1990 f22a4 to a f22b1

[mfortune333]

will the f22a4 automatic trans bolt up to the the f22b1 engine and is this a straight bolt in swap and also if the f22b1 is obd2 can i hardwire the b1 ecu to my a4 harness?

[wildBill83]

DON'T DO IT!!!

I'm just trying to save you some heartache.

DON'T DO IT!!!

Find an H22A1 or F22A6 if you need a new motor and want more umph..

Check the swaps section for a good reason why.

[Tippey764]

If he just wants a stock replacement then there is no reason against the swap.

[wildBill83]

Other than he will have to either adapt his car to OBD2 or the motor to OBD1? Also he will have to find a P28 or PT6 ECU if he goes the ODB1 motor conversion route.

It can be a few extra costs just to get a economy VTEC.

[mfortune333]

Alright im doing it no matter what lol! The reason ffor me doing it is my a4 hass a cracked block! I already own the b1 as well! Imm doing for a daily driver nothing else soo? Will the transs bolt up? And i have the a4 and the b1 harnesses can i make this work?

[mfortune333]

Also cant i put the a4 head on the b1 bloxxk?

[wildBill83]

It will bolt right up, it will not wire right in. Any thoughts on using the A4 IM/H/E on the B1 block?

Use your A4 alt, and maybe the P/S pump if you do the A4 head swap.

If you already own the motor then I cannot argue with the logic.

You will have OBD1 conversion fun though. I wish you the best of luck.

[Tippey764]

Here is some good info on the b1 swap

http://www.cb7tuner.com/vbb/showthread.php?t=138663

[Tippey764]

You will have OBD1 conversion fun though. I wish you the best of luck.

And an obd1 conversion isn't hard when the motor came in obd1 form in 9495 accord EX's

[wildBill83]

I understand, and I hope the OP has an ODB1, but there are far more OBD2 F22B1 motors floating around than ODB1. But if he does have the OBD1 then it should be a walk in the park. I believe he said he has an ODB2 though.

OP, do you have the OBD1 ECU for the F22B1?

Me personally would use all F22A4 parts and the F22B1 block and not deal with the VTEC and extra wiring.

[SOHC-FTW]

If he kept his A4 he can just use parts from it to convert and just use a p0a ecu from a 94-95ex. It's pretty simple.

As for vtec it's 2 wires lol he can always just use his A4 head on the b1 block aswell.

[mfortune333]

Yeah sadlyy its obd2! And yeah im gonna use the a4 head due to better flow if i use the head from the a4 nothing will have to change right? Idk it has a cracked block tho and is backfiring from the throttle body!

[Tippey764]

I understand, and I hope the OP has an ODB1, but there are far more OBD2 F22B1 motors floating around than ODB1. But if he does have the OBD1 then it should be a walk in the park. I believe he said he has an ODB2 though.

OP, do you have the OBD1 ECU for the F22B1?

Me personally would use all F22A4 parts and the F22B1 block and not deal with the VTEC and extra wiring.

Once you tear the head off you're into replacing various gaskets and shit

That right there is more work and money

OBD2 to OBD1 is simple, swap the distributor and the injectors as well as the IACV, there might be one thing i'm forgetting but thats the most part of it

[wildBill83]

Alternator will need a swap as well.

OP do you have the F22B1 exhaust header?

Taking the head off you just need to redo the head gasket and valve cover seals, oh and exhaust and intake gaskets.

[Tippey764]

Yeah sadlyy its obd2! And yeah im gonna use the a4 head due to better flow if i use the head from the a4 nothing will have to change right? Idk it has a cracked block tho and is backfiring from the throttle body!

I'd stick with the b1, it makes more power in stock form. That is if you're seriously not going to modify it.

But yeah you could swap the heads on the blocks and then you will basically have an f22a4 again.