swap question...can not find the right answer
 

Alright so here's the deal, I want to do a S5 13B-T engine into an 86 S4

I've looked and looked and nothing I've found has helped me

I do not want to use anything from the old engine, I'm not using just an S5 core. The S5 engine I'm getting will have everything on the engine (sensors,pumps etc...)

Every time I look for information regarding the swap it says "Keep XYZ from the S4 engine"

Like I said I'm dropping a complete 89-91 13B-T engine into a 86 N/A Chassis, not trying to Frankenstein this shit

So what's required?

To the best of my knowledge a new driveshaft/diff, but does that mean I'll need new axles? I've heard someone sells an adapter for the stock S4 Driveshaft to go into the S5 tranny.

I've heard the wiring is extremely hard to do? Why is that anyways? For the gauges can't I buy an S5 Gauge cluster and swap that out with the old one?

Lastly, if anyone's around the Colorado Springs area and wants to help out, I can throw a couple bucks your way.

The first obstacle is the electric OMP used by series five and can only be controlled by a series five ECU.

Which brings up the second obstacle, the series five ECU will not connect to the series four wiring.

Series four ECU does not controll the OMP.

I won't hogg this whole thread and let others reply to this common thread. Search using the second generation SEARCH engine. Bye.

And, no, the series four and five combination meters are not interchangable. Wiring is too different. See online wiring for series four and compare to series five.

Couldn't I just buy one of those block off plates and premix?
I'll have the entire S5 harness and ECU so it's a matter of replacing the old with the new isn't it?

This is a rediculous question. This is covered in the FAQ.. I dont usually tell people to "search" but damn.

1- you can make this really hard on yourself and swap out a s5 body harness, engine harness, ecu, blah blah... And then it will be a plug and play. (as far as dropping in an s5 into an s4)

You say not frankenstiening the car, but that is the only way to put an engine in the car that doesn't belong without fully swapping the body harness etc..

Hard to answer about your rear end and axle question, but I assume you have an N/A which is why you dont want to make it easy and keep the s4 T2 parts (I assume you are looking at a jspec engine- which also has it's own challanges with the wiring etc) SHort answer- No you dont HAVE to do anything to the rear end.. It's a choice of if you want to. The driveshaft will need to be swapped with a T2 to N/A shaft if you keep the stock rear.

Ugg..

NO. The s5 must have OMP plugged in to run. ALso NO on the ECU just plugging in.. Look at my post above.

if you say the S5 must have the OMP plugged in to run how do they go about using the front cover's and omp's of S4's since they are mechanically driven?

Plug in the omp and hang it to the side..... The ECU must see the OMP as funtional.

You are confused. You don't know enough to understand the answers to the questions you are asking.

If the S5 ECU is used, it must electrically see the OMP. You can hang it off to the side (but that sounds like 'Frankenstein shit'), or leave it installed. Have fun with all the harness swaps-that is pure 'Frankenstein shit' as far as I am concerned.

If you are going to use the S4 ECU, you can block off the OMP and premix. Sounds like 'Frankenstein shit' to me.

If you are going to replace the front cover with the S4 front cover, then it still sounds like 'Frankenstein shit'.

Have you taken a look at the S4 and S5 wiring diagrams? I'm guessing no because they're very different. Using S4 TII sensors, S4 front cover, converted S4 NA EM harness and a S4 TII ECU is 100x easier than splicing the shit out of things or swapping every harness on the car.

If by "entire S5 harness" you mean what comes with an imported J-spec engine, that would be a useless RHD emissions (EM) harness. It's too short for LHD use, so you'll need a US-spec S5 TII EM harness, front (F) harness, engine (E) harness, instrument cluster (I or IC) harness, rear (R) harness, and possibly even the door harnesses to do what you're talking about.

The point of using S4 front cover is to use the mechanical MOP since the S5 ECU/MOP/sensor/wiring would be gone.