So I Jus picked up a s4 t2 engine. I am putting it in my 87' gxl. The engine came with ecu,wiring harness and trans. It apparently has an s5 turbo setup. I was Jus wondering if the wiring harness might be modified for this. The car was a t2 chassis. I've been reading and saw there is some plugs that need to be added? Is this true? The engine ran when pulled I guess. How many wires need to be modified to do this swap. I have no p/s,a/c, heater, nothing. Jus used for track only. I still have my n/a harness. Should I adapt that for the swap?

 

i did my swap and used the STOCK NA harness.

are u asking if theres going to be a difference because of the s5 turbo?
--i dont see y there would be.

the only difference was the injector plugs, on the harness, and thats it.
i did this swap three years ago using the NA harness, and havnt had a issue yet!

u need:
ecu
boost/vac sensor
throttle cable
a driveshaft to go from tII tranny to NA rearend (found on mazdatrix)
and tII maf
...think thats it

 

Yup, I got all that. What has to be modified on n/a harness?

 

just the ends of the injector plugs, like the end of the harness u would plug into the injector.

other then that, everything else stayed the same

now s5 ENGINE to s4 body/harness very different story, must have s5 harness, ecu yadayada

the ecu number (n327 or whatever) must match map sensor, maf sensor

u will also want to ditch the NA fuel pump and get a walbro 255
the stock na will starve the tII engine

 

Cool, sounds pretty straight foward. Thanks alot!