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View Full Version : a20 to b20a swap help!!!! carb to fi



stevenr816
06-26-2006, 04:01 PM
i have a '86 honda accord with an a20 in it. i was reading the latest issue of honda tuning and they have a section about how you can swap a b20a into it with out changing anything. i know that the old a20 intake manifold will bolt right up, but i want to make it fuel injected. what do i need for this? the correct ecu, the vaccum box ????

thanks,
steven

ZackieDarko
06-26-2006, 09:03 PM
NICE a person joining the site as a direct result of that artical...NICE

maybe more n00bs will come and join and learn the ways of the A20 :-D

stevenr816 since you are new i will tell you now that just about everybody will say "use the search button" but i will help you out and link you to what you need

*****
http://www.3geez.com/forum/showthread.php?t=112
*****

http://www.3geez.com/forum/showthread.php?t=31622

http://www.3geez.com/forum/showthread.php?t=46908

you should also check this out
http://www.3geez.com/forum/showthread.php?t=49453

also read up here
http://www.3geez.com/forum/forumdisplay.php?f=19

help me out if im missen anything guys

p.s.
good luck on finding a B20 and a 5spd tranny :)

carotman
06-27-2006, 09:00 AM
yeah what they didn't tell in the article is that the B20A is damn near impossible to find...

reanimator420
06-27-2006, 01:19 PM
yep and also needs to be jdmb20a out of the 2g prelude or a jdm 3 g. that is a shame that a usdm b2oa will not work cause there is tons of them laying around

EducatedFool
06-27-2006, 01:27 PM
yeah what they didn't tell in the article is that the B20A is damn near impossible to find...

unless you live in a japanese junkyard :D

reanimator420
06-27-2006, 01:28 PM
i wish i did b/c i would sleep in the trunk of a jdm teg or a 2.0si 3g accord

stevenr816
06-27-2006, 02:34 PM
i have found an engine for $500, shipping shouldnt be that much. thanks for all the help, the first link is great!

steven

EducatedFool
06-27-2006, 03:16 PM
uhh.... sure it's the right engine? might wanna let us know what it is before you buy something you can't use

Legend_master
06-27-2006, 03:17 PM
i have found an engine for $500, shipping shouldnt be that much. thanks for all the help, the first link is great!
steven

Make sure that is the right b20, if not you are going to be sorry.

stevenr816
06-27-2006, 03:37 PM
Make sure that is the right b20, if not you are going to be sorry. i will make sure to!

stevenr816
06-27-2006, 04:32 PM
Make sure that is the right b20, if not you are going to be sorry.
ya i just found another place that wants $590 for it. i guess they are that cheap. i asked the guy plenty of times and he says its a b20A from a 89-90 lude with 45k on it, and extra 150 for the tranny or my choice (manual or auto), 150-175 for shipping. the website is www.hmotorsonline.com the guy doesnt have the b20a online but i called and asked him. also he said it has 9.? compression and 160hp and 140ft-lbs which is all correct.......so what do you guys think?

EducatedFool
06-27-2006, 05:04 PM
I just sent them an e-mail to verify that it is indeed the proper engine. I'll let you guys know what I find out.

stevenr816
06-27-2006, 05:18 PM
thanks EducatedFool!

forrest89sei
06-27-2006, 05:34 PM
ya i just found another place that wants $590 for it. i guess they are that cheap. i asked the guy plenty of times and he says its a b20A from a 89-90 lude with 45k on it, and extra 150 for the tranny or my choice (manual or auto), 150-175 for shipping. the website is www.hmotorsonline.com the guy doesnt have the b20a online but i called and asked him. also he said it has 9.? compression and 160hp and 140ft-lbs which is all correct.......so what do you guys think?

a 88-91 Prelude B20 would be a 3rd Gen B20

You Need a B20 out of a : 1984-87 Prelude or 1985-89 Accord.

Good Luck,

And Welcome to 3GEEZ

stevenr816
06-27-2006, 05:44 PM
a 88-91 Prelude B20 would be a 3rd Gen B20

You Need a B20 out of a : 1984-87 Prelude or 1985-89 Accord.

Good Luck,

And Welcome to 3GEEZ


the guy told me if i get a b20a from a 91 lude it would be a b21. the mag says that the 2gen lude andthe 3gen accord had b20a motors so i need one from them. does this help? source -honda tuning july 2006

steven

EducatedFool
06-27-2006, 05:48 PM
we've all already read that article :P i have the mag here. trust me, we know what we're talking about.

stevenr816
06-27-2006, 08:25 PM
we've all already read that article :P i have the mag here. trust me, we know what we're talking about.

so do i need an engine from a 84-87 lude/85-89 accord or a 2nd gen lude and 3 accord or are they the same thing? thanks for all the help guys!

from what i've read on this thread
http://www.3geez.com/forum/showthread.php?s=&threadid=86
i need a b20a from a 2gen lude or 3gen accord that has a gold valve cover (1st version 86-87)
is that right?

gfrg88
06-27-2006, 10:14 PM
the engine has to be from a JDM/EDM '84-87 prelude or 85-89 accord. its can not be from anything else. and im just going to say, that i think the a20 is much better than the b20 ;)

EducatedFool
06-28-2006, 04:15 AM
to answer your question once and for all:

Hi,

Thank you for taking an interest in our company. I'm sorry, we
dont get those motors. If you have any other questions or concerns,
please dont hesistate to give us a call.

--
HMO
www.hmotorsonline.com
(818) 723-2572 or (818) 768-3067

stevenr816
06-28-2006, 09:26 AM
the engine has to be from a JDM/EDM '84-87 prelude or 85-89 accord. its can not be from anything else. and im just going to say, that i think the a20 is much better than the b20 ;)
why is that? 98hp ...............160hp and alot more products for them?

Legend_master
06-28-2006, 10:03 AM
why is that? 98hp ...............160hp and alot more products for them?


theres is nothing for the b20 that you cant get for the a20. All the parts you see for the b20 on the net are for a completly different motor.

ZackieDarko
06-28-2006, 10:24 AM
well the A20 is one gaint hunk of CAST IRON and has a closed deck for one

:-P

and you can pump what...12psi into a STOCK A20 with no modifications to the internals of the engine..i would say thats pretty cool huh?

but then again the B20 is DOHC and makes a lot more power stock...so its your choice..oh and the A20's are everywhere and replacement parts are uber cheap :-p

stevenr816
06-28-2006, 02:02 PM
well the A20 is one gaint hunk of CAST IRON and has a closed deck for one
:-P
and you can pump what...12psi into a STOCK A20 with no modifications to the internals of the engine..i would say thats pretty cool huh?
but then again the B20 is DOHC and makes a lot more power stock...so its your choice..oh and the A20's are everywhere and replacement parts are uber cheap :-p
so, if i keep the a20 i can put 12pounds in it, what about the b20? i've seen plenty of parts on ebay and everywhere for b20's but not a20's. but some one posted that the b20 parts arent for the b20a?!? whats that about? also, most of the reason why i want to get a b20a is cause my a20 has 238k on it, it idles at 2k+ no matter what i adjust cause if it goes below 2k it dies. I've replaced the coil, distributer, plugs, wires, rebuilt the card and adjusted it many times. rebuilt the head. so.......thats most of the reason, but if anyone has an explination to it idling at 2k+ then tell me...........


steven

stevenr816
06-28-2006, 02:03 PM
theres is nothing for the b20 that you cant get for the a20. All the parts you see for the b20 on the net are for a completly different motor.
what do you mean a completly different motor? if it says for a b20 shouldnt it be for a b20?

EducatedFool
06-28-2006, 02:04 PM
busted ECU?

lol, anyways, I promise you that 99% of the parts you find for "B20's" don't fit this B20.

Legend_master
06-28-2006, 02:55 PM
what do you mean a completly different motor? if it says for a b20 shouldnt it be for a b20?


Listen dude, this site has TONS of knowledge and has been around this question over and over. We have all had these ideas and tried to figure out how to accomplish them and once our dreams were crushed we figured out that a turbo a20 is the best alternative to a motor swap (and actually makes a lot of power)

The b20B/Z came in the 98-00 Honda CRV it is a 2.0L version of the integra LS b18a/b motor. This motor has nothing to do with the b20a you need, the block, crank, pistons, head, and all other varios parts are not the same.

The b20 you are looking for was produced in the 80's and was only available in the older jdm preludes and the EDM/JDM accords.

There was another b20? made for the 88-91 preludes, but that motor will not fit in our cars either.

As for the a20/b20 comment I made, there is not much aftermarket support for the b20, just as there is no aftermarket support for the a20. This means you are just as likely to find performance parts for the a20 as you are for the b20.

ZackieDarko
06-28-2006, 04:06 PM
Well if you were gonna go and turbo a A20 I wouldn't just go and shove a ton of boost down its throat. With that many miles I would definetly get a compression test if you werent gonna go and rebuild the whole thing, at least get it brought back to OEM specs.

Legend master hit it on the head with what he said on his latest post in this thread.

stevenr816
06-28-2006, 06:46 PM
well as of right now im doing a vacuum line removal but i dont know what stage i should do cause i dont know what the benifites are and what not. i guess it doesnt really matter because in a couple months im doing the fi conversion so....... if someone could help me with websites for a20 parts that would be cool cause i have never seen any in my life except for replacemnet parts. b20a motors are different but everyone says they are not the same b20 parts?!?

EducatedFool
06-28-2006, 09:49 PM
ok dude, you're not gonna find these B20A parts ANYWHERE in the United States. All part are either imported from Japan, or a few things will fit from the A20. What is so hard to understand? It even says it in the damn article that the B20A is not compatible with any other B20, or B-series engines.

snoopyloopy
06-28-2006, 09:51 PM
yeah, because the b20a that we're talking about was never sold in cars here, no one carries parts for them. a few parts will fit from the b20a5/7 but don't count on it happening a lot.

ZackieDarko
06-28-2006, 10:19 PM
www.nopieonline.com

they have SOME parts for our cars

Legend_master
06-29-2006, 12:06 AM
www.nopieonline.com
they have SOME parts for our cars

your link is wrong it's www.nopi.com (http://www.nopi.com)

stevenr816
06-29-2006, 12:45 AM
maybe i wont get a b20a after all?!? ill find out after i do the fi conversion to see how it runs, or atleast after the vacuum line removal. since it always idles at 2k+ and if it goes below that it dies. no vacuum line leaks, new msd coil, accel wires, bosch plugs, distributer, rebuilt carb and head, and compression checked the cylinders (125 psi across) so thats why i want a swap besides the 236k on it.


where can i get a turbo for the a20 (mines a bs but that doesnt matter)?
also what about a cam?

ZackieDarko
06-29-2006, 01:04 PM
you can send a cam to Delta and they can re-grind it for you

http://www.deltacam.com/

you can use any turbo you want you just need a manifold

EducatedFool
06-29-2006, 01:48 PM
Paeco regrinds cams and Gude makes an entire head kit.

stevenr816
06-30-2006, 12:43 PM
ok today i did the vacuum line removal. im pretty sure i did a stage 3+ cause i left the secondary on so....... the car runs great so far! it idles at 900-1100 it could idle a little better! my question is do i now need to adjust the distributer timing since i had the distributer timing set when it idled at 2k+? cause it dies down alot when you let the clutch out and you have to give it alot of gas. other then that it has alot of top end power, and runs richer then it did. does good burnouts now! i have one more question, with 236k on the motor the valve springs are probably weak, so before this it could bearly go to 7500 and just bearly sit there, but now it goes straight up there and it sounds like its valve float??? i havent heard it before, i know its not a rev limiter cause the red line is at 6200-6300 .......so im happy now. i just need to do the fi conversion now. the engine bay looks alot cleaner with everything gone. i'll post pics in awhile.
:thumbup:
steven
ok here are the pics!
before:
http://i23.photobucket.com/albums/b395/stevenr816/98cef7bc.jpg
after:
http://i23.photobucket.com/albums/b395/stevenr816/100_5732.jpg
http://i23.photobucket.com/albums/b395/stevenr816/100_5735.jpg
http://i23.photobucket.com/albums/b395/stevenr816/100_5736.jpg
http://i23.photobucket.com/albums/b395/stevenr816/100_5733.jpg
http://i23.photobucket.com/albums/b395/stevenr816/100_5739.jpg
http://i23.photobucket.com/albums/b395/stevenr816/100_5731.jpg
http://i23.photobucket.com/albums/b395/stevenr816/100_5730.jpg
http://i23.photobucket.com/albums/b395/stevenr816/100_5734.jpg

stevenr816
06-30-2006, 02:13 PM
all the parts i took off:
http://i23.photobucket.com/albums/b395/stevenr816/100_5744.jpg

http://i23.photobucket.com/albums/b395/stevenr816/100_5740.jpg

http://i23.photobucket.com/albums/b395/stevenr816/100_5741.jpg

EducatedFool
07-02-2006, 07:27 PM
question 1: does removing all that stuff have some kind of detrimental affect on the car?

question 2: any idea how performance can be affected by this?

I'm gonna try to get my hands on another 3g, trying to make something that can beat some ricers :P


also, i inquired to a company about getting the B20A's that WE need. i'll let u guys know how it goes.

keruhas184
07-03-2006, 06:14 AM
with 236k on the motor the valve springs are probably weak, so before this it could bearly go to 7500 and just bearly sit there, but now it goes straight up there and it sounds like its valve float??? i havent heard it before, i know its not a rev limiter cause the red line is at 6200-6300 .......so im happy now.

Why the hell would you rev such an old stock motor past the redline? Dude, no wonder you think you're getting valve float. Carbed 3Gs don't have a rev limiter. My advice to you is to find a low milage efi motor and swap the whole thing into the body you have. Then you can work with the efi motor and could turbo it down the road.

stevenr816
07-04-2006, 01:08 PM
question 1: does removing all that stuff have some kind of detrimental affect on the car?
question 2: any idea how performance can be affected by this?
I'm gonna try to get my hands on another 3g, trying to make something that can beat some ricers :P
also, i inquired to a company about getting the B20A's that WE need. i'll let u guys know how it goes.
i know it runs alot richer cause i have a a/f gauge, it has alot more top end, and my car actually idles at 1k. it runs great now! i dont think that removing all of the stuff has affect on the car except for the ability to pass emissions and thats it.

stevenr816
07-04-2006, 01:13 PM
Why the hell would you rev such an old stock motor past the redline? Dude, no wonder you think you're getting valve float. Carbed 3Gs don't have a rev limiter. My advice to you is to find a low milage efi motor and swap the whole thing into the body you have. Then you can work with the efi motor and could turbo it down the road.

i was driving and missed 2nd since there was such a big differnce after doing the vacuum line conversion, that why it reved to 7500. well im planning on doing the efi conversion (since i have to do it before the new motor) so once i do that i'll probably go but another motor cause i do want to boost it or spray a little 50 shot. or i could go get a 50 shot and blow this motor when i buy a new motor, i think that would be fun since its life is almost over anyway. do you know any companys that sell a turbo kit for an a20?

steven

keruhas184
07-04-2006, 03:19 PM
Nobody sells a turbo kits for A20s. You'll have to go all custom. There are a few places that make very A20 nice turbo manifolds, I think you'll find them in the turbo faq.

EducatedFool
07-10-2006, 05:35 PM
Brad @ rims and things has 2 B20A's, but only w/ auto trannys :( he wants 800 for each swap.