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BobbyPaulk(at)COMCAST.NET
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Posted: Thu Jul 23, 2009 5:07 am Post subject: cooling

All,

i have the 3300 in a 601 XL. it has the original low Ram Air Ducts with the plug wires going thru the duct at the plugs. i have glassed in the dams between the plugs and can move the temps around but can not get all of them in a safe operating range. on the left side  i got #2 down to 270 degrees but #4 went up to 340 plus. i put a longer dam at #4 and it came down to 285 BUT #6 went to 353 even at low power settings. i have installed the dams - ground off an 1/8" at a time - removed them and put them back at different angles. nothing i do seems to work. i can't help but think there is not enough air in the shallow duct to cool all three cylinders on one side. the right side 3 cylinders seem to be O.K.



has anyone had this problem and have you solved it ?? i know the prop is coming up on the left side and down on the right side so it changes the angle of entering air, but how do i get them all cool. 



thanks for any help.

i have 85 hrs on it and still fighting CHT's 



DO NOT ARCHIVE



Bobby

N131BP

 [quote][b]

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Jim McCormick

Joined: 19 Mar 2007
Posts: 18
Location: Fresno, CA

Posted: Thu Jul 23, 2009 1:41 pm Post subject: cooling

Hi Bobby

 

 If you can please give a call, I have  some questions about your installation so I can direct in the right direction on reducing your CHT’s.

 

 

 Jim McCormick

 Jabiru Pacific LLC

 255 W Fallbrook Suite 202B

 Fresno, Ca 93711

 P 559.431.1701

 F 559.233.3676

 www.jabirupacific.com 

 

 

 

 

 On 7/23/09 5:59 AM, "[url=BobbyPaulk(at)COMCAST.NET]BobbyPaulk(at)COMCAST.NET[/url]" <[url=BobbyPaulk(at)COMCAST.NET]BobbyPaulk(at)COMCAST.NET[/url]> wrote:

 

 [quote]All,

 i have the 3300 in a 601 XL. it has the original low Ram Air Ducts with the plug wires going thru the duct at the plugs. i have glassed in the dams between the plugs and can move the temps around but can not get all of them in a safe operating range. on the left side  i got #2 down to 270 degrees but #4 went up to 340 plus. i put a longer dam at #4 and it came down to 285 BUT #6 went to 353 even at low power settings. i have installed the dams - ground off an 1/8" at a time - removed them and put them back at different angles. nothing i do seems to work. i can't help but think there is not enough air in the shallow duct to cool all three cylinders on one side. the right side 3 cylinders seem to be O.K.

 

 has anyone had this problem and have you solved it ?? i know the prop is coming up on the left side and down on the right side so it changes the angle of entering air, but how do i get them all cool. 

 

 thanks for any help.

 i have 85 hrs on it and still fighting CHT's 

 

 DO NOT ARCHIVE

 

 Bobby

 N131BP

 

 

 

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