New problem: melt down after shut down. That turbo
has a lot of very hot mass. I flow enough air through the cowl when
running to keep things cool. Right after shut down the cowl is just luke
warm to the touch. But 5 min after shutting down the turbo side of the
cowl is too hot to touch on the top and I can smell resin. It gets
a little soft to tap on it and it is starting to look a little mottled
and maybe yellow (if I let my immagineation run away). I have seen a
couple of RVs with drop down hatches in the top cowl to let heat out after
shut down. Does anyone have an idea about how hot I can let the
fiberglass get? Bright Ideas?
Hi
Dave;
When I first began to run with the cowl on, I
experienced the same issue after shutdown, however it created an issue with my
creative air intake, which is located directly above the turbo (pic
attached). The after-shutdown heat soak caused the trapped air inside the foam
to expand, severely blistering the intake (It looked awful). I drilled a few
small holes through the inside of the cowl into the inside of the inlet duct
foam to release the air pressure and it went back to close to original
size/shape. After a few cold nights it had completely gone back to shape and
I've not seen it expand again after shutdown.
Hopefully that will be the end of it as I don't feel like
redoing it. The inside of the cowl does have a very slight brown tint to it as
well. I may follow Ed's lead and put a little heavy aluminium foil on it.
So I wouldn't get overly concerned about it. Of coarse your California OAT may
be enough to make a difference. A hot day in Canada would be a cold day for
you :-)
S. Todd Bartrim (going
purple)
Turbo 13B RV-9Endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm
"Whatever you vividly imagine, Ardently desire, Sincerely
believe in, Enthusiastically act upon, Must inevitably come to pass".