On Apr 12, 9:21*am, Neal Fulco wrote:
On Apr 11, 9:40*am, et wrote:





On Apr 10, 6:26*pm, Ron Wanttaja wrote:

Peter Dohm wrote:
"cavelamb" ""cavelamb\"@ X earthlink.net" wrote in message
Come on, guys!
How hot do you think the intake air can be and still have the motor run???

I was really wondering about that as well--and also doubting the required
strength...

The air doesn't stick around long enough to GET hot...it's moving past
in a hurry. *However, the plenum is in direct mechanical contact with
the hot parts of the engine. *The airflow will help cool it, but
there're still parts in direct contact.

Ron Wanttaja

We're not talking about a composite heat muff? * Are we? * Surely,
we're talking about the part that directs air into the carb?

Ed

Right, we're talking about the plenum itself, not the muff. *The only
part that will contact anything on the engine will be the flange that
attaches to the carb. *It will be a few inches away from the exhaust
manifold so that is a concern also. *I even thought of making the
basic structure out of thin aluminum, wrapping that with fiberfrax,
(the thin stuff you usually sandwich between the stainless and plywood
on a composite construction) and then glassing over that. * Sounds
labor intensive, but seeing the work needed for fitting, riveting, etc
that is needed for an all aluminum structure, it's really not that
more involved.

Neal- Hide quoted text -

- Show quoted text -

Neal

If you have room, you might consider a heat shield attached to the
exhaust pipe. I ran the exhaust out the side with the coolant air,
so my lower cowl is relatively cool. No exhaust pipes to heat things
up.

Ed