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I believe the S1.5 has the S2 turbo in it. But as far as i'm aware it doesnt really matter if you have the nylon or ceramic they will both fall apart once boost is increased to 12 or more PSI.

Its kind of the luck of the draw. I'm personally running 12PSI on a 95 S1.5 (spikes out to 1 bar sometimes as im using a bleed valve not a boost controller as such) and have been for some months with no issues.

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I ran a series 1 turbo @ 18psi for bout 18months on my old rb20. Never had a probably. when i pulled the turbo off it seemed happy lol. little bit of oil, minimal shaft play still and no weird bearing noises or anything. Probably luck though.

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What makes you say that? Quite obviously there is... cause I own one. It has heaps of S2 features/parts that S1's never had.
I'm with you, there is an "in between model" I recently wrecked a S1.5 it wasnt a S2, it had S1 front end and other distinguishing features to the S1, S2 airbag wheel, S2 afm, and more, all origonal, anyways off topic Edited by madaz R33
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