i have a question about JDM S5 turbo swapping it into the S4 model. I bought a complete JDM S5 Turbo w/ harness, ECU will it direct fit into the S4 model? Do i have to change the JDM harness into the USDM one to make it work? Or do i have to swap everything from the S4 onto the S5 engine to make it work? Also how to i wire the key ignition onto the S5 harness to make it start?

 

It'll be easier to use the S4 wiring, injectors and all the sensors. Basically just use the S5 block, you will have to change front cover.

 

I would like to use all of the S5 turbo stuff is it possible? what do i have to modify?

 

I'm not sure how much wiring it takes to run an S5 ecu in an S4, but i know its alot.

You can run the S5 turbo/manifold with no problems.

 

Sell the ECU and loom. Using S5 electronics in an S4 will make the swap much harder. Using a RHD loom in a LHD will make the swap much harder. Doing both is sheer lunacy.

Keep the S5 intake manifold and turbo/manifold set-up, but use an S4 TII EFI system (ECU, loom, injectors, sensors). If you want a functional OMP you'll need to use an S4 TII front cover and TB.

 

i just got done finishing this swap and what u need is an s4t2 usdm harness, injectors for that harness, s4t2 ecu, s4t2 throttle body, s4t2 front cover, and s4 omp...and everything else is straight swap...

 

Connecting the stuff back to the cars wiring harness is the hard part. Boost is different on an S4 and S5 so you will run into issues there along with who knows what else if you try to ghetto rig it, so go with the S5 ECU or go with a standalone. Or you could just drop that engine in and use a S4 Throttle body on it and hope you get it to work.

 

i forgot to mention u use the s4 boost sensor and the s4t2 afm if you use the s4t2 harness...go look at rotaryresurrection.com...i fallowed waht he said and it worked....

 

is it possible to use all s5 turbo stuff in a s4 model? cuz if i'm using all the old s4 stuff then why bother to buy a s5 jdm motor right. i bought a complete swap, like i said, full jdm motor, w/ harness, sensors, ECU. is should just be a direct swap all i need is to extend the harness make it fit. am i right?

 

get rid of the harnesses all together, and the ECU and get your self a standalone system and just be done with it. Thats what I will be doing. Still trying to decide which one to go with, i was going to do the haltech but it requires a PC with DOS for tuning from what I can gather. I was looking at some other's that will run on windows based PC's. Seems to be the way to go. But you do whatever you want. The engine management just seems to be a very small price to pay for the options you will have.

But yes other than extending the wires you should be fine. I would imagine the interior under the dash connections may not match up. Especially since that is all s4.

 

+1

Just get a standalone system. Things will be cleaner, and the advantages should be obvious. That part is expensive though... if you do decide to go Haltech, Check out the Haltech section of this site, and contact one of the vendors...(cough CLAUDIO, cough...)

The E8 runs off Windows, for what it's worth. I am using Windows XP to work with mine. I plan on getting Vista in a few weeks, and dual-booting both OS's and seeing if Halwin is compatible with Vista.

James

 

u could either go to what there saying on top about standalone but if u dont want to listen to me about using the s4t2 harness then u will end going through all the bullshit wiring for the s5 harness to fit with the s4....u could of gone with the s4t2 motor to make it a straight drop in but instead u got an s5 just like me and that is y im telling u what i had to go through....

 

You should learn a little more about the differences between S4's and S5's before offering any more advice like that. Boost is a complete non-issue because the S5's higher boost is purely from the ECU-controlled electronic boost control. There is little advantage in using the S5 ECU and harness but there is a lot more work in adapting it to an S4. There is nothing "ghetto" about using the S4 system, it will make the job much more of a drop-in and will work fine. Trying to install the S5 system is far more likely to turn into a half-baked hack job.

You can use all off the S5 hardware, which means you get a motor with a few internal improvements, and a better intake manifold and turbo. There is no advantage to it being JDM though. Much of the S5's extra 18hp came from higher boost, which you'll get anyway unless you use a stock exhaust.

No, electrically it's not even close to a direct swap. I hope that's not what the seller told you. Like I said above, when it comes to the EFI systems the S4 is very different to S5 and RHD is very different to LHD. I know you probably don't want to hear this now, but buying a complete S4 package would've made this job a lot easier. All you'd need to get then would be a LHD harness.

This gets spat out way too often. "Just get a standalone", because you know they're so cheap and just drop right in right? So far we're only talking about swapping in a standard motor, which hardly justfies the extra work and cost of a standalone. It doesn't really clean much up either, since you're just replacing one harness with another. The only significant change is the missing AFM.

 

You'd have to make changes to the series five EM harness where it mates with the Front harness of the series four. You'd do that by comparing the pinouts of the series four and series five EM harnesses and the pinouts of the plugs that mate with the series four Front harness.

I'm saying that the series five EM harness won't just plug into the series four Front harness. Whatever. It can/could be done but I've yet to see someone write up the pinouts/adjustments for novices. Well, I take that back. There was a fellow from the Czech Republic that did something like that. A friend of Higgi's. Can't remember the name right now. Something like Lucius with a $ sign in front of his name.

If I had a series five engine/turbo/transmission...............I'd use a series four ECU and the EM harness that is presently in the car. It's so much easier. Even then you'd have to make some minor harness adjustments. Plus a series four boost/pressure sensor/afm/stuff. I'd premix til I found a series four front cover as far as the omp goes. I'd NEVER premix on a permanent basis. EVER.

A engine is an engine. Four plugs, afm, boost sensor, four injectors, water thermo sensor, airintake sensor and all located in the same ole place. That's my broad view of series four and five engines.