RE: racing fuel

The compression ratio is 13:1. That's why my engine needs high octane fuel.
As Ron says though, this engine may very well not need as high as 115 octane
fuel.

I have just bought five gallons of VP C12 (108 octane) to try- the local
shop charged me $5.75 per gallon. I can buy the Turbo Blue fuel at $4.95 a
gallon- that's what is in the Sprite now...

Jacques Le clainche, 1960 Sprite

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///  (If they are dupes, this trailer may also catch them.)