Reply to "Compression ratio"

bosswrenchMember

I'd guess that staying below 10:1 would be safe from pinging on 91 octane for most street 351-Cs. The SVO hydraulic flat-tappet cam is not very big (I use one myself) so its not much help reducing internal pumping pressure. Depending on your patience with fiddling, some octane boosters do some good, as does access to aviation fuel or racing gas, but this situation is far too close to becoming an addict to recommend as a normal fix for too-high compression.

1/15/0311:41 AM

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