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12-02-2009 09:56 PM #1
CHR Member
- Join Date
- Sep 2004
- Location
- Pahrump
- Car Year, Make, Model: '32 Ford 3 Window Coupe w/ 392 Hemi
- Posts
- 916
Figuring octane when mixing fuel.
Hi Everyone, I hope everyone is doing well. My '32 Ford with a blown 392 Hemi in it is pinging. The instructions that came with the motor {Big Al's Toy Box motor} said to run 94 octane fuel but the best that is locally available at the pump is 91 octane {I'm in Calif}. I'm want to get 100 octane fuel to mix with the 91 but would like to know how much 100 octane I need to mix with 91 octane to get 94 octane. I have a GMC 8:71 on it with 10 pounds of boost. Also in the future I will probablly switch the pulleys so I have 15 pounds of boost. Is 94 octane enough for 15 pounds of boost? If not, how much octane will I need? {Also I was going to use aviation fuel}. THANKS
, Bill
Last edited by billlsbird; 12-02-2009 at 10:02 PM.
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