Forwarded: Header insulation

[RABBITT_Andrew at mv8.orbeng.com.au]

I can't imagine you'll get too many mpg's out of this exercise, since 
once the exhaust heat is out of the combustion chamber it can do no 
further useful work, whatever its temperature (unless you have a 
turbocharger).  It's just waste heat from the exhaust port onwards!

If you're concerned with the EGO sensor losing temperature, I can't 
see how it would except maybe after a prolonged idle period.

If you do gain anything in your BSFC, then you'll lose it from 
carrying the extra inertia of the insulation!

From: (michael glidewell) glide at shore.net:smtp
Date: ## 07/03/96 18:00 ##
I'd like too insulate my exhaust header down to the O2 sensor so it won't
cool off and get better gas mileage( that's my theory anyway) Does annyone
have a simple recommendation for something effective? I've thoght of the
asbestos muffler wrap stuff but I don't think it will retain the heat in
very well. This for an 81 528i BMW.
----------------------------------------------
Michael Glidewell       Boston, Massachusetts	glide at shore.net
KE1CP     BMW 528i      BMWCCA 		http://www.shore.net/~glide/