no less than 93 octane should be used and u can do a pass and check the
plugs for
color if they are tan all is good
N8N wrote:
> On Apr 30, 12:41 pm, spamTHIS...@[EMAIL PROTECTED]
wrote:
> > On Apr 30, 12:05 pm, Stan Weiss <srwe...@[EMAIL PROTECTED]
> wrote:
> >
> > > "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)
> >
> > I know a bit about cars, but not why the ?? about Al heads is
> > im****tant- is it the fact it's Al and not cast iron, or just that Al
> > heads are likely to be better engineered?
> >
> > Dave
>
> Aluminum heads shed heat to the cooling system better than do cast
> iron. You'd think that this would be a disadvantage, but in a high-
> compression engine, it helps to prevent detonation. I have heard as a
> rule of thumb that aluminum heads, all other factors being equal,
> allow you to safely run a half point more compression on the same
> octane fuel than do cast iron.
>
> nate
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