Correct A:F Ratio @ WOT?

[Bruce]

> Smokey Yunick once said that there's probably only a handful of guys in
the
> world that REALLY know how to read plugs... but any time you go to the
track
> everybody's got their opinion...

Ya, he was a hard case to teach, LOL

> i'd say, though, that the ideal tuning program varies hugely between and
> individual hot rodder and a racer... for example, last time i was at the
> dyno the operator was telling me how he has customers that come in and
> purposely blow their motors... they keep pushing it to find out what the
> limits are, then they rebuild it and back it off a bit...  personally, i'd
> kill myself if i blew up my brand new motor on the dyno... but i'm not
> trying to squeeze EVERY last hp out of it... i can make compromises for
> reliability...

You have to be willing to consider at least one engine a mule.
That's why engine choise can be such an issue.  One thing I really like on
the buick engines is that the head gasket is the fuse, so in getting my
limit close, I found that at 28 PSI on pump gas was the limit for the local
gas.  Knowing that, I have a rough guide for what is too much, boost wise
(OK timing, and injector wise).
Since it was so high (allowable boost) on the Headgasket R+R used a thinner
one, so I have a tad more CR.

tried experimenting with smoothing the chambers, and misc other stuff so as
long as I stay out of detonation I should be OK <g>...

There is some lee way on finding the absolute limit, with good diagnostics
you can sneek up real close to it (plug reading being considered
diagnostics).
Bruce






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