DREYKO

i know it can be done but do you need the s5 ecu and wireing harness? will the s5 just plug in or not?

Icemark

or not...

Turbo, non turbo, either way it will require wiring modifications or engine modifications to put a S5 engine in a S4 car.

And unless you are going to a Turbo, over a non turbo or you have a blown motor, it is probably not worth the time and trouble you will be biting off by that swap.

boost_its_what_for_dinner

well im about to get a jspec t2 motor complete ecu tranny motor and uncut harness but i need to know what all has to be done to wire it up in a s4 non turbo and all the stuff that will nickel and dime ya to death. any help will be nice and no i dont wanna buy a turbo 2 for one there too high priced in mid tn and i like mine to much it great except for the motor is na and i have a fever but the only prescription is boost

Ayaka Machida

iTrader: (1)

actually im kind of interested in this as well. I have a 87 TII. I have a extra Turbo motor from a 91. I have the ECU and wiring harness for the S5 motor. If I were to say strip the motor down to the block, get it rebuild, would I be able to install it into my 87 TII w/o much hassle, or would there be some major modification I would have to do.

Thanks.

BuffDaddy915

The trouble all comes from the wiring. You need to re-wire EVERYTHING for the ECU and wiring harness. Good luck, have fun.

WonkoTheSane

iTrader: (2)

http://www.rotaryresurrection.com/ - Tech Section. .> That's pretty much all you need to know about this

Fire85GSLSE

iTrader: (29)

Wrong!
ok, S4 TII car trying to put in a S5 TII motor and harness.

It can be done and somewhat easy. There are two ways to do it.

S4TII car - remove entire engine, passenger side harness and ecu.

Use the s5 TII motor, ecu, and passerside harness.

Now here is where you will have a difference, The s4 TII dash/driver side harness is different so you can one pull it out and get you a s5 dash harness. It is alot of work but cheap if you have a jusk yard or look on e-bay. Or find you a s5 harness and cut about a foot from the pilg that plugs into the ecu. Then you can use the FSm's to splice this into the s4 harness. Before you cut anything make sure you can do it and understand how to do it. I would not cut off the s4 plug though incase you want to go back s4.

This way is only reccommended if you have all the s5 parts motor/ecu/harness/ etc laying there with a s4TII blown car. If not I would stick to keeping everything s4 wiring wise.

Good luck

NOPR

I'm in the middle of the EXACT same swap, heres the secret:




STANDALONE!

YearsOfDecay

The EASIEST way to do it is to pull out the old motor.... pull the wiring harness and ECU out, sell it on E-Bay and pop a Haltech or Microtech in that bad boy....... then you aint gotta worry about s5 s4 and all that happy horsepucky

Fire85GSLSE

iTrader: (29)

Yes, very true but like most of use 1st and 2nd gen owners we don't have money to drop on a standalone ecu. If we did we would probally be driving a 3rd gen instead.

WonkoTheSane

iTrader: (2)

I dunno, my standalone only cost about $200?

JeffRX7

I just finished this swap! just put an s5 in my s4tII. there's a little monkyin around you have to do, but its all rather easy, especially if you are eliminating emissions at the same time. had to swap the front cover(unless you wanna ditch the OMP and run premix), kept the s5 LIM and UIM, used the S4 TB, and spliced the injector plugs from the s5 onto my s4 harness, other than that, only ran into a couple little things, like the temp sender plug was different and needed to be spliced, and the knock sensor was in a different spot. any questions, just ask.

NOPR

3rd gens for $5000 where you live!? thats how much a t2 swap with a standalone is costing me... microtech lt8's can be had for about 800 new. if you have an s5 t2 engine, all of your sensors such as AFM, boost sensor, wiring harness, & ECU, can be sold for good money because S5 t2's are rare and you dont need any of that fun stuff anymore. The standalone nearly pays for itself, especially if you take out the price of a fuel cut defenser, boost controller, piggy back, s-afc, etc. Not to mention you can run a ton more boost since youll have full control and you'll save yourself a major S4/S5 headache. AND you can always resell it for 75% of what you paid for it (or buy one at that price and sell it at that same price later). but hey, if you wanna save money with stock ECU's thats cool too.

fc3stech

I searched and found this thread and wanted to reconfirm something, If I had a S4 TurboII and a extra S5 turbo engine, isnt it a straightforward job of just stripping everything off the S5 engine and putting on all the s4 components without any hassle and having it a S5 engine and turbo but with all s4 management, I remember this all being possible but wanted to hear again from the experienced

powrdby13B

If you have it all and it's intact.. why would you have to do anything fancy? Just put ALL the new parts in place of ALL the old parts.. and if you don't know how to do that, it might not be a good idea...

Alex Rodriguez

iTrader: (137)

i have a 91 T2 and my engine came off s4
u need to change ecu,harness,gauge cluster ,.....

fc3stech

I know how to do it all I am asking is if everything will line up, between S5 block and S4 block, if everything is interchangeble, such as oil metering pump all the sensors, WHY would they be different I dont know, that's why I am asking they do have differences you know other wise there wouldnt be different series. I am already using the turbo manifold, Oh and El Nene 7 I think you read my post wrong, I am asking about blocks I am not using the S5 harness or ecu just the block but thanks

DoriftoBoost

s4 n s5 blocks are the same but everything else is different, even the top mount intercoolers look the same but there are slight differences, the wiring is the tricky part u can still run the s4 ecu with the s5 but it will need some tinkering with. just had a s5 engine put in my s4 and it is well worth it. i can tell u.

rotaryhead7

im trying to do the same swap but i have an 88 na rx7. is it pretty much the same as swaping the s5 turbo engine into the s4 turbo car, or is their more work involved?

WonkoTheSane

iTrader: (2)

The rotary ressurection thread that I posted before walks you through engine swaps.. you can pretty quickly check for yourself what's involved with it, Rotaryhead7

Bounter

My car is a T2 -87 with an S5 engine and S5 turbo.
The ECU is still S4.
I dont know much more because im not the one that have done the swap.

dennis blackstone

Well this is what I did I had a gxl shell 1987. My parts list was as follows
1. 1987 ecu 332
2.1987 t2 harness
3.1987 t2 maf
4.1987 t2 pressure sensor 318
5.1987 tranny and rear end t2 driveshaft and halfshafts
6.1987 plenum
7.1987 exhaust intake
8.walboro fuel pump rewired
9.at first safc ,know wolf 3d
10.bnr turbo npr isuzu fmic
11. front cover for 1987 t2 gasket set
12.make sure you follow setting up timing marks or your seven will not start ,plus have a brand knew or fairley knew battery

rotaryhead7

i did check rotaryressurection and it dose not tell you how to put a s5 turbo engine into a non turbo s4 car. why do i have to have the left side harness when nothing from that harness plugs into the motor?

dennis blackstone

You do not need the left harness ,but when you hook up every thing when you start the car up all your idiot lights are going to stay on so what you do is trace the alternator wire to the ecu and find what pin it si via fsm because na and t2 harness are slightly differant plus you temp gauge will say hot best way is compare an na harness and you will see were the wires go I've been there done that,I learnt a lot from doing my own conversion and I'm still learning more any more questions were here to help

rotaryhead7

has any one here rewired the plug from the ecu to the body harness. if so will you please help. thier is 19 wires on the s5 plug and 25 wires on the s4 plug.