drftk1d

if i want to put a s4 engine into a s5 (n/a) do i need any special wiring or anything?



i have all of the s4 electronics as far as the dash and engine are concerned.

about the transmission, can the s4 slave mate to the s5 master and is the reverse switch wiring different?



also can i use a radiator designed for the s4 on the s5?

jefraney

I just bought a S5 NA with a S4 T2 engine in it and the guy did one hell of a job re-wiring the car. He spliced in the S4 T2 ECU to the S5 body harness and used the S4 engine harness. I am not sure about what else he did, I am still trying to figure that out.

CrassFC3S

hmmmm....

drftk1d

im wondering if i cant just use all s4 stuff though or is it easier to just use the s5 crap

jefraney

I am not sure. If anything, just convert your S4 engine to a S5, only a few differences such as, the throttle body (mainly TPS), OMPs, and AFMs, and probally a few things here and there.

drftk1d

well i have an entire s4 car that i was going to install the turbo stuff into but i found a 90 na with a body in much better condition so i want to use that.



and the engine and accessories i had to swap was s4 as well as the rearend stuff.

jefraney

Just put all the S4 stuff in the S5 then, or rewire the ECU...

drftk1d

gah but that means switching body harnesses too...



im no electrician

jefraney

I will take a closer look at what the guy did on my car, and give you a wiring diagram or something if you want to just wire up the S4 turbo ECU.

drftk1d

i may just say f' it and get a microtech, but its a little out of the budget.

but if you do the wiring diagram that would be a BIG help.