On Mon, 10 Dec 2007 23:17:23 +0000, Scott
wrote:

Like I said, MIGHT OK, if there is no difference in heat, what are
the 100 octane valves in my A-65 for? Or more generally, why do they
sell 100 octane valves for A-65s and C-85s, etc. that were certified on
80 octane??? Like I said, I use them, I don't wrench on 'em

Scott

It has to do with the difference in lead content from what I have
gathered. 100LL has a LOT of lead, and an A65 will get "morning
sickness" quite early in it's life if run on 100LL with standard
valves without agressive leaning.


Bob Fry wrote:
"Scott" == Scott writes:


Scott One thing I think "might" be a concern is that burning
Scott 100LL (can't get 80 octane avgas these days) in an engine
Scott built for 80 octane is the extra heat.

Eh? Where's this "extra heat" come from? There is no practical unit
energy difference between different octane fuels.


--
Posted via a free Usenet account from http://www.teranews.com