Identifying an S14 notch back/ S15 notch back

[Loomis112]

I have been searching endlessly for awnsers on how to identify between an s14 notchback and an s15 engine.

What is the difference and how do you identify it?

I know if you take off the vavle cover peice the s14 notch uses fat coil packs and the s15 uses skinny ones but are there any other ways to identify it?

[Danchamp]

If the tranny is there it will be 6 speed on a s15

[LuckyRPS13]

If it is a full motor set look at the ECU code, if it is a stock S15 motor look at the turbo, and fuel injectors. The fuel injectors will be a Brick Red color. other than that I believe they look the same.

[N3cronomicon]

S15 has fins on the head, l shaped coils and the ecu is shaped really oddly in comparison to the other sr.

Also will have bigger injectors and the larger turbo.

Other than that practically identical

[Kingtal0n]

S15 ecu is NQ or QT

S14 ecu is NA, or WC

S15 will have the red injectors. and they usually look cleaner :D

[Loomis112]

Thanks all

[S14DB]

S15 has fins on the head, l shaped coils and the ecu is shaped really oddly in comparison to the other sr.

Also will have bigger injectors and the larger turbo.

Other than that practically identical

S14 has fins also in the later years.
There were 5 speed S15's.

Coils, Fuel injectors, Turbo, Harness and ECU are ways to tell. As stated above.

[Def]

S14 SRs have igniters, S15s have the igniter built into the coils. S15 coils are also a much thinner diameter, so it's pretty obvious if you look at the coils or pull them.

[o2fst4uo]

I know slightly old but one more point

S14 non facelift throttle wheel bolts are a couple of millimetres wider than s14a and s15 ones

[Kingtal0n]

I know slightly old but one more point

S14 non facelift throttle wheel bolts are a couple of millimetres wider than s14a and s15 ones



:trogdor:

I am not even sure what that means, but you made me laugh. thank you :bowrofl:

[o2fst4uo]

:trogdor:

I am not even sure what that means, but you made me laugh. thank you :bowrofl:
Pretty self explanatory. On an s14 zenki the bolt holding the throttle wheel on is a couple of millimetres fatter than on a kouki or s15.

Kapish?

[Kingtal0n]

Pretty self explanatory. On an s14 zenki the bolt holding the throttle wheel on is a couple of millimetres fatter than on a kouki or s15.

Kapish?

how did anybody notice this? I think a picture would be awesome! And kouki = S14 so how does this help? It could be a 98 S14 kouki sr20 or a 99 S15 sr20, which does not help identify...

[o2fst4uo]

how did anybody notice this? I think a picture would be awesome! And kouki = S14
I bought an eccentric throttle wheel to put on my s15 spec s with an sr20det conversion, but had no idea about this fact. So when I went to put it on it wouldn't fit over the bolt. Emailed the manufacturer to slag them but they told me the difference so I had to file out the hole.

I know it doesn't distinguish between s14 kouki and s15 but if the bolt is the fatter version then it at least narrows it down to a zenki.

Just a little tid bit.

[eek]

S15 uses different coil packs (thinner if I remember correctly). S13 and S14 use the same coil packs and will not fit on a S15.