Fuel mix for my 69 Camaro L78

[Chevy454]

Cool...I never tried the lead stuff, just the "octane boost"...that's probably where I screwed up!

[Chevy454]

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Higher octane has a slower burn rate which will make more power

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Often times that's true, but not always! Octane is not directly related to burn speed...that is controlled by the chemistry (composition) of the fuel itself. For example: Maximal has one of the highest octane ratings of any fuel Sunoco makes (116 octane), but it's one of it's fastest burning fuels...they use it a lot in Pro Stock.

[Jeff Murphy]

I'm using the Sunoco Supreme Leaded 112. All I can get here in England -- at $19/gallon (for a 50 gal drum).

[camarojoe]

I haven't heard anyone mention Turbo-Blue racing gasoline... maybe it's not sold nationwide? I believe its 115 octane, and is sold "for off road use only" at a few places in my area. I don't know what its similar to thats already been mentioned... anyone else use this stuff? Was about 3.90 per gallon here this summer.

[NCGuy68]

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I've been using some of that Jack Podell lead/octane mix--car seems to like it--

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I use this too,and noticed a real diiference from before using it.I really like it.

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Been using it for a long time in vintage cars. Mess with spark plugs, timing and carb jets all you want. Theres' no substitute for a small dose of real Tetraethyl to wake up the car.

[Zedder]

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Zedder: something worth mentioning is that a lean condition can lead to pre-ignition and detonation...how good was the tune on that Z?

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I don't think so Chevy454...I couldn't tune a car to save my life, so I took it to a local Corvette guy that has a fairly good rep. He couldn't get the thing running where he wanted it and fiddled with the carb and timing for about 2 hours before getting it "the best he could". I suspect the carb and distributor needed freshening and that it was running the off-road cam - not the stock cam.

[Schonyenko2]

We run "blue". It's pretty good stuff. Not as good as VP, but better than Casy's. It will not fire in cold weather. You'll need to blend it if it's going to be below 40. Smells great.

[musclcar]

my sbc is a 70's performance build-up running 11.5:1 comp the old 140 flat tappet cam and edelbrock TM1 intake with a holley 850DP.it runs it's best with 14 inital 42 deg. total runing either 91 octane or mixed with VP C12 or socal 114 orange

[Chevy454]

I tend to prefer the purple...the blue seems to be a lot more noticable on the intake than the purple if any gets spilled on it while pulling the bowls...

[@wot]

VP fuel is synthetic and will not mix evenly with fossil based fuel. I have stopped using it in favor of Torco race fuel. My car needs a 50/50 mix to run properly with the most advance possible before detonation.