I Bought an 88 Rx-7, it had a 13b non turbo blown engine so I replaced with 13b single turbo engine, both are S4, the turbo engine is an 1987, I purchased engine from Japan and when the engine arrived the wire harness was cut and it was the last engine they had in stock that would fit my car, I am looking for instructions to take old wire harness and splice harnesses together to make it into a turbo wire harness for the current engine, Has anyone every done this and if you have please help!!!!!!!!!!!!

 

Please read the 2nd gen FAQ sticky. Threads like the one in my sig. (https://www.rx7club.com/2nd-gen-archive-72/s4-na-turbo-swap-details-813825/) cover turbo swaps.

You don't need to splice anything together. The cut J-spec harness is junk. Retain the existing NA harness, and make the minor modifications required for use with a TII engine.

 

Is the driver side wire harness the same for na or turbo

 

That depends on what harness you're talking about. There are 2 on the driver-side of the engine: the engine harness, and the front harness.

 

Engine harness and on the tran

 

Same with the exception of the alternator plug. The TII harness has this plug on the engine harness, while NAs have it on the emissions harness. This is why people that insist on using a TII emissions harness on turbo swaps have to run all new wires to the alternator.

 

It would be easy if I could find the TII wire harness

 

No, it's easier to just use the NA harness in most cases.

 

With 4 post you can't see my sig, so here's the link I have in it: https://www.rx7club.com/showthread.php?t=813825. There is more in the 2nd gen FAQ.