[jim..]

Just finished building a six cylinder engine,am in the break in stage right now.

It was running too hot,so I checked the timing and it was at 0,reset it to 10 degrees and now it runs cooler,does this sound right?

What causes it to run hot if retarded,I always thought too much advance caused more heat.

[hotrodf1]

I had a SBC set up with the timing too far retarded and it burned the ceramic coating on my headers. It would seem that the mixture is still burning a little as it exits the chamber but I dunno.

Have read somewhere that advance the timing can help it run cooler! But I think that would only be to a certain point, depending on the cam and C/R the engine has.

Anyhow, your scenario sounds about right to me! Good luck with the break-in.

[jim..]

Thanks for the input,at least I didn't burn my newly coated headers,still,I wonder about the dynamics of timing causing overheating,I was sure someone here would know,guess I'll have to search the net to find out exactly what causes it.

[docvette]

Doc here,

Just a guess, But how about burning the fuel off before it has a chance to cool..like running too lean..seems logical.

Doc