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Bump out

rwarre

Well Known Member
Was having trouble with high CHT on #3 cylinder with my newly rebuilt engine, so decided to try making a bump out on the firewall side of the baffle. i got the pictures from another builder so thanks for that. The bump out worked, cylinder CHT dropped and all is good so far.
 
What does it look like? I can’t visualize it from your description. Can you post the pictures?
How much higher temperature did your cylinder 3 have? Are there a different “bump outs” sizes for different temperature adjustments needed?
 
Picture

The pic that gary put on is what I followed. I was able to drop the temp by about 25 degrees
 
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