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  #1  
Old 03-18-2022, 10:12 AM
Welippisch Welippisch is offline
 
Join Date: Jan 2022
Location: Stuart, FL
Posts: 2
Default Hot #3 cylinder

Thanks in advance.

New to me 2005 build RV7 O360 - 785 hours. On take off, especially first flight of the day CHT goes up to 425 deg, 500 rpm, 17 gph FF. Subsequent flights are much better (relatively) about 400 deg. Cylinder 1,2,4 in the 350 - 380 range on take off. #3 goes to 380-390 at cruise.

The baffling seems OK About 1/2 inch drop from cowling on ramp. Its in 3 sections. I assume it flies up to seal with the upper cowling since there are marks on the cowling.

There appears to be 2 washer spacer at the rear shroud of the cylinder. Its riveted so additional space in is not really possible.

Any ideas on better air flow?
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  #2  
Old 03-18-2022, 10:24 AM
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turbo turbo is offline
 
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Location: Stuart, FL /Hartford, CT/Virgin Gorda,BVI
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Default

sounds normal to me. same as my 6.
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RV6-A 5,400+ hrs, R-44 1,700 hrs, Helicycle traded for 33 FFR coupe, 300 young eagles flown
Stuart, Fl / East Hampton,Ct / Virgin Gorda, BVI - villa sold.
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  #3  
Old 03-18-2022, 10:34 AM
Welippisch Welippisch is offline
 
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Location: Stuart, FL
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Turbo - Thanks - I’m your hangar neighbor, Ed
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  #4  
Old 03-18-2022, 11:31 AM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 7,293
Default

That big of a delta between 3 and the others (50-75*) is too much to be normal. Mostly likely scenario is poor baffling or something stuck in the fins like debris from a prior birds nest. If you have never built one of these, you may not be able to judge what baffling problems are.

Larry
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Last edited by lr172 : 03-18-2022 at 11:34 AM.
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  #5  
Old 03-18-2022, 08:02 PM
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pilotkms pilotkms is offline
 
Join Date: Mar 2007
Location: WARNER ROBINS, GA
Posts: 604
Default Baffle Mod

Read the BAFFLE MOD thread. Wirejock posted to it today, bringing good history forward.
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  #6  
Old 03-19-2022, 09:31 AM
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Marlonyoung Marlonyoung is offline
 
Join Date: Sep 2021
Location: Santa Rosa, CA
Posts: 37
Default Baffle

Yes, glad wirejock did post. Doing baffling now and The info especially from Dan was very helpful and informative. Great thread
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  #7  
Old 03-19-2022, 02:46 PM
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Quote:
Originally Posted by Welippisch View Post
Turbo - Thanks - Im your hangar neighbor, Ed
Hey Ed, was wondering who the new guy was. Congrats on your nice RV. Looks real nice. How do you like it?
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TURBO YES =VAF= Payed Jan2022
Ed D'Arcy
RV6-A 5,400+ hrs, R-44 1,700 hrs, Helicycle traded for 33 FFR coupe, 300 young eagles flown
Stuart, Fl / East Hampton,Ct / Virgin Gorda, BVI - villa sold.
VAF #840 EAA AOPA FAC FABA QB SPA
addicted pickle ball player
https://i.postimg.cc/tn3h4svg/IMG-3101.jpg
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