How much timing w/high boost?

[BUICKTR]

I have a TA 62 with 50 lb inj and stock unported heads (only valve spring upgrade) 212/212 cam, 20 row IC, 340 fuel pump, adj reg. I would like to turn it up around 25-26 lb of boost. Want to see some good e.t's. I will use C16 fuel at track. What is the realistic timing I should have in a race chip.

 

[TurboDave]

Depends a lot on the quality of fuel you get a hold of. My race trim has the timing set up to 27degrees, and I usually run 25# of boost. You'll have to watch for knock retard, and don't allow any.

My car won't run those numbers with C16, it detonates. I run Unocal 114 and all is perfect.