BlackZenkiS14

Pics aren't showing. Got nothing here

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-Kyle

jr_ss

Cotbu, if he was dropping at 6k, I'd have no problem conceding and saying your right, but he is saying he's losing 5psi at redline(7k) which is typical of a small turbo designed for response and not high rpm flow.

Now if he was losing 5psi at 6k, then yes he has an issue else where, which I would point my finger at the wastegate actuator being pushed open due to a weak spring/diaphragm. He doesn't have the fancy Greddy which controls gain and the other stuff, so I really can't see he setup having flaws in it.

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My SR20VET

cotbu

Maybe I just expect more. He dropping 3psi by 7500rpm, all I'm saying is he shouldn't be. If his bov was leaking could that be a cause for the 3psi drop by red line? SURE!
I know this turbo, and It can hold 18psi to red line, why his doesn't IDK The boost controller, was only an example of where the problem lies, or could lay. Boost leak test are important!
His boost shouldn't start dropping at 6k is more of what I meant!

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LoverTechnologies "Half Broken Things!"

BlackZenkiS14

Ok, we'll let me put some more accurate info up. I went out and did some WOT 2nd gear pulls.

It hits and holds 17/18psi no problem, and it actually only drops to 15psi by 7600rpm. So that's not a big deal really, guess I don't care lol

I was on public roads, so I didn't want to do any 3rd or 4th gear pulls in suburbia. Not sure how much difference it makes.

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-Kyle

jr_ss

Well then what the hell Kyle...

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My SR20VET

BlackZenkiS14

I must have just been lifting, or maybe in 4th gear when it was dropping off the other day. Fawk lol

Or secretly hoping someone would have a good argument for going external waste gate lol, and I'd have a reasonable excuse for getting one haha

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-Kyle

jr_ss

Not worth it on your turbo. If you upgrade to the GTX, then you should go EWG.

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My SR20VET

Tom N

Any plans on putting the car on a dyno with the new S3 cams?

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98 240sx w/ S15 SR20DET, T2 20g, 11.22 @ 124.98

BlackZenkiS14

Oh absolutely.

Now I just gotta decide if its worth it to go to the 2867 over the 2871 and maybe even consider gtx2863

Time to read the 2867 thread lol

And no, no real plans to dyno. I don't care lol it makes what it makes. Power numbers don't interest me, just as long as it is reliable, fun and fast.

And I'm nervous about seeing numbers and wanting to push it harder to reach some power goal for the sake of having a sheet of paper. Haha

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-Kyle

Tom N

I was more thinking you might put it on the dyno just to see if the cams did anything for you running the stock T28. More importantly how they effected the whole power band not just a peak number.

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98 240sx w/ S15 SR20DET, T2 20g, 11.22 @ 124.98

Croustibat

No, they are, like, identical. S14 t28bb and s15 spec R t28bb even have the same serial number. And the non BB version also has the same turbine and compressor wheels, and the same turbine and compressor flange.

None can boost higher because they just are the same. Stop believing internet mumbo jumbo and check for facts yourself ...

jr_ss

It's a known fact the S14 turbo does not have an iconel exhaust wheel and the S15 does. That makes them different.

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My SR20VET

BlackZenkiS14

Well that would have been a cool idea, exception never dynod this car lol ever.

I've actually never had any car on a dyno, in 8 years of running SRs haha

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-Kyle

Croustibat

Dude, i dont care about the inconel wheel or whatever marketing nonsense; they will make the same power, because they have the exact same geometry, thats physics for you. An inconel wheel might whithstand higher temps, but that really is a non issue here ...

jr_ss

It's not marketing nonsense... However, since you like to argue, you win, K pumpkin?

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My SR20VET