Hi all,

Just started the engine again, after having to modify the exhaust to clear the bodywork...

Was running the engine at about 2K (running in the new cam), and after about 5 minutes, I spotted that the wrapping on the exhaust (where the 3 & 4 pipes touch) was glowing red! Any ideas what might cause this?

wrong mixture?
wrong advance?
valve clearences?

all of the above?

The engine hasn't been properly tuned yet, but I wasn't expecting this kind of heat out of it!

It's a Pinto with 285 cam, GSXR throttle bodies and Megasquirt btw.

Thanks,


Vince

Running lean or retarded ignition can both give a glow to the exhaust.

i would check the ignition timing as i had the same problem on my v6,i recon the headers must have been nearly white hot under the wrap.my timing was miles off

If you have a timing light check that the ignition timing is advancing as it should. Not unknown for the advance /retard mechanism to sieze