I got a hf for 100 dollars and was going to swap a zc motor into it. I figure the zc is cheaper and will save 1000 dollars to put toward a turbo. Anyways I have been reading up on this swap, they say that I need either a PM7 (88-91 JDM Si), PG7 (88-91 integra), or PM6(USDM 88-91 Si) ECU. Other than the Cam and Distiburator wire convergine, to How do you swap the ECU? Would it be easiest getting a SI wiring harness and chip a PM6 ECU? I see that there are 4 wires the hf has that the SI doesn't and 3 wires that the SI has and the HF doesn't. The articals I have read only meantion the DX to multiport injection. They say that the wiring harness will work for the others, but how is this true if the hf and si harnesses are different? Also I live in pittsburgh pa. Does anyone know the best reseller of jdm engines arround here? I have a list of about 30 numbers that I am going to call on tuesday, but I know that the cheapest isn't always the way to go, or is it?

Please help
Brian

 

here are the wiring changes that you need to do:

 

let me get this right. This leads me to believe that I do not need to change the computer from the PM8.

 

you do need to change the computer to PM6, PM7 or PG7 - it just plugs right in