loud motor = happy motor?

[Greg Hermann]

 You simply cannot achieve any sort of vacuum to run the advance,
>so in reality, you are revving the motor with retarded timing. Ignition timing
>is a factor dictated by today's gasoline. You simply cannot run the amount of
>ignition advance today that you used to 10 to 20 years ago. The "more is
>better" rule also does not apply.

More knowlege as to how to design chamber shape and turbulence has at least
as much, and likely a whole lot more to do with this than fuel!! I have
built engines which would run with no ping at 12 to 14 degrees MORE advance
that what made best power! (Lotsa squish, very short flame travel, central
plug.)


You can easily go too far, and lose
>performance

See above statement.

Regards, Greg