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  #1  
Old 09-08-2014, 06:11 PM
Chuck McCurry Chuck McCurry is offline
 
Join Date: Feb 2011
Location: Silt Colorado
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Default O320 with 10.5 cylinders?
Has anyone had LY Con flow there heads and up the Compression to 10.5 on there O 320? Also what was your impression I fly out of 6000 ft. msl.
Last edited by Chuck McCurry : 09-08-2014 at 06:17 PM.
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  #2  
Old 09-11-2014, 01:13 PM
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smokyray smokyray is offline
 
Join Date: Jan 2005
Location: TX32
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Default Ten to One...
Quote:
Originally Posted by Chuck McCurry View Post
Has anyone had LY Con flow there heads and up the Compression to 10.5 on there O 320? Also what was your impression I fly out of 6000 ft. msl.
Chuck,
I didn't install LyCon pistons but I installed aftermarket Airboat TRW forged racing pistons (10.25:1) and rods in my RV4's wide deck 0-320E2D with stock cylinders. It has amassed 500 hours with no worries, the new owner having no problem keeping up with much higher HP airplanes.

Performance is stellar, estimating 175HP, burns less fuel and runs cooler...

V/R
Smokey
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  #3  
Old 09-11-2014, 01:26 PM
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rocketbob rocketbob is offline
 
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Quote:
Originally Posted by smokyray View Post
Chuck,
I installed aftermarket Airboat TRW forged racing pistons (10.25:1) and rods in my RV4's wide deck 0-320E2D with stock cylinders. It has amassed 500 hours with no worries, the new owner having no problem keeping up with much higher HP airplanes.
Where do you get these pistons from Smokey?
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Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
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  #4  
Old 09-11-2014, 05:49 PM
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hlangebro hlangebro is offline
 
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Yeah, I'd like to know where you got them too
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  #5  
Old 09-11-2014, 07:01 PM
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Neal@F14 Neal@F14 is offline
 
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Location: Wichita Falls, TX
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I've found this one place for high compression pistons for lyclone engines.

http://combustech.com/Products/Lycoming%20Pistons.html

Does anybody know anything about Combustion Technologies?

I have been interested in a possible high-compression upgrade to my O-320 and stumbled upon this website in my searching and it piqued my interest.
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  #6  
Old 09-11-2014, 07:06 PM
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rocketbob rocketbob is offline
 
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Yes combustion tech has been around awhile, but I'm wondering if TRW actually makes a piston for a Lyc.
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Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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  #7  
Old 09-11-2014, 07:41 PM
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Neal@F14 Neal@F14 is offline
 
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Quote:
Originally Posted by rocketbob View Post
Yes combustion tech has been around awhile,
Are their pistons pretty good? Their prices seem reasonable.
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  #8  
Old 09-11-2014, 07:50 PM
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grubbat grubbat is offline
 
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Location: Ga
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Default 9:1 - 357
I used their 357 forged pistons in a 0320 for 9:1 compression. Very nice mfg, ran great for the 100+ hours and still doing good. Had to get heavy wall pins from another place though.
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  #9  
Old 09-15-2014, 12:40 AM
deek deek is offline
 
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Location: Flathead Lake Montana - 8S1
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You might want to talk to Klaus about high compression pistons for your 320
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