Thanks, Cory

(Apologies for the delay, spent last week on jury duty.)

What type of CHT probes?

Bayonet-style, not the spark plug type.


The other indirect reading of fuel flow will be the EGT. How much lower =
than
high-power cruise peak is it on full-rich takeoff?

Less than the 200=B0 you mention. Peak EGTs while leaning are perhaps
200=B0 above climb-out EGTs, but I have been advised to run 125=B0 rich
of peak by my mechanic. At 50=B0 lean of peak the exhaust pipe has a
light grey appearance that suggests a too-lean mixture.


Probably not getting more than 5-10hp out of it. Of course, all that assu=
mes
the tuned exhaust actually works... ;-)

Well, all I can say is that I noticed the difference after installing
it. But to be fair, it wasn't a very scientific experiment because I
also installed an O-360 and a c/s prop at the same time. Those three
items conspire together to make it a real hot rod, among elderly C-172s
at least. Too bad the aerodynamics resemble that of a 1978 Volvo 240DL.