In a message dated 4/20/2007 10:57:32 A.M. Eastern Daylight Time,
echristley@nc.rr.com writes:
Lynn, do
you have any dyno data that would correspond to the BSFC an
airplane would
use in cruise, ie extremely leaned? I'm guessing the
answer is, "No,
what would a racer do with that?", but it can't hurt to
ask.
I don't have anything like that, However, that same engine leans out on top
because carbs do that even with a bunch of tricks to help them stay rich.
So at 9,000 RPM we see .662 BSFC at 241.9 HP and A/F at 13.2, EGTs at 1583
and 1587. Not exactly lean, but getting there. Go to the "Nopistons" site
and look at dyno sheets. You may find one lean enough to give you an idea.
With a CD ignition system they can run much leaner, although the power and
EGT is going down for lack of fuel.
Lynn E. Hanover