n0ferz

iTrader: (4)

Hi there, Can you tell from these 2 pictures of this engine if it is a s5 turbo2 engine ?

Thanks

Emir-

arghx

iTrader: (3)

that's an s5 AFM in the 2nd pic

RTRx7

iTrader: (2)

Get a picture of the MOP.

arghx

iTrader: (3)

looks like an s5 UIM as well. 95% chance it started life as an s5 engine

n0ferz

iTrader: (4)

I will get more pictures on the weekend thats when I will go back to the shop, thanks guys.

K-Tune

iTrader: (26)

yep S5. you can see the OMP plugs and the plastic thermostat neck.


though i think S5 used a plastic bypass valve pipe instead of cast aluminum like the S4.

j9fd3s

iTrader: (3)

all the stuff on TOP of the engine is S5, which means nothing

RotaryRocket88

iTrader: (7)

And that's an N318 MAP sensor, which is S4 TII, so who knows what someone did to this car. The S5 TII MAP sensor is part number N370.

n0ferz

iTrader: (4)

I noticed the N318 MAP Sensor....I will take more pictures so we get a better view of the engine and can determine for sure what series it is

rx-7 obsessed

im thinkin s4 if you look closly at what is left of the rats nest plug (looks liek emissions have been removed) you see a grey plug which looks plugged in...i know that for a fact that grey plug is for the s4 twin scroll valve as well

edit...wait it does not looked plugged in but do s5 motors have that many plugs for the rats nest becuase i was sure there was one less on s5

RotaryRocket88

iTrader: (7)

The 3 plugs you see hanging there are the FPR, relief and switching solenoid plugs. They are orange, blue & gray on all FCs.

This looks like a j-spec S5 engine, but it's not possible to tell for sure from the pictures. I spy an S5 UIM, S5 intercooler, S5 AFM, S5 alternator, S5 thermostat cover, and S4 MAP sensor. Everything else could be S4 or S5, so who knows.

Banzai-Racing

iTrader: (11)

Look above the T1 spark plug, see if there is a knock sensor. Above the T2 spark plug should be a tapped hole. This will at least tell you if you have a S5 housings. Problem is you can never tell what is inside the engine without cracking it open. All the engine peripherals are S5 and the UIM, LIM and IC are all J-spec.

n0ferz

iTrader: (4)

Thanks for all the inputs guys, I will check the engine this saturday and snap more pictures of it

AmviciousRav

iTrader: (5)

that's a s5 turbo motor I believe

JustJeff

iTrader: (13)

+1 UIM and IC are J-spec

n0ferz

iTrader: (4)

Alright guys, here a few more pictures. It looks like housings are s4? So maybe its a mix between s5 j-specs parts and s4 housings? can you guys tell if the turbo is s4 or s5?

Thanks

K-Tune

iTrader: (26)

hard to tell from that angle, the exhaust turbine is where the difference between S4 and S5 turbos comes to be.

All that nastey RTV on the intake and exhaust flanges is a good indicator that someone has been messing with the motor...

I see S5 tps and secondary fuel rail, S4 rotor housings,

n0ferz

iTrader: (4)

So I guess everything is s5 except the housings???

RotaryRocket88

iTrader: (7)

That's an S4 turbocharger. The turbine side is smaller in the wastegate region, it has a twin scroll actuator on the manifold & there is no hookup on the compressor for an S5 turbo duty solenoid. Also, judging from the ribs on that transmission case, it might be S4 as well. My S4 TII transmission looks just like that, but my S5 TII transmission has 2x as many ribs. You can check the transmission crossmembers to be sure.

Banzai-Racing

iTrader: (11)

I agree that is is an S4 Turbo and manifold

Another thing to look at is the water temp sending unit. If it is a bullet style connector it is an S4 , which means it is an S4 iron as the hole is smaller, spade style is S5.

coolmike711

iTrader: (7)

S4 housings, S4 turbo,S5 AFM. I see a S5 alternator. Definately a mix of both on that engine.

n0ferz

iTrader: (4)

so a good upgrade on this engine would be to swap the turbo and manifold with a s5 one??

RotaryRocket88

iTrader: (7)

Yes, the S5 turbo is superior all around to the S4 turbo with a functional twin scroll system. https://www.rx7club.com/showpost.php...55&postcount=2

And in your case, you would need an S4 ECU and twin scroll solenoid to control that actuator. An S4 turbo without the twin scroll system has even worse low-end.

coolmike711

iTrader: (7)

Can you guys tell me what series housing this is from this picture?

n0ferz

iTrader: (4)

This is a Series 5 housing