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Dont forget however that 200rwkw in an s15 6 speed feels a shitload faster than in an r33!

If your thinking about one and dont need the extra space of the Skyline id definatly go for it! Aslong as its not an s14, s14a and s15s are the better looking cars.

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I'd put it in the 180rwkW region with those mods, at around 1bar.

The injectors and pump won't be maxed out, but they'll be close. For safety's sake you'd get a new pump and injectors before trying to screw out any more power.

The T28 will clear 200rwkW with cams.

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Aussie S15 T28's all ball bearing? This means with support mods they can hold say 17 psi safely?

I thought the JDM s15s were the ball bearing ones. Like the spec Rs or something. Have a look a nissan silvia they have a heap of dyno threads.

About your question i reckon what everyone else has said around 180- 200rwkw.

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Aussie S15 T28's all ball bearing?

No, they're not.

I believe the consensus is that the JDM S15s are all BB, but its pot luck as to whether the Australian ones are or not. Silvia owners have compared build dates, VIN numbers, part numbers for the turbo, and there's nothing they can see that differentiates between them.

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Exhaust housings... as im on NS.com all the time this is where i got that from.

B/B units have a 6 bolt exhaust housing while the non b/b turbos have 4? Maybe 5.

Not 100% sure on the non b/b units but they dont have as many bolts in the exhaust housings, this as well as a slight difference in the part number does show Aus Spec s15s have non b/b units!

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Well yes, if you look at them you can tell the difference.

But if you're in the market for buying one you won't be able to tell from the build date or VIN number.

From the people I've spoken to on SilNSW and NSCC the part numbers for Au S15 BB and non BB T28s are identical (hence why a VIN number search is fruitless).

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first of all - which 200sx you talking about?

those mods on an S14 or S14A will get about 180rwkw.

same mods on the S15's tend to get closer to 190rwkw.

my series 1 S14 with 1 bar boost, fmic, SAFC pulled 175rwkw.

ran a lazy 13.8 with heavy 17 inch wheels.

A mate with an S15 and 193rwkw using PFC and 17 psi ran 12.9 on the same night.

on the topic of BB turbo's and shit.

it doesn't mean anything for it to be AUS or JAP spec.

some had Ball Bearing and some didn't.

only way to tell is from the GARRETT part numbers on the stamp which is on a plate on the turbo between the front and rear wheels.

466541 = ball bearing

466543 = bush bearing

the second part of the numbers mean

-001 = S14 turbo (no splitter between wastegate and turbine exit)

-002 = S15 turbo (splitter between wastegate and turbine exit)

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Scathing -

yeh that would be Brentons right?

I think he had in the region of 225 rwkw with a lot of other mods apart from the turbo.

the original question was using "highish boost"

which doesn't mean much really.

So to "me", the stock setup runing 7psi of boost, "highish" would be double and a little more..

so I'd say that 17psi is highish for a stock turbo.

The example I gave of my mate that ran the 12.9 was using 17.5 psi boost on his stock S15 turbo.

Scathing, if you are the same scathing on other forums, then you'll know Dale.

and I think that night you were hitting 14 flat in the tree fiddy... if that is you..

his other mods at the time were.

stock dump, then 3 inch back.

hyperflow intercooler with silicon hosing.

AVCR

GFB hybrid bov

17x7.5 rims with Dunlop DJ-01's

Power FC

stock clutch

stock pump

stock injectors

stock fuel pressure.

stock turbo... etc

I don't think the difference between the BB and non BB is not so much power but the driveability.

I would "ASSUME" that the BB turbo would build boost at a faster rate.

I guess they have other bonuses like higher tolerances to extra boost maybe but I can't say from experience.

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