Underbonnet heat, what to insulate

[tvr4ever]

A friend of mine advised me to insulate the air flow meter with some heat resistant material. He workes at a company that makes compressors and gave me a so called "turbo sleeve" it's used in Lister Petter turbo engines to insulate the turbo heat. Must be good to keep the temperature of the air flow meter within limits. I'm now wondering what more needs/could/should be insulated. I've read posts about insulating the starter engine, what's next ?

Any suggestions / ideas ?

Cheers Fred

[simpo one]

New one on me. Maybe the airflow meter is a problem on Lister Petter turbo engines? The usual TVR defence, if you feel one is needed, is exhaust wrap, eg from Demon Tweeks. You'll find threads on this if you do a search. As I understand it the usual comonent to suffer from excess heat is the starter motor. Less importantly, the silver lining fixed to the underside of the bonnet can also become detached.

Having said that, all is fine in my '97 Griff though I try to pop the bonnet after significant runs, just to let the worst out.

[GreenV8S]

tvr4ever said:

A friend of mine advised me to insulate the air flow meter with some heat resistant material. He workes at a company that makes compressors and gave me a so called "turbo sleeve" it's used in Lister Petter turbo engines to insulate the turbo heat. Must be good to keep the temperature of the air flow meter within limits. I'm now wondering what more needs/could/should be insulated. I've read posts about insulating the starter engine, what's next ? Any suggestions / ideas ? Cheers Fred

Keeping heat away from the fuel and air feeds will improve power, so lag the the air inlet duct (not just the meter) and the fuel rails. Also helps cool the engine bay as a whole if you lag the exhaust headers. Starter motor, alternator and steering column UJs are quite close to the exhaust headers and suffer from heat stress (even if you lag the headers) and they will last longer if you insulate them.