Cylinders running too hot

When they are that far off at an idle it's usually an intake manifold issue. Most times it gets amplified with RPM but I have seen some stuff that had wacky distribution at idle that cleaned up as RPM went up.

If you are going to really sort it out it should go on the dyno.

Also, I could be nuttier than a jar of goobers and it could just be a tuning issue.

I've been wrong before.

That "at idle" statement has me thinking about that from last night.
It seems that intake may very well have an erratic dispersal at low RPM's that could clear up at higher RPM's
I have never seen that, but I never dealt with large plenum intakes either.



exhaust ports are not siamese
THis is not an Olds or Pontiac or Cad or flathead

I think he meant like this with no cooling between them, and is also why I thought it might be higher temps in the center pipes.

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