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Old 08-30-2008, 04:06 AM   #1
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What Turbo do I have?

Sorry for the noob question, but I recently got a 1998 S14 with an aftermarket turbo on it, except I'm not quite sure what it is. I can't really take a good look at it without taking it apart since it's a bottom mount. All I know that it's either an HKS GT-SS (similar to GT28RS) or HKS GT-RS (GT2871R). I don't know the characteristics of either turbo, all I know is that the GT-RS is bigger.

Currently it reaches full boost (14.5 psi) at about 4000-4500rpm and it's been dynoed on a Dynojet with 250whp. It has stock internals, an HKS intercooler, exhaust and intake and an URAS manifold, uppipe and downpipe.

Based on this information alone, what turbo do you guys think it might be?
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Old 08-30-2008, 06:27 AM   #2
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if you could take a pic of the front housing we will have a better idea.
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Old 08-30-2008, 09:27 AM   #3
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These are the best pictures I can take. I hope you guys can judge by the size of the turbo relative to everything else (?). For what it's worth, I can only get the part number of the actuator, which is 17230-015100.





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Old 08-30-2008, 10:14 AM   #4
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Not an expert but sounds like a good old GT28R.
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Old 08-30-2008, 12:00 PM   #5
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Yeah 250whp @ 14 psi its a Stock T28
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Old 08-30-2008, 01:15 PM   #6
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If you hit 14.5 psi at 4000-5000rpm it sure as hell is nothing close to a gt28rs... I have one and ill hit that by lil over 3000rpm, so i would say t28.
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Old 08-30-2008, 07:07 PM   #7
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Thanks guys. I figured it was probably something close to stock rather than the GT-RS the previous owner was claiming.
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