2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Whats the A/R on the stock S5 turbo?

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Old Nov 8, 2006 | 07:41 PM
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Whats the A/R on the stock S5 turbo?

The Hitachi HT18 correct? Whats the exhaust A/R? Anyone know?
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Old Nov 8, 2006 | 08:57 PM
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1.0 A/R seems to ring a bell.
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Old Nov 8, 2006 | 11:24 PM
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seeing as i'm looking at a hybrid on my desk here, i'm gonna say .96
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Old Nov 9, 2006 | 06:56 AM
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Originally Posted by jdmsuper7
seeing as i'm looking at a hybrid on my desk here, i'm gonna say .96
Awesome, thanks!
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Old Nov 9, 2006 | 11:45 PM
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Both S4 and S5 turbos have a combined A/R of 1.0. For the S4 the small scroll is 0.4 and the big scroll is 0.6. For the S5 they're both 0.5.
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