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  #1  
Old 11-30-2016, 03:52 PM
Tiger 74's Avatar
Tiger 74 Tiger 74 is offline
 
Join Date: Oct 2012
Location: Chichester, UK
Posts: 36
Default Hot CHTs?

Got hot CHTs?
Fit these, they lowered my CHTs by 30 degrees with no noticeable loss of speed and look **** sexy too!!
http://s58.photobucket.com/user/dont...tml?sort=3&o=7
http://s58.photobucket.com/user/dont...tml?sort=3&o=6
http://s58.photobucket.com/user/dont...tml?sort=3&o=5
http://s58.photobucket.com/user/dont...tml?sort=3&o=4
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  #2  
Old 11-30-2016, 04:36 PM
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DanH DanH is offline
 
Join Date: Oct 2005
Location: 08A
Posts: 8,011
Default

Quote:
Originally Posted by Tiger 74 View Post
they lowered my CHTs by 30 degrees with no noticeable loss of speed
Lowered 30 from what original temperature, at what OAT?
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RV-8 SS
Barrett IO-390
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  #3  
Old 11-30-2016, 04:47 PM
g zero g zero is offline
 
Join Date: Jun 2007
Location: palm coast fl.
Posts: 945
Default CHT

Dan do you ever feel that you are beating a dead horse when it comes to high CHT's and Hot Oil ? You have a lot of patience 😩
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  #4  
Old 11-30-2016, 05:23 PM
Marc Bourget Marc Bourget is offline
 
Join Date: Apr 2009
Location: Stockton, California
Posts: 185
Default

Fell like he's beating a dead horse ???

Maybe if he had a God Complex.


Good Guys value themselves on how they can help others be the best that they can be. I see this in Dan by the effort he expends and the intellect he lends to those tasks.

Way to go, DanH !!
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  #5  
Old 11-30-2016, 06:31 PM
g zero g zero is offline
 
Join Date: Jun 2007
Location: palm coast fl.
Posts: 945
Default CHT

Dan definitely knows how cooling works . And he definetly cringes at bandaid cooling fixes like louvers.
I'm just surprised he doesn't get tired of trying to educate builders that do the same stuff over and over .
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Last edited by scrollF4 : 11-30-2016 at 06:46 PM. Reason: Keeping it civil
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  #6  
Old 11-30-2016, 10:15 PM
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Tiger 74 Tiger 74 is offline
 
Join Date: Oct 2012
Location: Chichester, UK
Posts: 36
Default

Thanks for the friendly words guys! Sorry if I have offended the purists!
CHT temps were up around 410-415 F oil up to 210 in climb.
Have Showplanes cowl, 10:1 Pistons on a Superior IO360, James plenum chamber (modified to fit and seal properly), standard Vans oil cooler.
OAT was around 70F at the time of testing.
P-Mags were set to 25c.
Everything looked to be set up right, but the temps were too high.
I added the louvres to get the problem solved during flight testing to get the permit to fly.
It worked. CHTs now steady and balanced at 370-380 in climb, oil no higher than 180.
I saw no noticeable reduction in speeds, so drag penalty seems low. Why not keep these on permenantly? They don't look too bad (pretty good actually).
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  #7  
Old 07-05-2017, 01:24 PM
Love2fly Love2fly is offline
 
Join Date: Jul 2016
Location: Virginia Beach
Posts: 6
Default Where did you buy those vents for the lower cowling?

I have the same problem and want to buy a set and get them installed this week. Any guidance is appreciated!
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