More turbo swap Q's
 

Ok I have read a lot of info here on the forum and seem to only be confusing myself instead of learning and i'm getting really tired of seeing stuff like this:

"The following words are either very common, too long, or too short and were not included in your search: s5"

So if somebody could help me out with links or info I would be VERY grateful!

What I have:
An '88 TII, previously had a half assed S5 turbo swap, harness is junk
N333 ECU
N318 knock sensor
N326 pressure sensor under dash
N377 pressure sensor under hood
N326 and 327 coils
N318 MAF

On the way:
S5 JDM TII engine, harness has been cut

What do I need to make this engine work with the components that are on it?

I know I need an N374 or N370 ecu to run the elec. OMP.
Do I need to get any other sensors?
What are the differences between the N374 and N370?
What are the differences in the JDM and USDM S5 harnesses?
Should I stick with my N333 and get a S4 harness that hasn't been hacked up?

TIA, J.

What is the interchange on MAF's for an N374 ECU? Will an N370 or 350 MAF work?

you need n370 maf, n370 map, n370 ecu, the n374 ecu wont fire your rear rotor injectors
you can run n374 maf and n374 map with a n370 ecu

even on an all jdm engine?
i picked up the following,
S5 TII Jspec harness
S5 TII BPS sensor N370
S5 TII Jspec N374 Ecu
my idea was to go all jdm since everything on the engine already is, and everything on the car is s4 and/or junk.
can i mix and match USDM s5 and JDM s5? You say the 374 ecu wont fire the rear injectors? I assume you mean that if the engines electronics are USDM? If so what USDM components are not compatible with the374 ecu? thanx for the info, J.

found 370 maf for a decent price but i hate to buy it and have it not work

Well it looks like another kick in the nuts is in store. I had hoped to save myself some trouble by just going all JDM but it would seem that this couldnt be further from the truth. Apparently there are some serious differences between harnesses that I was unaware of. I had anticipated differences in length b/t the jdm/usdm harnesses but not the total lack of some plugs and the diff b/t s4 and s5 plugs. What f$@^ing PITA.