Thanks for the reply. Sorry for the delay in answering. I was referencing an earlier exhaust gas temp measurement on a Chevy LS V8. The correct temp at idle is around 450 degrees. Because I'm starting the six for the first time in about 5+ years, I'm repeating my V8 habits even though this engine has no injectors. I was alarmed at 700 degree siamese port exhaust temps and found the timing retarded a little. Advancing the timing corrected all temps cooler but the siamese ports are still warmer than the single ports . I had a hunch this is normal but just wanted a dedicated inline six cylinder answer. Without the fancy tool, we would check and correct the timing without knowledge of the exhaust gas temps. Thanks for the reply stock49.
