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View Full Version : I NEED HELP!! JDM B20 Swap Questions!!!



OldSchool86
04-03-2009, 09:37 AM
0

2ndGenGuy
04-03-2009, 10:53 AM
Is there a reason you keep reposting this same question in different areas? I already deleted one of them today. This would be duplicate post #3.

AccordB20A
04-03-2009, 11:59 AM
this one says I Have a JDM B20 out of a 86-89 Accord. I'm putting it in a 86 Accord Lx(carb car) What else do I need for the swap.
the other said Im getting a JDM B20 out of a 86-89 Accord. I'm putting it in a 86 Accord Lx(carb car) What else do I need for the swap.

but yes stick two one thread ow man!!

Ichiban
04-03-2009, 03:26 PM
What trans can I use?

JDM B20A, F2K5 or B2K5, or if you're creative, which I assume you're not, a JDM B18A tranny, or B18A bellhousing on USDM A20A transmission


Witch Ecu & Harness do I need?

You are obviously lacking the original. I have heard of people running B20A's on B20A5 ECU's


What axles will fit?

Depends on what transmission or intermediate shaft, if any, you use. Read.


What do I do with the big black vacume box?

Connect as intended. The intake manifold is the same as the A20A3


Please Help. Thanks

Please read. Thanks. Everyone who has posted information regarding this has just had their time wasted, by you.

OldSchool86
04-03-2009, 09:51 PM
To: GuyHatesMyCar
Why do you feel the need to be such a dick! I知 just looking for helpful advice. If you have a problem helping people why post anything at all. You gave some good info but, you were a dick while doing so. There is no point in trying to insult my creativity, I know all to well how to make adapter plates and cut and weld bell housings. But why do that when I can bolt something up. I'm new with the "Old" B20 stuff and was looking for help. So I guess what I知 trying to say is thank for the F*#king smart A$s Help/Advise that you gave me. It will be very helpful and I look forward to talking to you again.

From: your sweetheart Old school

MessyHonda
04-03-2009, 09:56 PM
do you have a transmission for it....that engine should drop right in....its a direct replacement. the harness should be the same off a fuel injected accord....plan on running fuel injection or carbs?

itzdave
04-04-2009, 09:51 AM
To: GuyHatesMyCar
Why do you feel the need to be such a dick! I知 just looking for helpful advice. If you have a problem helping people why post anything at all. You gave some good info but, you were a dick while doing so. There is no point in trying to insult my creativity, I know all to well how to make adapter plates and cut and weld bell housings. But why do that when I can bolt something up. I'm new with the "Old" B20 stuff and was looking for help. So I guess what I知 trying to say is thank for the F*#king smart A$s Help/Advise that you gave me. It will be very helpful and I look forward to talking to you again.

From: your sweetheart Old school

dude... seriously... i understand ur point, but think about it, there is a search bar up top that will point you WHEREVER you need to go on this site. because SO many people hop on here and ask the same questions, the answers are already ALL over this site. just do a lil bit of searchin and see what ya can find before typing - "i need to know everything, NOW!"

russiankid
04-04-2009, 11:50 AM
To: GuyHatesMyCar
Why do you feel the need to be such a dick! I知 just looking for helpful advice. If you have a problem helping people why post anything at all. You gave some good info but, you were a dick while doing so. There is no point in trying to insult my creativity, I know all to well how to make adapter plates and cut and weld bell housings. But why do that when I can bolt something up. I'm new with the "Old" B20 stuff and was looking for help. So I guess what I知 trying to say is thank for the F*#king smart A$s Help/Advise that you gave me. It will be very helpful and I look forward to talking to you again.

From: your sweetheart Old school

Because there is a reason why all this information is stickied. You just didn't care to read.

Ichiban
04-04-2009, 04:44 PM
To: GuyHatesMyCar
Why do you feel the need to be such a dick! I知 just looking for helpful advice. If you have a problem helping people why post anything at all. You gave some good info but, you were a dick while doing so. There is no point in trying to insult my creativity, I know all to well how to make adapter plates and cut and weld bell housings. But why do that when I can bolt something up. I'm new with the "Old" B20 stuff and was looking for help. So I guess what I知 trying to say is thank for the F*#king smart A$s Help/Advise that you gave me. It will be very helpful and I look forward to talking to you again.

From: your sweetheart Old school

Hey sweetheart, that's just the way I am. My assumptions are up to me, and it's up to you to prove me wrong.

I was actually throwing you a bone. The answers are indeed all over the site, and they are far more thorough and detailed than I can provide.

Oh, and good luck with the swap. Talk to you later.

OldSchool86
04-05-2009, 07:48 PM
do you have a transmission for it....that engine should drop right in....its a direct replacement. the harness should be the same off a fuel injected accord....plan on running fuel injection or carbs?

F/I no carbs on this build. still chasing down a trans. I have the Auto trans that it came with but i want the 5speed. also, are you saying i can use the LXi harness?

OldSchool86
04-05-2009, 07:52 PM
Hey sweetheart, that's just the way I am. My assumptions are up to me, and it's up to you to prove me wrong.

I was actually throwing you a bone. The answers are indeed all over the site, and they are far more thorough and detailed than I can provide.

Oh, and good luck with the swap. Talk to you later.

thaks for the reply G.H.M.C. you make me smile :) and for the info that you gave that was right in front of my face.

2oodoor
05-07-2009, 11:53 AM
old school, keep us posted on the adapter plate if it comes to that!
You have to ignor some of the newb flaming and also some of us myself included can come off abrasive at times so water off a ducks back man...

the auto tx will do till you get something? Not much difference really until you do get ready to put in a 5 speed, as far as what extra expense or work you have to do with the swap.

OldSchool86
05-08-2009, 07:48 AM
A to B Kit. Thats right I said it. The A20A trans to B20A engine Adapter plate is in the works. and F/I is out and quad carbs are in. I'll start a new thread about the build soon

Rendon LX-i
05-08-2009, 10:43 AM
woot woot...good to know bro...U GOing to have to sell some of those adapter plates on here

ghettogeddy
05-08-2009, 12:55 PM
is a a20 trans gona be able to hold a b20

2oodoor
05-08-2009, 01:16 PM
is a a20 trans gona be able to hold a b20

why wouldnt it? think about it....turbo guys are using them (?) only changing gear ratios in them for mods

ghettogeddy
05-08-2009, 01:23 PM
why wouldnt it? think about it....turbo guys are using them (?) only changing gear ratios in them for mods

idk i blew one in a carbed a20 lol

just dont fell right to me lol

but they are a dime a dozen so who cares

now my other question is clearance
the stock motor trans setup buts the trans like almost right at the fender well how much bangin you gona have to do to get it to fit with an adapter

OldSchool86
05-08-2009, 09:31 PM
idk i blew one in a carbed a20 lol

just dont fell right to me lol

but they are a dime a dozen so who cares

now my other question is clearance
the stock motor trans setup buts the trans like almost right at the fender well how much bangin you gona have to do to get it to fit with an adapter

the adapter plate will only be 1/2" thick. plenty of room for that. plus for us guys with no trans and its not like b2k5's are just laying around waiting to be bought, we have to be crafty. hey the H to B kit started as and idea as well and now it sells for $1000+.
P.S.
another option is the d-series trans. its almost exactly the same. take a look.
http://c4.ac-images.myspacecdn.com/images02/101/l_76250db6d9cc476690032aed30570bef.jpg

if i can make it fit ill just have to do a hydro conversion to make it work and get an electronic speedo

Rendon LX-i
05-08-2009, 11:02 PM
Ive been boostin my a20 trans for awhile now LOL....she not sounding to great...what you expect when a i bought it for 100 at a jy with 150,000 miles

AccordB20A
05-08-2009, 11:35 PM
i had a ZC gearbox bolted to a b20 dogily. the clutch spline lined up and one of the upper bolts. im sure u can be made to work

OldSchool86
05-09-2009, 09:18 PM
i had a ZC gearbox bolted to a b20 dogily. the clutch spline lined up and one of the upper bolts. im sure u can be made to work

wait... could you explain that a little better?..you had a complete ZC trans mounted to the B20A or you just had the gear box mounted to the b2k5 or B18A bell housing?

mykwikcoupe
05-09-2009, 09:52 PM
so thats 1 bolt in the entire transmission holding it together? Thats super dogily

RobT5580
05-10-2009, 01:33 PM
The funny thing is he has access to B20A's LOL were not even that desperate or atleast im not.

AccordB20A
05-10-2009, 02:46 PM
nah i would never run it like that it would probably still be off balance i was just saying 1 bolt lined up lol

2oodoor
05-10-2009, 03:25 PM
i think the point being made here is it may be less design issues making the adapter fit the B20a accord engine to a D series tranny??

who was it before that was working on one of these, SQ?

im not really desparate either, I would leave the auto tx on mine anyway since I have future plans on a b series swap in a different 3rd gen

mykwikcoupe
05-10-2009, 03:56 PM
tommy mentioned it before. not sure what ever came of it though. I think the NZ guys need to find more b18 housings or guyhatesmycar needs to find a way to make them.

Ichiban
05-19-2009, 06:56 PM
I was looking at my A18 bellhousing before I chopped it up for research. It actually looks like the dowels are in a similar location to the B20A. If so, the wronged bolt holes could be solved with a little milling and an adapter plate.

OldSchool86
05-21-2009, 05:53 PM
the s20 (92-95 civic) trans guide pins are an exact match to the b20a and the center line of the crank matches the center line of the trans main shaft perfectly. Minor fab has to be done to the bolt holes to bolt it up.

http://c2.ac-images.myspacecdn.com/images02/108/l_857425ee031c402380a09190aae759ad.jpg
http://c2.ac-images.myspacecdn.com/images02/73/l_65b69b5e91774aac85e01260359c163d.jpg
http://c1.ac-images.myspacecdn.com/images02/82/l_6011016fe27b4974993d556dd44ddd1c.jpg
http://c4.ac-images.myspacecdn.com/images02/104/l_b9a1f89825074c4fa0a3fa754056946f.jpg
http://c2.ac-images.myspacecdn.com/images02/74/l_fab01e64986f44e9b3c6ea83979d8d75.jpg
http://c3.ac-images.myspacecdn.com/images02/111/l_b40955fe99fb4091ace9d66656f34bee.jpg
http://c4.ac-images.myspacecdn.com/images02/84/l_426843042fe24036b52ab1bff750cb37.jpg

By the way. that is the speed sensor out of the b20a auto trans. its a perfect fit to.

Ichiban
05-21-2009, 06:51 PM
Wow, that's way closer than the A20 bellhousing ever was. How about the starter mounting location. Also, I would want to confirm the input shaft centerline with the crank bores with a dial indicator, but if it looks the same, it probably is.

What spline axles does the S20 transmission use?

OldSchool86
05-21-2009, 07:07 PM
the civic has less splines you will need to use the inner joint from a 92-95 civic for the axles. but with doing that you will have to mill the side of the block because of the size of the axle.
http://farm4.static.flickr.com/3554/3553310444_7c5ac69997.jpg?v=0
unless the 87 Integra Intermediate shaft will fit the s20 trans(87 Tegy has a short shaft just like the b2k5 trans.) I'm going to pull one from the jy to confirm it fits so i will keep you you updated

OldSchool86
05-21-2009, 07:19 PM
the auto b20 starter fits in like a glove but only one of the bolts lines up. i'll have to check later to see if the civic starter will spline to the b20 flywheel. also you can use the civic clutch disc with the b20 pressure plate(you cant use the b20 clutch disc)(it has different splines)but the overall width of the civic disc is only 1/8" larger that the b20 disc. so it should fit the flywheel just fine.

Rendon LX-i
05-21-2009, 07:23 PM
thats sick bro...great job...

MessyHonda
05-22-2009, 12:22 PM
i like the way this thread is going...hope my 5 speed does not mess up on me

A18A
05-22-2009, 04:07 PM
it shouldn't if it just sits in a shed for years on end :kekeke:

Civic Accord Honda
05-22-2009, 04:22 PM
you know you wont have to worry about the hydro clutch conversion if u get a 88-81 civic gear box? and its the same bolt pattern :D

OldSchool86
05-22-2009, 09:32 PM
you know you wont have to worry about the hydro clutch conversion if u get a 88-81 civic gear box? and its the same bolt pattern :D

but i would still have the hydro clutch fork in the bellhousing. only the slave mounts on the gear box. so it would not make sense to swap the gear box.

MessyHonda
05-23-2009, 10:12 AM
it shouldn't if it just sits in a shed for years on end :kekeke:

yeah...im thinking of throwing my b16 mani on the a20 and taking it to the dyno for one last time and call it a day...then swap in my b20

2ndGenGuy
05-25-2009, 06:26 PM
I like how this is going! That's very interesting. Might make those B20A automatic motors, and longblocks just a bit more valuable.

carotman
05-26-2009, 05:38 AM
but i would still have the hydro clutch fork in the bellhousing. only the slave mounts on the gear box. so it would not make sense to swap the gear box.

Herrr no. The 88-91 D series Transmission is exactly like our cable transmission. No hydro fork or anything there.

FYI, the 88-89 B20A5 flywheel sits further from the engine block compared to the JDM Accord B20A. If you use this flywheel, the Civic starter might fit like a glove. I used the B20A5 flywheel in my car ans had to space the starter a bit in order to make it work 100%

2ndGenGuy
05-26-2009, 08:49 AM
Hmm I was just looking... won't that output shaft hit the oilpan?

2oodoor
05-26-2009, 10:32 AM
look closely at the picture below that one 2ndGG, what do you notice?
something looks different with fitament.

2ndGenGuy
05-26-2009, 11:06 AM
look closely at the picture below that one 2ndGG, what do you notice?
something looks different with fitament.

Yeah the bolt holes don't line up at all. But I think with the guide dowels lining up at least it makes welding something to the bellhousing easier. You could extend those upper bolt holes on the transmission up a little higher. Also, no dogbone mount!! Is that what you're suggesting? And then of course, the cable shift linkage which is FTL.

bullard123
05-26-2009, 12:25 PM
Great thread! Thumbs up for all of the research you are putting into this

OldSchool86
05-27-2009, 07:58 AM
the rear mount will bolt to z6 trans. you just have to re-drill the lower hole on the mount about a 1/4 inch higher.

OldSchool86
05-27-2009, 08:03 AM
as far as the axle hitting on the oil pan goes. IF!! wait let me backtrack. the 86-89 teggy also has a intermediate shaft just like the b20a trans. (meaning to of the same size axles) so!!! if that shaft from the teggy will spline into the z6 trans. we will have no problem.

2ndGenGuy
05-27-2009, 09:43 AM
But you still gotta have a place to bolt the other end of the intermediate shaft. And that is usually on the back of the block. I don't see it happening with the shaft that close underneath of the block. You should slam the oil pan on there really quick and get pictures of that.

OldSchool86
05-27-2009, 12:38 PM
ok i'll get some pics of it tonight

OldSchool86
05-29-2009, 12:11 AM
Here you go guys. as you can see the Intermediate shaft does not hit on the oil pan. I'm 1 step closer to having a new hybrid. "B20Z6" I shall Call it.
http://c4.ac-images.myspacecdn.com/images02/99/l_283e2ca4099642c5b9bc7d08377e8147.jpg
http://c2.ac-images.myspacecdn.com/images02/69/l_2fbe1f4f650e44bc90bc781cc99711fd.jpg
http://c4.ac-images.myspacecdn.com/images02/73/l_f3be74e0b32b4d9ea78f3835055a464f.jpg
http://c3.ac-images.myspacecdn.com/images02/83/l_74ece2dfef364dd3a97947f38f85f48e.jpg
http://c3.ac-images.myspacecdn.com/images02/91/l_1f3d25a056054b6c91f033c28cd8ce72.jpg
http://c4.ac-images.myspacecdn.com/images02/93/l_c18ca398e1db4fba8270e9628638a4e7.jpg

A18A
05-29-2009, 12:17 AM
minter!

AccordB20A
05-29-2009, 01:03 AM
i told you d series boxes were close haha will need cable clutch one tho. and LSD too of course

OldSchool86
05-29-2009, 03:45 AM
the cable clutch part is easy. the mounting bracket for the cable vertical, and the clutch fork on the hydro runs Horizontal. so all you do is make the bracket and cable to run horizontal and drill a hole in the clutch fork so that you can attach the cable and viola, its cable.

Tdurr
05-29-2009, 07:33 AM
oh shit! nice work bro! I wanna see this thing once u get it running! looks interesting! btw where do u stay at in atl man?

2ndGenGuy
05-29-2009, 08:20 AM
Shit that's rad. The bracket looks like it's pretty close to bolting up. That shaft doesn't have to come out at an angle does it? Either way, you're getting close. What shaft was that? The B20A shaft or the Integra shaft?

2oodoor
05-29-2009, 09:17 AM
oh shit! nice work bro! I wanna see this thing once u get it running! looks interesting! btw where do u stay at in atl man?

x2

OldSchool86
05-30-2009, 04:36 AM
That was the b20 shaft. :NOTE: The b20 has bigger splines than the Z6 has, so i had to take the diff out of bell housing, thats why the shaft fit and was sitting at an angle.
I've got some more R&D to do.
P.S.
Does anyone know how many splines the 87-89 Integra axles(input side)

OldSchool86
05-30-2009, 04:38 AM
oh shit! nice work bro! I wanna see this thing once u get it running! looks interesting! btw where do u stay at in atl man?

About 20M south of Atlanta

A18A
06-09-2009, 06:24 AM
any updates?

OldSchool86
06-09-2009, 07:43 AM
had to put it on hold for the moment. my wifes trans tuck a crap so i have to rebuild it.

AccordB20A
07-31-2009, 07:10 PM
this is tempting me to stick a b20a into my civic. i have a d series box too and it would make bolting a b20a into the civic as easy as bolting one into an accord if the box can be adapted to the b20 block

A18A
08-01-2009, 04:21 PM
i put a b20a into my civic yesterday (Y)

86ccord
08-01-2009, 05:09 PM
i put a b16 in to my si.. wait wait WAIT.. it came with the b16 allready in it.. lol


but cool build bro! im ready to see how this thing turns out.. and its always great to have a GA member ..:D good luck!