Re: 13-1/2 to 1 compression ...on the street?

"M.Burns" wrote:
> 
> Looking at a nice Pro Street car with 13.5 to 1 compression pistons.  It
> apparently has been at some statewide cruises, rod runs, etc, so I know
it's
> been driven. My question is, what kind of fuel must the owner be running
for
> the engine to survive. Heard claim that by retarding the timing
somewhat,
> pump gas with octane booster works(?)  Race fuel?  Any ideas  (...from
guys
> familiar with similar cars or situations). Thanks

Cast iron or aluminum heads?
Camshaft spec.'s
Carb or EFI
What might also help is what is the cranking compression of the engine
(Do a Compression Test)