Digi7ech

iTrader: (1)

^NA and TII TPS's are identical within series.

dawicka2

http://mazdatrix.com/86-92Electrical-Engine.htm

oops....... we are both wrong

john ny

FC_fan

iTrader: (2)

alright, whats all this then? they seem to be the same for TII and N/A on a S4 but there are 2 different ones for the S5 N/A and then the S5 TII.

so NOW lets see if I got this right:
S4 TII longblock
S4 TII tranny
S4 TII driveshaft
S4 TII rear diff
S4 TII rear half shafts
S4 TPS (remember, S4 are same N/A or TII)
S4 TII boost sensor
S4 TII BAC
S4 TII AFM
S4 TII ECU
S4 N/A harness with pwr steering pin deepened/cut (re-using my harness)
S5 turbo
S5 manifold
Boost gauge
wideband O2 sensor
TII exhaust or cat-back
New clutch, upgrading. any suggestions?

new questions:
1. someone mentioned porting the waste gate? can't I just get an aftermarket one? do they have them that are better flowing for our cars? also, what about the manifold, could I get a better aftermarket one too?

2. I have no idea what boost creep is. I assume its when the turbo starts adding more boost pressure then it should be?no? please explain whats up with that. at some point I will be getting a piggyback EMS and having it tuned professionally. but that won't be for a little bit I'm sure. I just want to get the engine swapped and running reliably at this time.

3. so will the S5 PD bolt right up to the S4 and will the S4 ECU control it correctly?

Fortitude

Good material and thread

FC_fan

iTrader: (2)

this is a lot of good info guys, keep it coming.
I would especially like to thank Digi7ech and dawicka2 for all there help and back and forth here. I feel like I almost have all the answers I need. almost...

I don't remember finding a sticky saying that you could use an N/A harness for a TII swap. mods should make note of that someone should put this in the FC FAQ if it's not already there. I may have missed it,idk.

Digi7ech

iTrader: (1)

1. There are no external gates for stock turbos. Only upgrade is grinding the stock one out. No aftermarket manifolds for stock turbos.

2.you've got it. The wastegate can't keep up and it overspins the turbo.
Going aftermarket turbo will substantially increase the cost and difficulty of your swap. Turbo + exhaust manifold plus intercooler is well over $1500.
A mid level upgrade would be a BNR turbo. They are stock turbo's reworked with bigger compressor housings/etc.
EMS will mean you need some one to tune the car which can be troublesome and can lead to blown motors and lots of bugs to work out.

Just get the car running stock first and you'll be much happier as the list of problems dwindle.

3. The S5 FPD is built into the primary fuel rail and can't be taken out. Thus it won't leak like the S4 can.

Also, A wideband O2 sensor is good for tuning and initial testing but after that it's pointless to leave in the car. The wideband sensors have a short life span so using it sparingly will save you cash.

1coolmazda

iTrader: (7)

I was wondering will a s5 NA engine wiring harness work for a s5 TII motor. If so what needs modified so it will work.

Thanks

RotarySupra

iTrader: (-1)

i got a question about the s4 NA harness. i have a s4 t2 with a cut engine harness,so im looking to use a NA harness on it. i dont understand the deepened pin part or cut ? since the car is an actual t2,is this gonna be any easier or any harder? thanks and great thread and info.

wvumtnbkr

Yep!

I am running an S4 TII Driveshaft to my NA rearend. You just have to get the mounting holes redrilled in the flange and thats it! You don't even have to get it rebalanced, because it is hub-centric.

As far as the impedence goes, you could use either. You just need to make sure you are either using the resister pack or not.

Hope this clarifies.

Digi7ech

iTrader: (1)

You would use the TII harness. What your doing in these conversions is keeping the MOST applicable harness and doing the least modification.

If your chassis is TII then the TII interior harness will mesh best with the TII EFI harness and Vice Versa with the NA chassis.

Simple answer is find a new TII harness. Otherwise pull out the FSM and compare the pin-outs of the EFI harness/X15/X16/FEM harness to the NA versions.

dawicka2

Ok, driveshaft redrill i havent read about, but i thought the legnth was too short?

I only mentioned injectors so the op knew there was a difference. When buying the engine from a reputable source, its asier to just get the correct imp injectors with the engine initially, that will save him from ******* with the resistor pack.

Damn..... driveshaft thing ******* my world up a bit. I just installed an act stage 3 na clutch in my na trans backing my t2 because i didnt want to buy a t2 trans, new clutch, and 400 dollar mazdatrix driveshaft. Will do more research, but kinda regret that now.

My fault, back to the harness info........

john ny

FC_fan

iTrader: (2)

hey guys, don't forget you can sell the stuff you are taking off! If you have a spare car for a while, you can sell, say the N/A tranny, and use that to fund some of the new one. If you don't have spare wheels, you can sell stuff after and kinda replenish your savings account. mind you, I wouldn't think the N/A driveline would fetch much but it is something rather then nothing...

Definately think about going to the TII driveline guys. its worth it from what I have heard. It's just plain beefier so you don't have to worry about an axle snapping or your diff teeth disappearing. thats if you beat on your car though. but why would you be swapping if you weren't going to drive the hell out of it?lol.

I might sell some RX stuff off before I start buying things whether I sell my impreza or not. If I sell, I am buying another subie but cheaper and better MPG. mine gets like 19mpg cause of that 2.5 and it's N/A the money not used for the new car will go toward the RX. either way I have a spare car. I may take and sell the whole RX N/A engine and tranny along with the rearend since I'm upgrading. My RX needs a clutch anyway too, throw outs starting to grind and its just barely starting to slip. not a big slip...yet.

I messed up my subies control arm and endlink in the front(got lucky, thats all I broke) back at the end of november. got those parts on the way but now I'm driving my RX with half gone all seasons on the rear and summers up front in this vermont winter. needless to say, from most dead stops I don't have an option but to drift it diagonally for a bit until I get going.lol. I get looks from people who I guess can't figure out I don't have traction but it's getting me to work and back so who cares.

Digi7ech

iTrader: (1)

I drove on the NA rearend for a couple years before I went to full TII driveline. I used the mazdatrix DS.