What fuel to use????

[swebb]

Last year with a 13:1 motor we used C12. This year the engine will be at roughly 14:1 with a much more aggressive cam. Can we still use the C12? Or should C14 be used?

[misfit]

c 14 n/a c 16 on the bottle

[Pooch565]

Changing to C14 will bring you a little more insurance. That way if you put a bunch of timing in the engine or run a ton of RPM you won't detonate. I personally ran C12 in my 505BBC at 14 to 1 compression and 7000rpm in my bracket car. I never detonated once. If the C14 is available, and in your price range, I would go that route.

Thanks,
Jason

[swebb]

This is an N/A 347cui engine that will see 7500 RPM shifts and likely trap around 7700-7800 RPM if this helps.

[Pooch565]

I would put the C14 in it. This will give you all the detonation protection you need. Give you dealer a call and get some ordered up.

Thanks,
Jason