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                           TeamGrumman-List Digest Archive
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                     Total Messages Posted Tue 03/22/05: 3
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Today's Message Index:
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     1. 11:35 AM - Cylinder head temp phenomena  (TeamGrumman@AOL.COM)
     2. 12:10 PM - Re: Cylinder head temp phenomena  (HalB)
     3. 11:20 PM - Re: Cylinder head temp phenomena  (TeamGrumman@AOL.COM)
 
 
 
________________________________  Message 1  _____________________________________


Time: 11:35:56 AM PST US
From: TeamGrumman@AOL.COM
Subject: TeamGrumman-List: Cylinder head temp phenomena

--> TeamGrumman-List message posted by: TeamGrumman@aol.com

I downloaded the cylinder head temps from my JPI 800.   Ealier flights with 
the stock cowling show as little as "0" degrees difference between all of the 
cylinder head temps.   The biggest spread was 20 degrees.   keep in mind that 
I've spent the last 5 years trial-and-error trimming on baffles to get the best

temps.

With the new cowling, CHTs on 1 and 3 are about the same as with the stock 
cowling.   However, #2 runs hotter by as much as 10 degrees and #4 runs colder

by as much as 10 degrees.   These temps seem to be consistent.   I am using the

same spacing on the baffle straps that wrap around the bottom of the cylinder 
with the new baffles as I used on the stock baffles.   So, I can only 
conclude that the shape of the inlet on the left side and the small changes to
the 
front #2 baffle have contributed to the CHT differences that I'm seeing.   

I really appreciate how sensitive the baffles are to good cooling.

This puzzle still needs to be solved.

Gary






________________________________  Message 2  _____________________________________


Time: 12:10:06 PM PST US
From: "HalB" <halb@adelphia.net>
Subject: Re: TeamGrumman-List: Cylinder head temp phenomena

--> TeamGrumman-List message posted by: "HalB" <halb@adelphia.net>

Gary, I've had similar indications, I did find that by using an exhaust 
fairing that brought down the # 2 cylinder cht about 15-20 deg. but left # 4 
unchanged. I can not explain why but it did on my Tiger. # 4 is still my 
high one running about 20 deg.hotter than 1,3,4. I also have been trying 
various things with the baffles and exit ramps.
By the way we just installed a set of your exit ramps on a Cheetah and am 
looking forward to see how they work.

Hal B from Alabama N920GT
334-347-7360
----- Original Message ----- 
From: <TeamGrumman@AOL.COM>
Subject: TeamGrumman-List: Cylinder head temp phenomena


> --> TeamGrumman-List message posted by: TeamGrumman@aol.com
>
> I downloaded the cylinder head temps from my JPI 800.   Ealier flights 
> with
> the stock cowling show as little as "0" degrees difference between all of 
> the
> cylinder head temps.   The biggest spread was 20 degrees.   keep in mind 
> that
> I've spent the last 5 years trial-and-error trimming on baffles to get the 
> best
> temps.
>
> With the new cowling, CHTs on 1 and 3 are about the same as with the stock
> cowling.   However, #2 runs hotter by as much as 10 degrees and #4 runs 
> colder
> by as much as 10 degrees.   These temps seem to be consistent.   I am 
> using the
> same spacing on the baffle straps that wrap around the bottom of the 
> cylinder
> with the new baffles as I used on the stock baffles.   So, I can only
> conclude that the shape of the inlet on the left side and the small 
> changes to the
> front #2 baffle have contributed to the CHT differences that I'm seeing.
>
> I really appreciate how sensitive the baffles are to good cooling.
>
> This puzzle still needs to be solved.
>
> Gary
>
>
> -- 
> No virus found in this incoming message.
>
> 


-- 






________________________________  Message 3  _____________________________________


Time: 11:20:36 PM PST US
From: TeamGrumman@AOL.COM
Subject: Re: TeamGrumman-List: Cylinder head temp phenomena

--> TeamGrumman-List message posted by: TeamGrumman@aol.com


In a message dated 3/22/05 1:35:26 PM, halb@adelphia.net writes:


> ut left # 4
> unchanged. I can not explain why but it did on my Tiger. # 4 is still my
> high one running about 20 deg.hotter than 1,3,4
> 

try trimming back the metal baffle strap that wraps around the bottom of the 
hottest cylinder about 1 inch.

Gary