B20B swap.

[kris]

Okay, without really knowing what I have gotten myself into, I just ordered a B20 here locally. So, now I need to get the extra shit I need to get it setup in my car.

So, I tried searching the forums here, and a few other places, but I really couldnt find much info on the B20. I assume it is similar to the B18 swap. I know I need new mounts, tranny, and shift linkage. Thats about it right? I will have to either pickup a OBD1 conversion, or wire in the OBD1 harness myself right? ECU will be that of a LS. Actually, I have read dyno sheets that show the DX/P06 ecu actually provided higher numbers.

Anyways, has anyone in the forum done just the B20 yet? I am trying to get ahold of Will, but he seems dead to the world.

Any help would be appreciated.

Also, I just picked up a decent 88' Si for $400.

Thanks

[91zc]

Ok you will also need a 90-93 rear and drivers side motor mount brackets. You could also think about keeping it obd0 and use the 90-91 integra distributor, injectors, and 90-91 integra PR4 ecu.

[Fishcat37]

are you doing straight B20B or CRVTEC? if you are going str8 b20, then you need to use a b16 intake manifold or a b18a/b one. The stock b20 one (giraffe) is too tall, and it wont clear your hood. you dont want that piece of ish anyways. :hehe:

[mellowboy]

Originally posted by Fishcat37
are you doing straight B20B or CRVTEC? if you are going str8 b20, then you need to use a b16 intake manifold or a b18a/b one.

I agree with you ALMOST. You can only use the ls manifold.

[Redline_civic91]

yup if you use the b16 mani you need the head.

kris good choice of engine, when your done you will know why i love this engine so much. when i had straight 2liter i was running an ls comp. many people say thats the best comp. for straight 2L when it comes to air and fuel mixtures. on your motor mounts i would strongly recommend placeracing. not much vibration at all and holds the motor in there straight and firm. i've never heard about needing 90-93 motor mount brackets. i dont have them. now your tranny, an ls tranny would work fine, you'd have longer gears and a good 5th. the ls is a very good tranny and hard to fine. a b16 would be ideal if your looking for acceleration and quick shifting. i would recommend this one. also very hard to find. on your shift linkage all we did is modify my stock one. it will work just fine. or you can buy a new one. i think they run around $100.

but anyways good luck, if you have any questions or get stuck on something pm me i will call my mech. and i'll have him tell me what you should do.

once its on consider saving for a vtec head and all hell breaks loose in your car

[Melt]

also send a pm out to 'york2600' ... I will tell him about this thread, but he is busy doing b20/vtec in his 94 GSR. Here is the thread with pictures and the stuff he has done so far.

http://www.automotiveforums.com/vbul...ghlight=crvtec

[kris]

Straight B20 right now.

Since I doubt I can get all this done by the meet next month, here is whats going on.

As soon as I pickup this hatch, I will strip it down. I mean everything. I will fix the minor flaws, then prep and paint it. Once thats done, I will work on getting it put back together, with the B20. The motor that is in that car, will be put in my current hatch, since my nice a6 I built has crapped out. That way I am not in a rush to get things ready for May, and I have something driveable.

As for the rear bracket, I have that already. Trans, I have access to a LS trans, but I am sure the b16 trans would be better. Not sure on what I will do with that.

Now, I have all the parts to keep it OBD-0. I would just use my existing harness, LS dizzy, and ECU. Would I need to swap in the LS cams? Or keep the B20 cams?

Also, would it be better to convert to OBD-1? I have most everything from a OBD-1 Motor, but not sure on what the pro's and con's are.

As for the intake manifold, which year? I have two sitting here, but they are from a 93 and a 91. I have read the ls manifold flows way better than the b20's. But again, not sure on the years that were being dyno'd. I have a GSR exhaust manifold to put on it for now, rather than order a aftermarket one.

Thanks so far..

[mellowboy]

Originally posted by kris


Now, I have all the parts to keep it OBD-0. I would just use my existing harness, LS dizzy, and ECU. Would I need to swap in the LS cams? Or keep the B20 cams?

I would keep it non obd cause of less restrictions. U can keep your b20 cams. The head are the same so...?

[mellowboy]

Originally posted by kris

As for the intake manifold, which year? I have two sitting here, but they are from a 93 and a 91.

Any of them will fit

[Civic Jim]

at least u have started the ball rolling !!!!

[kris]

Originally posted by mellowboy



I would keep it non obd cause of less restrictions. U can keep your b20 cams. The head are the same so...?

Well, arent automatic cams a little more mild than a standard? Thus the B20 might gain from LS cams? Just wondering on that...

[TrailerParkJake]

wow i made it to this board for once :o

on my b20b i kept it obd0 and used a 91 ls ecu, and it plugged right in so i didnt have to rewire anything except a manual switch to the cooling fan because for some reason it didnt kick on automatically after the swap. i used a 91 teg dizzy, alternator flywheel and starter with a 90 ls tranny.....i also swapped out the clutch cable and throttle cable with one from a teg...i just used a skunk2 intake manifold on mine, but i still had to shave it to get the bolts to fit...shitty craftsmanship i tell ya
have fun picking up bolts and misc junk from the dealership...i was there all the damn time..
hit me up if you need any help

[Melt]

yeah man where have you been? The A/C compressor you sold me is still running strong :coolguy:

[TrailerParkJake]

Originally posted by Melt
yeah man where have you been? The A/C compressor you sold me is still running strong :coolguy:

i jsut havent been on here or if much....it was like the same crap over and over and over again...i just needed a break

[Melt]

yeah man I feel you ... if has been down for like a week! But oh well, im chillin here