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-   -   Octane, timing, etc. on hot 2.7 (http://forums.pelicanparts.com/911-engine-rebuilding-forum/659382-octane-timing-etc-hot-2-7-a.html)

Todd Simpson 02-19-2012 03:11 PM
Octane, timing, etc. on hot 2.7
 
I'm finishing up an install on a single plug, 10.5 to 1, weber carbed 2.7 from a reputable builder. Race gas is in my future, and the car will be 90% track.

Right now timing is 30 degrees BTDC at 6000 rpm.

What process would you follow to further dial in the timing? Or just leave it there?

Flat6pac 02-19-2012 04:35 PM
Todd, You should be able to go as far as 35 to 38BTDC. Hot fuel and a good spark will keep the fire stable. Put some miles on it, move it up to 35 before you rev it tight.
Bruce

Steve@Rennsport 02-19-2012 10:44 PM
As an addendum to Bruce's comments, I'd recommend keeping 30 degrees until 100% race gas is in the fuel tank.


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