what size is the hot side of a stock turbo s4

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07-15-04, 09:37 PM

rotorracing

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what size is the hot side of a stock turbo s4

i just want to know the size of the stock s4 turbo (hot side) if any one know please tell me
thanx andy

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07-15-04, 09:42 PM

rotorracing

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if my friend was to put a 60-1 on his stock s4 motor do u think he would have a problem with spooling it?
the turbo is .84 hot side
and .70 intake side
thanx andy b.

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07-15-04, 10:02 PM

Wargasm

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It should spool up OK.

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07-19-04, 02:34 PM

BLUE TII

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I believe the Jack Yamaguchi book states the S4 dual scroll exhaust housing has a primary scroll A/R or .4 and a secondary scroll A/R of 1.0.

edit- and this is smaller than T4 sized housing so T4 A/R numbers do not coincide...