Do i really have an s4 t2 motor on a s5 t2 car
03-12-06, 02:26 AM
#1
Do i really have an s4 t2 motor on a s5 t2 car
theres been a conflict between forum members that my engine is a s4 and some say its an s5 but with s4 parts..huh..lol
here i post a pic of my engine and pic of the little black piece next to the fcd
please help me find out what motor i have
maf-s4
dash gauges-s4
pressure sensor-n318
my car is a 91 t2...i think the people who owned it before me replace the engine with a s4 t2
here i post a pic of my engine and pic of the little black piece next to the fcd
please help me find out what motor i have
maf-s4
dash gauges-s4
pressure sensor-n318
my car is a 91 t2...i think the people who owned it before me replace the engine with a s4 t2
Last edited by Alex Rodriguez; 03-12-06 at 02:30 AM.
03-12-06, 02:28 AM
#2
Rotary Freak
Join Date: Mar 2001
Location: LA.,California USA
Posts: 1,611
Likes: 0
Received 0 Likes
on
0 Posts
S4 AFM and an FCD.. yep you might have an S4 engine there..check the oil metering pump if you see a rod that leads to the throttle body...if you see a rod then its really an S4..but from the AFM alone its a good sign that its an s4...
03-12-06, 02:52 AM
#4
Rotary Freak
Join Date: Mar 2001
Location: LA.,California USA
Posts: 1,611
Likes: 0
Received 0 Likes
on
0 Posts
it would take alot of work trying to make the S4 engine to work with S5 or vice versa..jst doing the rewire is a nighmare, most likely you have an S4 car...i think you can tell my VIN #....
03-12-06, 03:00 AM
#5
oh no my vin came out correct 91 t2 everything in my car is t2 the only thing is my engine, i am 100 sure that they switched everything due to no knowledge in engines
because when ever something happened to their 7s they would just tell their mech just make it work
because when ever something happened to their 7s they would just tell their mech just make it work
03-12-06, 03:37 AM
#6
Lives on the Forum
Someone went through a lot of trouble...
Next to the air filter is an Zenki fuel injector resistor pack.
Next to the boost sensor is a Zenki idle mixture control pot.
I would look under the passenger side kickpanel - do you see a lot of splicing?
If these guys ran all the Zenki wiring harnesses, it was a BIG job!
No way the VIN plate could've been swapped?
-Ted
Next to the air filter is an Zenki fuel injector resistor pack.
Next to the boost sensor is a Zenki idle mixture control pot.
I would look under the passenger side kickpanel - do you see a lot of splicing?
If these guys ran all the Zenki wiring harnesses, it was a BIG job!
No way the VIN plate could've been swapped?
-Ted
Trending Topics
03-12-06, 04:00 AM
#8
There are a lot of ways to tell, of course you have stated the obvious. AFM, Resistor Pack, OMP. Also you could look at the TB(throttle body) and see the TPS(throttle Position Sensor) S4=1 sensor, S5=2, Also the exhaust manifold on an S5 has four bolts in a rectangular pattern, S4 they arent square... one's slightly off square... mmmm, The oil and water lines to the turbo are diff too?...
I really don't see the problem with the s4, although I've HEARD that the s5 is a better motor, but I've also heard (merely here say) that their rotors crush under too much PSI... above 20ish... High comp rotor, and high boost = crushed rotors... Correct me if I'm wrong...
Just have fun with it, also you can get an RTEK if you want a little more juice out of the S4...(don't remember the ecu #)
I really don't see the problem with the s4, although I've HEARD that the s5 is a better motor, but I've also heard (merely here say) that their rotors crush under too much PSI... above 20ish... High comp rotor, and high boost = crushed rotors... Correct me if I'm wrong...
Just have fun with it, also you can get an RTEK if you want a little more juice out of the S4...(don't remember the ecu #)
03-12-06, 04:41 AM
#10
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
The EFI system appears to be 86-87.5, including the EFI harness (injector resistor pack, 4-pin MAF sensor, variable resistor). It's seems very unlikely that someone would go to all that effort with an S5. Even if you had to use an S4 engine in an S5 for some reason, it'd be easier to fit the existing S5 electrics to an S4 engine than to swap the whole harness and all the sensors for S4 ones. It seems far more likely that your car is in fact not a 91, but an 86-87.5 with S5 body panels and one rather dodgy previous owner... 
03-12-06, 09:22 AM
#13
Banzai Racing
Even the fuel pump relay has the round S4 connector instead of the square S5, this would mean they changed all the harnesses in the car.
In our "how-to's" we just put up a page for decoding your VIN, you might want to check it out. www.banzairacing.net
In our "how-to's" we just put up a page for decoding your VIN, you might want to check it out. www.banzairacing.net
03-12-06, 09:31 AM
#14
Rotary Apprentice
Join Date: Jan 2005
Location: USA
Posts: 2,181
Likes: 0
Received 0 Likes
on
0 Posts
is the knock sensor in the S4 or S5 spot? that could tell you whether your short block is S4 or S5. But, I think you're better off checking the chassis for things to tell you whether its an S4 or S5, like the lower control arms (s5 balljoints aren't detachable), sway bar end links (s5 are balljoint style and made of plastic). Also, how do you know they didnt switch from S5 n/a to S4 t2? that could make more sense.
03-12-06, 09:49 AM
#16
ROTARD FOR LIFE!!!
a way to settle this, if both rotor housings have NSU WANKLE stamped on them both, chances are its an s4, untill 88-89(im 85% sure) mazda didnt own the patitants to the wankle, so they were stamped with nsu wankle (i beleave above the MAZDA 13B imprint...)
03-12-06, 11:59 PM
#18
DGRRX
iTrader: (3)
Join Date: May 2002
Location: Murfreesboro TN
Posts: 2,243
Likes: 0
Received 0 Likes
on
0 Posts
Shouldn't the car have the VIN stamped onto the firewall next to the wiper motor, and not just the dash plate and door sticker??
I know mine does. That would have to be sanded down (not likely) or filled in with bondo to conceal.
I'm with the rest of the crew, too many signs of S4.
I know mine does. That would have to be sanded down (not likely) or filled in with bondo to conceal.
I'm with the rest of the crew, too many signs of S4.
03-13-06, 02:43 AM
#19
that has to be an early zenki with s5 TII VIN badges all over it...
no one in their right mind would do all that work to an s5 TII just to drop the value with a lesser engine. they would, on the other hand, pass an early s4 TII off as an s5 TII to jack the value up a couple thousand dollars
no one in their right mind would do all that work to an s5 TII just to drop the value with a lesser engine. they would, on the other hand, pass an early s4 TII off as an s5 TII to jack the value up a couple thousand dollars
03-13-06, 06:44 AM
#20
hey guys my parents looked up my vin since i am not near my car and also asked a local cop friend and ran it and it came out all clear
heres my vin
JM1FC331OMO903407
same numbers in the firewall,dash,and doorjam
i dont know why would they go through the problem to do this, well the car was female owned and the husband owned a 94 fd and 91 vert fc...they had money and just told their mech fix the problem
well thanks for helping guys...woohooo i got a 91 s5 t2 with a s4 t2 engine..lol soon 13bre so it doesnt matter anyways
heres my vin
JM1FC331OMO903407
same numbers in the firewall,dash,and doorjam
i dont know why would they go through the problem to do this, well the car was female owned and the husband owned a 94 fd and 91 vert fc...they had money and just told their mech fix the problem
well thanks for helping guys...woohooo i got a 91 s5 t2 with a s4 t2 engine..lol soon 13bre so it doesnt matter anyways
03-13-06, 12:46 PM
#23
Rotary Freak
iTrader: (10)
Join Date: Nov 2003
Location: Marysville, CA
Posts: 2,465
Likes: 0
Received 0 Likes
on
0 Posts
damn. you got a 91 coupe NA with a S4 engine. however did all that work was gay when they could of gotten s5 motor. Anyways, look on the bright side, any TII engine is better than a NA right?
