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  #1  
Old 12-28-2020, 12:18 PM
rwarre rwarre is offline
 
Join Date: Jul 2007
Location: Wray, Co
Posts: 601
Default Bump out

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.
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  #2  
Old 12-28-2020, 03:48 PM
plehrke's Avatar
plehrke plehrke is offline
 
Join Date: Sep 2006
Location: Defiance, MO
Posts: 1,740
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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?
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  #3  
Old 12-28-2020, 04:54 PM
gmkonrad gmkonrad is offline
 
Join Date: Feb 2005
Location: Howell,MI
Posts: 140
Default Bump out

I believe this is the bump out for #3 cylinder that RWARRE is referring to.
I put one on my -7 when making the baffles. NO hot #3 CHT. It works.
Photo credit to BillL.
https://lh3.googleusercontent.com/-T...2/IMG_1547.jpg

Gary
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  #4  
Old 12-28-2020, 05:03 PM
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Mike S Mike S is offline
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Location: Dayton Airpark, NV A34
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Maybe this??

https://vansairforce.net/community/s...ad.php?t=37835
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  #5  
Old 12-28-2020, 05:36 PM
rwarre rwarre is offline
 
Join Date: Jul 2007
Location: Wray, Co
Posts: 601
Default 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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