11 to 1 - too much on CA 91 pump gas?

[Bernica]

I am running just under 11:1 comp in a Shelby aluminum block with Shelby aluminum heads and Stage II porting, 482ci. I'm here in CA, and the 76 station near my house still sells 100 octane pump race gas (unleaded). It's not cheap. Currently around $8.75/gal. But once I filled my Cobra with that stuff, all was good. Running around 35 deg timing. No knocks, no pings. Just an empty wallet after a 42 gal fillup!!

[RodKnock]

Originally Posted by Bernica

I am running just under 11:1 comp in a Shelby aluminum block with Shelby aluminum heads and Stage II porting, 482ci. I'm here in CA, and the 76 station near my house still sells 100 octane pump race gas (unleaded). It's not cheap. Currently around $8.75/gal. But once I filled my Cobra with that stuff, all was good. Running around 35 deg timing. No knocks, no pings. Just an empty wallet after a 42 gal fillup!!

So you're telling us that your CSX runs great with 11:1 compression and race gas. Cool.

[patrickt]

Originally Posted by RodKnock

So you're telling us that your CSX runs great with 11:1 compression and race gas. Cool.

... and a fill up costs him a little under 400 clams.

[RodKnock]

At our local station the Sunoco unleaded race gas cost is roughly twice the cost of 91 Supreme, around $6.50-ish.

You certainly don't need anywhere near 100% to be filled into the tank. With a 30 gallon gas tank in the Kirkham, I fill up my gas tank the earlier of: a) once a year or when I change my oil and filter.

[Bernica]

Originally Posted by RodKnock

So you're telling us that your CSX runs great with 11:1 compression and race gas. Cool.

I guess I could have written it better. My point was, prior to getting the 100 octane, I was trying to run 91. Dieseling, pings, pulling timing back etc. AFTER I put in the 100, yes, it was cool. Expensive, but cool. And a whole different "aroma" from the exhaust too. By the time I got home from filling it, my credit card company was calling the house to let me know that someone was using my card to fill a bunch of cars!! I had to explain that it's just me...

[SP01715]

Originally Posted by Bernica

I am running just under 11:1 comp in a Shelby aluminum block with Shelby aluminum heads and Stage II porting, 482ci. I'm here in CA, and the 76 station near my house still sells 100 octane pump race gas (unleaded). It's not cheap. Currently around $8.75/gal. But once I filled my Cobra with that stuff, all was good. Running around 35 deg timing. No knocks, no pings. Just an empty wallet after a 42 gal fillup!!

I wonder if this is CARB legal gas? The places down here in the San Diego area have been cracked down on, and alot of them wont even sell race gas anymore.

[RodKnock]

Originally Posted by SP01715

I wonder if this is CARB legal gas? The places down here in the San Diego area have been cracked down on, and alot of them wont even sell race gas anymore.

Yes, very legal.

Here's a thread about it with the actual link to the bulletin from the State:

http://clubcobra.com/forums/showthread.php?t=103392

[SP01715]

Originally Posted by RodKnock

Yes, very legal.

Here's a thread about it with the actual link to the bulletin from the State:

http://clubcobra.com/forums/showthread.php?t=103392

I know they make CARB legal high octane gas, I was just wondering if the stuff at this station is the CARB legal gas. There are no stations close to me that sell legal race gas, and the ones that were selling non legal race gas have pretty much stopped. I bought 10 gallons recently and had to provide my own cans and had to fill out two pages of paperwork. The places were looking the other way until recently.