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Old 09-16-2018, 09:21 PM
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DanH DanH is offline
Join Date: Oct 2005
Location: 08A
Posts: 8,201

Originally Posted by tgmillso View Post
The difference between the full rich EGT and the peak EGT for cylinders 1, 2, 3 and 4 were 180, 180, 195 and 180degF respectively.

The relationship between delivered mixture and delta-to-peak is entirely reliable. You're right around 0.085 F/A, or 11.75 to 1 air-fuel, richer than max power. You can plot it yourself on the charts posted previously:

Or there are charts like this one, an oldie from Lycoming:

Spend your effort working on baffling and sealing.
Dan Horton
Barrett IO-390
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