BuujinBejiita

iTrader: (4)

Hey everyone. Me and a friend pulled the n/a motor out of the gxl but I ran into a issue. I was undoing the exhaust and driveshaft while he pulled the harness. When I got to the hood I noticed all 4 injector clips were broke. I was hoping to re-use the N/A harness but dunno now. Which brings me to the question. I got a JDM full swap(engine, trans, harness, ecu) So can I just remove the whole n/a harness and plug in my turbo harness into the turbo ecu without modification? Im stumped thanks

RotaryRocket88

iTrader: (7)

No, cut the injector pig tails off of the turbo harness and splice them into the NA harness.

walken

iTrader: (6)

jdm harness is good for replacing all your old crusty plugs.

BuujinBejiita

iTrader: (4)

Damn ok thanks rotaryrocket youve been a huge life saver this whole time. But I just found another issue. While tearing down the motor for the rats nest removal I found a dreded site to see. I had asked earlier whats a sure fire way to tell the difference between s4 and s5 motors, someone said S4 has metal(alluminum) thermostat cover, and S5 has plastic, well whats this look like to you;



Which brings me to yet another question. I know I can swap a S5 motor, but what all is needed to make this motor work in my S4 car?

TwEaK

iTrader: (6)

take a pic of the front cover if its a manual OMP system its an S4 if its electronic its an S5....

HPI-R

So the S5 is a better JDM swap than the S4???

BuujinBejiita

iTrader: (4)

Ill go take a pic now but can you be more specific as to front cover?

BuujinBejiita

iTrader: (4)

Ok just went pic crazy cause its about this old mans bedtime lol. First pic is on my 88 n/a. Is that the OMP?




I thought I read somewhere a S5 shift **** is different then a S4 also;

BuujinBejiita

iTrader: (4)

BuujinBejiita

iTrader: (4)

Any and all help is mucho appreciated, thanks

Gaber

On first pic, I believe that is egr valve..

Chris Boots

Read my link in my signature, I covered most of what you need to know about putting an S5 in a S4 NA car. If I'm missing something in the "HOW-TO" or there's something you're unsure of, reply and I'll give you the answer.

By the way, that (I'm 90% sure) is a S5 engine. I think I saw a narrow and wide band TPS in the picture. The first picture is of the EGR, and judging by the last pictures I believe I see no OMP rod (S4) and instead an electric OMP (S5). Also S5 engines have high impedence injectors so double check your car for an injector resistor block located near the boost/pressure sensor. Before I re-write my how-to in this reply read my link and lemme know how your coming

clokker

iTrader: (2)

BB, that sure looks like a S5.

Look at the pivot mount for the alternator (cast into the top of the waterpump housing)...the S4 is shorter than the space between the alt mount legs and requires a spacer.
The S5 is wider and does not.

BuujinBejiita

iTrader: (4)

Hmm, well I guess I get to make the s5 to s4 swap :-D joy. If thats the egr whats the valve on the side of the uim? And you said to just re-use the n/a harness and put my tii harness injecotr plugs onto it. Well can I still adapt te n/a harness if I got a S5 motor in a S4 car?

RTRx7

iTrader: (2)

http://rotaryresurrection.com/2ndgen...o_s4_swap.html

Chris Boots

.... does anyone read the turbo swap threads? pr0x is right on the money with rotaryresurrection link, and mine also explains all this without question. Answer to your above question:

Not sure what "valve" you're talking about. As for the S4 harness on a S5 engine... possible. I believe if you use the right injectors for the plugs you have that will work, and then I think 3 of the TPS plug's wires are for wideband (similair to making a S6/FD UIM TPS working on a FC) so you'd be tapping into that OR better yet take a small screwdriver and remove your old S4 tps by bending the tangs holding it in and then transplant it onto the S5 UIM which is what I've done on many a RX7 swaps. If you're going without all the emmisions then think about removing and blocking off that EGR as well. I believe mazdatrix or mazdamart sells a kit for that if you dont wanna do it your self. Also where is your BAC? I know many people say "Take it off you can do without it" but in all honesty I like the ECU having a little control of my idle and giving it the ability to rebound if I bring the RPM's too low close to dying so thats your call. Your idle will be set by the screw on the back of the intake anyway so its not really needed for idle and the JDM BAC's don't even have a screw in them like US ones do. SO, the trans will also have slightly different plugs but they all are in the same place and do the same things. Does your radiator have a cap on it? If not you might be changing out your front of that engine for an S4 setup so you'd have S4 waterpump and thermo setup with the rad cap on the engine, and you might be Pre-Mixing your gas because the electric OMP i useless with a S4 and your NA front cover won't work cause it has no output for the turbo oil line. So premixing or finding a S4 turbo front cover is that option.
Either way its going to be a lot of work and I haven't even mentioned how you're going to adapt a turbo trans to your NA rear end and your options there. So as I said in my How-to thread in my signiture "Its a lot of work but well worth it"

BuujinBejiita

iTrader: (4)

Holy crap I just got lost. I read your faq, but as it states is for a S4 swap not a S5. I read the rotary resurection and its talking about using S5 parts on a S4 block from what I get out of it. I will just re use my tps on the non-turbo S4 if it will work on my turbo S5. As for emissions I am removing it all, I already have a block off plate set. Theres a EGR valve(i believe) on the side of my S4 N/A. The Air pump was routed to it and a pipe went from it to the exhaust after the cats. My new S5 Turbo motor had the same setup, maybe this isnt the egr, its more to do with the smog pump.

Please dont think Im not reading your faq, I have read it many times. Just that its for a S4 not a S5 wanted to make sure I would be able to re-use the S4 N/A on my S5 Turbo.

BuujinBejiita

iTrader: (4)

Things you MUST keep
(originally on the old engine, which plugs into the car) are:

•• Throttle body with TPS
•• Oil metering pump and front cover
•• Wiring harness with fuel injectors
•• ecu
•• airflow meter
•• water pump housing, water pump, fan


So I got a S4 ECU, other then that I will need all new TII S4 parts? What can I salvage off my S4 N/A if anything?

TwEaK

iTrader: (6)

you CANNOT use the S4 na ECU on a turbo motor you need to purcahse a Turbo ECU
TwEaK

RotaryRocket88

iTrader: (7)

To do na S4/S5 hybrid swap (S5 keg w/ S4 electronics) you will need:

S4 TII ECU N332/333
S4 TII Boost sensor
S4 TII AFM
S4 TII TB & TPS
S4 TII BAC
S4 TII Front cover and mechanical OMP
S4 TII Water pump housing & temp sensor (may be able to convert the S5 TII version)

I think that's everything. With all of these things, you'll basically be back to doing an S4 to S4 swap. The only things S5 will be the keg, manifolds and turbo.

BuujinBejiita

iTrader: (4)

Sorry, I do have a S4 Turbo ECU, as well as a S5 turbo ecu now...Ok so a few questions, if I dont keep the BAC, I obviously do not need this right? I got the S4 AFM already...need the boost sensor and tb/tps. If I remove the OMP do I still need to swap front covers? Sorry guys please work with me. If you have any of the parts I need laying or or for sell please pm me.

And on a side note, I am planning to do standalone in the very near future. If I do this can I just run all the S5 crap in the S4 car? Im thinking just doing it now might offset some of the price of the rest of the little things I need.

TwEaK

iTrader: (6)

you will still need to switch to S4 front cover.. and yes if you go with a standalone you can use ALL the s5 stuff and not worry about swapping anything....

PM me ill buy the S4 ecu off you let me know need one badly
TwEaK

RotaryRocket88

iTrader: (7)

If you remove the OMP and premix, the S4 TII front cover isn't needed. This also means you could keep the S5 TII water pump housing, as long as you use a compatible temperature sender on it. I think the S5 version uses a different plug, so you might just cut it off and splice it in place of the S4 connector on your NA harness.

You really shouldn't remove the BAC either. You could keep the S5 one if you cut the plug off and splice similar to what I mentioned above. And if you want to clean up the setup, just remove the coolant passage from the BAC, and route the hose under the UIM to the rear iron or thermowax.

And yes, if you run a standalone most of those have their own harness. This would mean you could use all S5 electronics.

BuujinBejiita

iTrader: (4)

I shoulda done a LS1....ok whats BAC anyways was just gunna remove all this crap. Its Bypase Air Control right? Isnt that where it runs hot coolant through the throttle body?

RotaryRocket88

iTrader: (7)

Uh, no. The thermowax has coolant pass through it, which bumps up cold idle until the engine warms.

The BAC has a coolant passage that can be unscrewed from the solenoid body, but it's just there to keep a steady temperature. It's overkill, and functions properly w/out it. The BAC directs air into the intake to stabilize idle speed. A/C, P/S, electrical load, etc... can all drop idle speed, so the BAC is what the ECU uses to compensate. Without it, you'll be more prone to stalling.