what power levels can the standard valve springs handle?

**EspenW** · 6 April 2009, 10:30

Originally posted by MrVain

This car has a stock head and 7A cams. Only harder valve springs.

Audi s2 "Nira i3" (1991)

http://www.garaget.org/?car=71679

Audi_Dannes bil Audi s2 "Nira i3" (1991)

It was on the PPF dyno last week and got 590 whp...

Awesome car in that link, but power measured at the hubs must never be confused with whp.
For example: the R35 GTR and 997TT both have "480" hp at the crank. They pull approx 460hp at the hubs, but barely crack 410whp on a proper loading dyno (Mustang, Dyno Dynamics, etc).

**Taagom** · 6 April 2009, 11:29

I dont have a AFR graph, but the wideband was showing around 11.5.

what power levels can the standard valve springs handle?

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