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SU HS6 (Pair) 140-160

posted by  B20Paul. on  Tue Aug 30 16:10 CST 2022
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last visit: Mon Oct 20 10:54 CST 2014
[RELATED]

So you have 46/36mm Valves?

Cam is not a problem but could be better. Problem with the Volvo head is poor exhaust flow & porting the exhaust actually requires Volvo experience. If he IS a good porter, the inlet will be fine, but be worse inlet/exhaust flow ratio. With high compression, you go bigger on the exhaust. Going back to 220° on the inlet & going as much as 240 on the exhaust would have got you where you needed to go.

Valve springs are?

The Mikunis are insanely oversize. One of them would flow as much as the two HS6's combined. Have you noticed any power loss compared with the carbies changed back to Stock?





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