing. I'm also looking for a DC header for a 2.0SI but I really don't have the cash to even buy a used one unless it's like $100 so I guess I'll have to stick with the stock B20 manifold and A20 DC downpipe.

AZmike
09-24-2002, 07:30 PM
Running those smaller timing gears will only cause a slightly higher tension on your timing belt's drive side than the original B20A configuration. Since the gears have a slightly smaller radius it will take a slightly larger force to get the same torque out of them to turn your cams. I wouldn't worry about it.

Justanothermike
09-24-2002, 09:56 PM
i've been trying to keep up with YK's swap but i think i might have missed why he changed the B20a5 gears. Just wondering because we've found a belt that is compatible with the JDM engine. NISSAN MAXIMA:D

YK86
09-25-2002, 12:10 AM
Thanks! You just confirmed it for me! I was talking to Carot about it I think and a belt I found with 133 teeth (Dayco 95104 or Gates T104) was cross referenced to a late 80's early 90's Nissans (Maximas, Pathfinders, 300ZX, etc) but I never got around to checking it since the two auto stores didn't have it in stock. Plus it's a hair wider than 24mm. I actually have or can get everything I need to stay JDM (new water pump, timing belt, custom CNC adjustable cam gears) which I got from Mike Lee but I thought I'd see if I could solve the problem of parts avalability since alot of guys are worried about not being able to order key JDM parts if they bought a B20A. So other than that, I really had no reason to do the conversion.

carotman
09-25-2002, 04:44 AM
plus, you can get adjustable camgears with the B20A5 parts...

Vanilla Sky
09-29-2002, 08:29 PM
the a20 intake manifold works, right???... do any of the other b-series iintake manifolds work?? if they do on the b20a, would it carry to the a20a?

Derick

gr3k0sLaV
09-29-2002, 09:09 PM
b16a manifold
i forget which one in particular

YK86
09-29-2002, 09:38 PM
I think it needs to be slightly modified. Justanothermike's the one to ask about that.

Justanothermike
09-30-2002, 05:08 PM
Originally posted by carotman
plus, you can get adjustable camgears with the B20A5 parts...

If i'm not mistaken the early F motor cam gears are the same as the JDM B20 gears. Like wise with the ZC gears and the Dseries cam gears.

YK86
09-30-2002, 08:06 PM
On my trips to the junkyard, one of the things I did was to compare cam gears. The early Civic/CRX motors had the right size and number of teeth but it stuck out more than the B20A which is why I though it wouldn't work. Not sure about the ZC or F gears since no one had them in stock. I do know that Mike went to a performance store (1 1/2 ago??) and every adjustable cam gear they had at the time wouldn't work. They may have come out with more applications after that though.

Justanothermike
09-30-2002, 10:13 PM
Originally posted by Justanothermike


If i'm not mistaken the early F motor cam gears are the same as the JDM B20 gears. Like wise with the ZC gears and the Dseries cam gears.

wut i ment by ZC gears is that its compatible with the newer Dseries gears. and the B20 gears should be the same as the Fmotors

YK86
09-30-2002, 10:33 PM
Oh, okay. BTW, did you see my PM yet?? Don't know if you ever check that so I thought I'd ask.

2Fast_Fiero
11-28-2002, 03:37 PM
I've been seriously thinking about buying a JDM B20 and doing what your doing....but a lil different. I just want to get one that runs, with low mileage and spend a few months on it...just building it up to being practicly brand new. I've had some questions tho. Do you, or anyone know if the B20/B21 Vtec swap for the 3rd Gen Prelude's will work on a JDM B20 with the same amout of Difficulty? And does anyone know if the Ludespeed Turbo Kit will also bolt onto the JDM B20? Another question is.....Yasu, when you first started out...you said you bought the entire stock motor for 200 bucks......can you confirm this? I need a price range of how much I will be spending for a stock JDM B20 Motor, Without the mods you've done to it..Just a stock one. I dont want to drop this into the Sedan, I want to wait until I get a coupe because I got my money back on the Sedan and I am helpin my brother get it fixed so we can have 2 3Geez in the family. Thx.

YK86
11-28-2002, 03:52 PM
The motor was $200US cash no warranty. But the guys who have found some on their own usually seem to pay about $350US (no ecu, tranny, etc). Now if you were to find a place with a full swap in kit (or buy the parts individually) with the ECU, rear mount, 5 speed tranny, etc, you should plan on spending around $1200. You would still have to do the wiring and buy an external ignitor and stuff. Even though the engines aren't as hard to find now, and solving the ECU problem by using a USDM Lude ECU, you will still have to find a 5 speed tranny which is probably the toughest thing to do.

As for the Ludespeed kit, you need to modifiy it to make it fit. the piping is too sort, the downpipe is bent at the wrong angle, and so on. About the head, do you mean a vtec head swap?? If so, I don't think it'll work but you may want to compare head gaskets if you are really into the idea. Even Tom at Ludespeed gave up since he was dissapointed with the results and there is no reason to think our B20's would be any different.

2Fast_Fiero
11-28-2002, 04:39 PM
He gave up because it was too difficult, and that the results weren't that impressive. I haven't seen the results tho...I've been wanting to talk to him about it...... Atleast thats what was said on Ludespeed about it. So your sayin I'll have to find a USDM 5spd tranny? If thats the deal, it wont be a problem because there are alot of 3rd Gen Lude Si's at the junk yard.

YK86
11-28-2002, 04:44 PM
No the USDM 5 speed doesn't fit. It's actually totally different. That's what makes it so hard to find a 5 speed for the B20A. Even SPI Tuning who had a bunch of them a coupe years ago can no longer find ANY (and they don't have any more available).

carotman
01-05-2003, 01:03 PM
any updates?

YK86
01-05-2003, 02:11 PM
About the only update I can give you is the motor has collect an inch of dust just sitting there LOL. It sucks it's too cold and wet to do anything.

carotman
01-05-2003, 05:35 PM
I can only feel your pain :)

b20a86lude
01-16-2003, 05:06 AM
where did you find theseJDM B20A distributor, crank angle sensor

b20a86lude
01-16-2003, 05:30 AM
where are you finding the b20a for 350 dolllars im paying 950 for transmisson and engine please someone find me or telll me where to get one for 350 please

RobT5580
01-16-2003, 07:59 AM
He bought just the long block for that price and i know u can still find a long block but its not worth the trouble to piece the motor together. Yasu had a friend that has a complete setup so he has everything he needs now. If you plan on doing this swap cheap then dont bother cause its not gonna be cheap unless you know people and if you did you wouldnt be asking where to get them.

b20a86lude
01-21-2003, 06:07 AM
some one tell me everyhting i need to make the b20 work what exactly do i need what do i need if i want to keep the b2o jdm intake manifold and then what do i need if i wnt o keep the a20 manifold and which ecu do need if i use the a20a manifold and tell me the wires and i dont want yall to say look in the post its all there and i dont want to look for all the info and put it toghter its to hard just tell me right here

b20a86lude
01-21-2003, 06:07 AM
some one tell me everyhting i need to make the b20 work what exactly do i need what do i need if i want to keep the b2o jdm intake manifold and then what do i need if i wnt o keep the a20 manifold and which ecu do need if i use the a20a manifold and tell me the wires and i dont want yall to say look in the post its all there and i dont want to look for all the info and put it toghter its to hard just tell me right here:super:

carotman
01-21-2003, 06:15 AM
you keep the wires from your stock engine and ECU then you slam a TEG 86-87 distributor and cranksensor. That's all you need to make it work. You can use the B20 or A20 Manifold since they are the same for your Year.

maka_RTH
01-21-2003, 06:13 PM
it's also in the faq: http://www.3geez.com/showthread.php?s=&threadid=86

88LXI
01-21-2003, 08:53 PM
yk86- do you need the rear mounting bracket? i was gonna order one for that b20a86lude guy... i havent seen in any of your threads where you have procured one

88LXI
01-21-2003, 09:02 PM
heres what i paid to get mine put in... but i didnt rebuild... i figure if it blows up ill just get another LOL it was too cheap

375 engine w/ tranny
100 timing belt and rear trans mount
50 drivers side axle repair
20 integra dist and angle sensor
75 misc engine supplies
and about 15 hours labor

http://images.cardomain.com/installs/268000-268999/268775_25_full.jpg


Install Pictures (http://www.cardomain.com/member_pages/view_page.pl?page_id=268775&page=4)

YK86
01-22-2003, 01:26 AM
I have everything I need. I picked up an extra rear mount though when I was in Japan but I'm waiting for it to get shipped so if someone needs it, I might have one in a month or so.

On a side note, I just picked up a B20A5 Airmass header so now I am all set. I haven't compared yet but I am hoping the DC A20 downpipe will bolt up to the top half of the Airmass.

RobT5580
01-22-2003, 08:36 AM
I would be surprised if they match up right. I just did an airmass on my brothers 90-93 teg and they are not bad. But i just did a DC on my freinds H22 the other day the piping was off a tad bit from DC and on bolt was very very difficult to line up and get it on. But good luck with it Yasu.

b20a86lude
02-03-2003, 11:14 AM
88LXI please tell me wear you got your b20a and rear transmisson mount help ,me

BOLINKXR-89LXI
02-06-2003, 08:47 PM
:) I got my b20a from a place in CA for $275 with a auto and found a five speed at a nother shop for $80:smokin:

lude4ever
02-16-2003, 01:35 AM
Just a quick question (or two), since most of the engine importers just sell long blocks, is it possible to use a USDM intake manifold? and also, will a DC sports or another header made for the B20A5 fit to the JDM B20A?

Thanks

YK86
02-16-2003, 02:16 AM
You can use a USDM A20A manifold. The B20A5 header will fit but you need to get the downpipe customized to angle properly since the B20A5 tilts back while the JDM B20A tilts forward. BTW, I noticed you have a 3rd gen Lude but the B20A we are talking about not the same one as the JDM B20A that fits the 3rd gen Lude.

lude4ever
02-16-2003, 02:57 AM
Oh, How different is are the two motors, will it not mount in directly?

Thanks though, for that info

YK86
02-16-2003, 03:08 AM
The one I have will not mount in your car. The one you want is the JDM B20A that tilts back and has 145HP. Do you ever visit www.vancouverpreludeclub.com at all? A couple guys there (in the 2nd/3rd gen section) have the B20A you are after so they can show you pics and stuff.

merlindavis
02-16-2003, 07:55 AM
i honestly think there's less than ten of us currently there that have that swap... i'm taking pictures for a seperate reason in a few hours anyways, i'll grab some engine pics for ya...

here's a pic of ludeaddict's jdm b20a, with his stupidly shiny valve cover...
http://www.inline4.com/mike/myengshiny.jpg

lude4ever
02-16-2003, 12:10 PM
Thanks a lot for the help YK86, I will talk to them

BOLINKXR-89LXI
02-18-2003, 10:17 PM
its under engine swap for b20a in a cupe

I'm not a fan of the four door but I do like the coupes and the hatch. I put a 2.0SI on the back of my hatch now that the b20a is in.

http://www.3geez.kicks-ass.net/t/B20A8.jpg

http://www.3geez.kicks-ass.net/t/B20A9.jpg

AvgWhtMale
02-19-2003, 09:49 PM
Diggity-bomb. Where'd you get the emblem from?

turntune
03-16-2003, 12:15 PM
can anyone give a clear explaination between the B20A and the B20A5...an how much does either differ from the other B's...Is it possible to run a B18A head, intake, ecu on either B20A's?.....how much other B-series parts work on the B20A's?...trannys?....looking to mount into a EG sedan....

NXRacer
06-13-2003, 01:43 PM
So the B16 intake manifold will work on the B20a. If i decide to go that way, i'm thinking of getting a new fuel rail and bigger injectors. I heard that we need to get peak and hold injectors. What a good size? I"m gonna get forged pistons so i can run N2O. Should i get bigger injectors?

Also, what pistons are you gonna use? I heard integra type r's will work, or the b20a5 will work as well.

skiingco
09-12-2003, 06:38 PM
I also sent a email. I have a B20A and need the rebuild kit, alternator and pwr steering. Where did you get your parts?
Chris

BOLINKXR-89LXI
09-12-2003, 06:56 PM
yk86 I need help I want to use the b20a5 ecu on my b20a for some reson my car is getting relly relly bad gas milage with my a20a ecu the car is running way to rich and I think it has something to do with the ecu I got the car dynod and it said 135hp to the wheels I expeted more I think it a ecu problum what do you think

RobT5580
09-12-2003, 08:31 PM
I just spoke to Darryl@Openloopmotorsports and they just switched to the B20A5 ECU recently and he said it definately improved power but it has a drawback. I didnt totally understand it but he said they had to switch speed sensors so the ECU didnt throw a code. He said they used the preluded speed sensor so they dont have a code but the speedometer is not working. I didnt totally understand why but they knew it was gonna happen. My only logic is the B20A5 sensor is electronic but i think im way off on this one. I know the A20A spedo is cable driven so he lost me on why the spedo stopped working. Im sure they can help you out if you want.

But on the other hand i talked to the guy in Georgia from Accuformance a long time ago and he said he was running something like a AFC to get his working optimal. He had his B20A for some time and he told me he could get the discontinued APEX unit but this was probably a year ago. I dont remember the exact APEX name but it was basically an air/fuel controller so that would explain a lot.

racerxh23
09-13-2003, 06:11 AM
You stated that the mounts for your b20 are totally different from the 88-91 Preludes. Are the mount locations on the engine and transmition different as well?

Also, where does the extra 20hp over the 88-91's come from? The descriptions of both engines are identical on honda.jp's site.

L3G10N
09-13-2003, 01:46 PM
yes the mount location are different.

majority of the website don't even know about the b20a accord. they think that the b20a accord are the same than the b20a prelude.

racerxh23
09-13-2003, 03:05 PM
The only info I found was on Honda Japans official site and it wasn't very helpfull. Do you know any of the specs that could help me find the differences between the two? I need stuff like piston compression height, head code, valve diamiters, stock tb size, rod lenghts, anything.

Thanks

L3G10N
09-13-2003, 05:46 PM
L3G10N's cardomain page (http://www.cardomain.com/member_pages/view_page.pl?page_id=396433&page=1)

look at this link, you'll get the specs of the 86-89 b20a ACCORD, not lude. i'll try to find you the spec of the b20a PRELUDE

racerxh23
09-13-2003, 10:24 PM
Disregard. I believe this is the same b20 88-91 Prelude owners have installed since it has the same 145hp rating. Thanks for your help!

skiingco
09-14-2003, 05:58 AM
yk86 or robT5580, where can I get rebuild parts for my B20A
Chris

RobT5580
09-14-2003, 08:13 AM
If you do a little reading in this forum it has all the major part numbers and one place in Japan you can order direct from. I have a post i believe still at the top of this first page that gives you all the details. But i still recommend reading all the B20A topics because their are some parts you can use from other applications.

L3G10N
09-14-2003, 02:18 PM
Originally posted by racerxh23
Disregard. I believe this is the same b20 88-91 Prelude owners have installed since it has the same 145hp rating. Thanks for your help!

this one are the 160hp.

racerxh23
09-14-2003, 03:08 PM
I realized that I used the wrong conversion. According to Honda Japans site, the engine is 160ps which ends up being about 155hp. Does that sound about right?

I'd still apreciate any of the specs I asked about before. Looking at the 88-91 Prelude Helms, hondaautomotiveparts.com pics, and the pics here I knoticed two things. The first is that the mount bracket bolt hole locations look to be identical on both engines. Tho I can't tell about the one on the top of the tranny. The second is that the bolt pattern for where the tranny mounts to the block are totally different. Oddly enough however, the bolt locations for the rear mount on the back of the tranny also look identical to the Preludes b20.

What do you think of all this?

L3G10N
09-14-2003, 04:32 PM
stop asking, i have a b20a Accord and i've checked the b20a prelude, side by side. THEY ARE NOT COMPATIBLE. The mount are not the same!

racerxh23
09-15-2003, 02:57 PM
What differences did you notice between the two?

L3G10N
09-15-2003, 04:19 PM
Damn! just read this post, everything's already explained there!

What newby should read before asking anything! DO YOUR HOMEWORK! (http://www.3geez.com/showthread.php?s=&threadid=86)

difference is that i've checked by myself and everything explained in this post is REAL and TRUE!

racerxh23
09-15-2003, 05:44 PM
I've already read that and your other post about the engine and searched other sites including Honda Japans. I guess the diff is in the head but what. Cam profiles, valve diamiter, port design. Either that or Honda fuged the hp ratings. Sorry to annoy you. Thanks for your help.

L3G10N
09-15-2003, 06:44 PM
don'T be sorry, you don't annoy me. it's just that, yeah they are different but what is different in the engine, i don'T know. But anyway, if you have a lude 88+ and you're looking to put the b20a accord in your lude, stop asking 'cause it won'T fit! but if you have a lude 85-87 it will fit, so you can ask other question.

racerxh23
09-15-2003, 07:18 PM
I'm trying to understand everything about the engine. I thought the 88-91 Luders have been using your b20 due to the importers saying that the Prelude JDM b20 was 145hp when its actually less. The b20 is truly the bastard b. If you find anything else about the 160ps b20 please post them. I very curious about it now.

Do you know of any 160ps b20s near TN? I'd like to take a closer look at one.

L3G10N
09-15-2003, 10:27 PM
come in quebec :)

Versanick
09-16-2003, 01:47 PM
You fellas are out of control, lol.

For starters, I want to re-pose a question I've already done my homework on ten times, and can't find.

WILL the b20a5 (88-91 prelud si?) head gasket fit on my 86-87 accord b20a?

To answer someone else' question about pistons, they should buy pistons for that prelude motor, they are both 81mm bore, the bottom end is probably exactly the same (in reality it is, whether the part #'s concur)... just ask them for pistons for the prelude b20a5.

I still have to find a head gasket, b/c I just smacked a bunch of valves b/c my timing belt jumped a tooth (it's the 133 tooth one).... and YES, the gator belt works, I'll post the part # as soon as I get to look back at the box, it's 31/32" instead of 24mm, and it's exactly the same size... but my old one was so loose from sitting for two years that it was exhaused and jumped a tooth @ 6800rpm. So I have to get some valve work done b/c the timing jumped off about 13 degrees.

Anyway... back to the head gasket thing. Does anyone either know where I can get one quickly or does someone have one? http://www.importechparts.com/hondalist.html has a lot of head gasket kits for 133.25, just not our part # (the one with PH3 in the middle) Or just as well, will the b20a5 one work?

thanks

paul

RobT5580
09-16-2003, 01:59 PM
If i remember right only the JDM one will work. But it shouldnt be a problem cause their is a company in Japan that will ship within one week (so im told). Someone did mention that they had a copper one made and the company now will sell them to other B20A people. So if u need it really bad i think my old post about importing the parts is still at the top of this forum.

Oh and prelude pistons work but u have to use the prelude rods because Mike Lee had to pick up prelude rods because the B20A ones didnt fit.

Versanick
09-16-2003, 03:52 PM
And how about valves...

I'm finding valves online at ebay, for h22's, f22's, d16's etc... I thought the valves and whatnot were mostly the same as other DOHC honda motors.

Will valves work for an f22? a b16? a b18 at least?

Buying race valves on e-bay may be cheaper than finding stock ones...

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2432457106&category=33617 is a set for a d16 I think... how much different are the valves? I assume ones from f and d series might not work, and if not, do the b18 ones work? are they the same, at least non-VTEC? This set says it works for b16 b18 b20 h22 and d series, which makes me think they're all the same... http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2432602640&category=33621

if they're the same like I'm thinking, I can assume that I could buy the $135 ones, no problem...

Let me know if anyone knows, or if you guys know anyone who would know...

thanks a ton, you guys are a big help

peace,
paul

Versanick
09-16-2003, 09:49 PM
Here are some specs on the other valves I looked up (but I can't find any specs on the b20a5 or our b20a's if it's the same!)


on ebay:

b18 94-2001 1.8 or 1.6 VTEC 94-2000:

intake is 34mm head diameter
5.5mm stem diameter
102.35 overall length

exhaust is 29mm head diameter
5.5mm stem diameter
102.55mm overall length

other ones (like the first ones) are 1mm oversize head, but these next ones are made for the h22a:

intake is 36mm head diameter
5.5mm stem diameter
106.85 overall length

exhaust is 31mm head diameter
5.5mm stem
107.1 overall length

ground the seats slightly, 1mm oversize head


the f22 ones I found are much longer length

for the maddog racing
intake is 34.5mm head diameter (.5mm bigger)
5.5mm stem
112mm overall length

exhaust is 29.5mm head diameter (.5mm bigger)
5.5mm stem
123.5mm length

I think the head diameters just need to be matched, along with the lengths.

the d16 ones say they're 31mm head diameter on intake, and 27mm on exhaust, but it just says 'stock length' and doesn't tell me what the length should be....

Does anyone know what the stock length is on our b20a's, or any means of finding out? These race valves are cheap, and if the h22 or d16 or b18 ones are a match, that would be tits.

BTW, anyone that can find out, if you can find out as fast as possible, because my head is now officially apart (yes, all 16 valves are bent, yuck).... and I need to get valves shipped out real soon...


thanks ahead of time guys,
you're tha bomb
peace
paul

RobT5580
09-17-2003, 12:45 PM
I dont know about the valves yet. My machine shop is gonna look into it if i dont have any by that time. But i would think there has to be some that fit. Im gonna get new springs as well so i may have JG Engine Dynamics make them if its a problem. But i would imagine they would find some that fit.

racerxh23
09-17-2003, 08:15 PM
Versanick: Can you tell me what the valve diamiters are since you got the head apart?

Versanick
09-17-2003, 09:57 PM
I may be able to tell you after I take it to the machine shop, tomorrow we're going to get the head checked out and resurfaced, there's a burn mark on it where my head gasket blew a 1/2" hole between cylinders 2 and 3 (I've never seen anything like it, it's just a missing chunk)...

I'll see if I can have him measure it (b/c IDK how accurate I'd get w/a ruler)...

I need gaskets though. No one has answered any questions as to whether the b20a5 gaskets fit.

I need a new head gasket, valve gasket set, valve cover gasket, intake and exhaust gaskets, and cam seals. And I need them right now (so I can put my car together!) It's my daily driver after all!

Does anyone have any?! I asked Yasu, but he hasn't replied yet! Anyone interested and have any quantity of that stuff, and can ship overnight? please?!

thanks
paul

RobT5580
09-18-2003, 05:46 AM
I answered it. I believe only the JDM B20A headgasket will work. And for valve seals i heard B20A5 ones will work and a old teg valve cover seal will work. Dont know about the cam seals. But you can get a head gasket from Japan within a week from what the company has told me. For some reason i cant find my old post so go to the one at the top of this forum and i posted how to get the parts from japan.

carotman
09-18-2003, 05:01 PM
Originally posted by RobT5580
I just spoke to Darryl@Openloopmotorsports and they just switched to the B20A5 ECU recently and he said it definately improved power but it has a drawback. I didnt totally understand it but he said they had to switch speed sensors so the ECU didnt throw a code. He said they used the preluded speed sensor so they dont have a code but the speedometer is not working. I didnt totally understand why but they knew it was gonna happen. My only logic is the B20A5 sensor is electronic but i think im way off on this one. I know the A20A spedo is cable driven so he lost me on why the spedo stopped working. Im sure they can help you out if you want.

But on the other hand i talked to the guy in Georgia from Accuformance a long time ago and he said he was running something like a AFC to get his working optimal. He had his B20A for some time and he told me he could get the discontinued APEX unit but this was probably a year ago. I dont remember the exact APEX name but it was basically an air/fuel controller so that would explain a lot.


Rob, the 88-89 Prelude used a cable driven speedometer. using a 88-89 pk2 ECU would solve the problem.

RobT5580
09-18-2003, 06:09 PM
Yeah i was very confused on why they wouldnt have a speedometer. I dont know which one they are using so i couldnt tell you why the spedo wont work. Is the 90-91 different and maybe this is why they have that problem? I dont know darryl had me thinking too much and im gonna use a SAFC to control my fuel for the turbo so im gonna stay with the A20A3 ECU for at least the time being but dont see any other advantage for my setup.

b20aTURBO
09-23-2003, 11:20 AM
Hey guys I have a few b20a headgaskets left if anyone is intersted or needs them let me know they are aftermarket not HONDA OEM but they do work I was running one on my b20 swap let me know

thegreatdane
06-11-2004, 05:44 AM
What happened to Yasu's "Project B20A"? Did he finnish it?

RobT5580
06-11-2004, 07:20 PM
Hmmm i have not talked to him in some time now but i know he was busy so im sure he still has it.

rambo_005
12-14-2004, 02:56 AM
It looked very promising! I hope he will get it done...