Ok my friend got a GSR motor and didnt get the right harness he got an LS harness and i got a 93 civic Ex harness what is the differance between the LS and GSR or GSR and EX?

 

ummm as long as there the same obd, i believe the difference from gsr to ls is just going to be vtec wiring, and the diff. between ex and gsr is maybe just a knock sensor wire, not much as long as they are all the same obd, best bet would be to remove the secondary butterflys in the IM then just add a knock sensor wire to the ex harness....

 

the LS is obd 0 the GSR is obd 2 the EX is obd 1 and the car is set up for obd 0.
so we were thinking of running the pr4 ecu and adding a vtech contruller on a togal switch.
would this work

 

what about secondary butterflies on the gsr. convert to obd1 and run uberdata