Can I use pump gas?

[kyhunting]

I would like to save some money on the race weekend. Can I switch from race gas to 92 pump gas?

Calculated Compression Ratio: Chamber=67cc, Dome=22cc, Bore=90mm, Stroke=70.4, Deck=1.25mm. = 9.5:1 Compression Ratio.

Twin Plugged.
500ft above sea level
28 degrees total timing
DC60 cams
Weber 40's - Mains 160 & AC 160, 36mm Vent.
36 intake & 32 exh. ports

Thanks...

[EBS_Don]

9.5:1 with twin plug is practically over kill! 92 octane will not be a problem.