89NCFC3S

iTrader: (3)

Hey guys, I've had all my answers found except for a few using the search function. I've pulled out the s5 NA 13b from my 89 GXL and have the harness unhooked. My plan is to reuse the NA rotors in a s5 turbo irons/housing setup, aviation seals, etc. As you will see in the pics attached, the PO was a retard twisting wiring harness connections to the ECU.

Question 1. Can I solder these connections and re-use the harness? Many other places at the connectors look the same.

2. Will this NA harness work with the new s5 turbo sensors, etc. I know there will be minor modifications needed, i've just seen details about high impedance harnesses?

3. Can i send my NA ECU out and get RTEK programmed to make it run and adjust timing/fuel etc?

4. Will NA coil packs create enough spark for a turbo engine?

Due to how particular i am with projects, I might just purchase another harness. And in this case, should i just go ahead and find (if i can) a turbo harness? will that still work on a NA RTEK ECU? Thanks in advance!

Landon303

iTrader: (25)

Nice wiring!!! top notch to the old owner.

1) yes

2) yes, use S5 T2 injectors, they're the same plug/impedance wise

3) Run a T2 ECU (N370?)

4) All coil packs are N326.

un#'d ?: Just repair that one, check continuity. It's easier to use an NA harness converted over to a T2 engine.

Read this: Rotary Resurrection home of the budget rebuild.

Aaron Cake

iTrader: (1)

Based on the other questions, it sounds like you want to turbocharge the engine. Don't use those rotors. Compression is too high to be reliable.


Sure, as long as the rest of the harness isn't butchered. Solder, clean off all flux, and seal up with adhesive lined heat shrink.

Yes but you'll have to swap many of the connectors. So the harness will end up hacked even more.

Yes, but you'd want to use a TII ECU and have that RTek'd. Still though, you won't get near as much adjustment as you need to keep the car reliable. You really should be looking at a full standalone, which eliminate the harness issues as well.

Same part.

Again, I would caution you greatly about using the S5 NA rotors. They are a full 1.7 points higher on compression than the S4 TII rotors. You'll be building a lot of heat under boost and will need to run aux injection, a far more efficient turbo than stock (or keep the boost down), a big intercooler and very little timing with overly rich AF ratios to keep things reliable. And even then, few of these S5 NA-turbo engines seem to last very long.

Andre Fung

iTrader: (1)

Nice pics and good info thanks a lot.