I have a S5 knight sport engine and the N374 Ecu, although the actual harness is for a RHD car can I just use the harness off a different S5 and be ok, or do I have to use the RHD harness for everything to work properly?

 

i would see if you can patch together the harness to work, or contact Rtek and see if the changing the EEPROM may allow the ECU to run the USDM harness.

otherwise you'll be stuck looking for a USDM harness and a N370 ECU which are pretty difficult to find.

 

Do you know any where that has pictures of the wire harness and engine bay of a RHD cause im setting it all together got the wires are bent need to be plugged in aaaand its wack haha. so im either missing something major or this harness is gonna be nuts to make work

 

i honestly have never dealt with a right hand drive car or have any of the schematics for one.

 

AWESOME lol

 

Don't waste your time trying to extend/patch up those old wires, most importers just cut the harness and leave everything plugged in to save on labor.

To answer your harness question:
Any S5 harness will work, I'm assuming this is a swap so use your S5 Non Turbo harness,
It will control your car fine, there are a few differences between turbo and non-turbo:
1. The Alternator wiring is on the body harness for an N/A Car, it is integrated within the Turbo car's Engine management harness.
2. Knock sensor wire is not on the non-turbo harness. (I've never read of issues with leaving this disconnected, if I remember correctly** the N370 ECU's knock sensing capability was incredibly poor)


The N374 is a different story. Some work, some don't like to inject fuel to the rear rotor.

People have seen consistently better results with the upgraded Panspeed/Knightsport/RE/etc ECUs

so you can plug everything in, test, and if not find a N370 OR ship it to Rtek for a 2.x upgrade (they don't do 1.x upgrades on the N374)

as far as pictures you can search a bit, but not many people here are factory RHD cars.

 

I have another s5 turbo harness and ecu would i be better off using that harness on this engine and N374 ecu?

 

I would use the USDM harness since you have one, I'm not sure if you have an N370 USDM ecu or not based on your last post but that would be the easiest way to do things.

You can use the N374 ecu on the usdm harness.

As for your other thread. I wouldn't bother with that black box that's been cut, it isn't used in the USDM harness.