ScottA
Joined: 05 Jan 2006
Posts: 100
Location: Park City, UT
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 Posted: Mon Jul 24, 2006 9:33 am Post subject: CHT |
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Just a follow up on my high #3 CHT. �It was 25C or so higher than #6 and #9.� Now it is within 4C of the other two and it is not the hottest (#6 is 4C higher than #3 and #9).
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I added some louvers to increase the exit airflow and installed a spinner that I had to decrease the intake air.� After talking with a few others I think the inlet to outlet ratio is pretty far off on the way I was set up (Murphy Moose).
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But I really think it was the #3 exhaust leaking onto the probe, there was some grayish discoloration on the bottom of the exhaust stack just aft of the nut/collar.� The nut or collar was tight, I had tightened them after the first hour or so but I think it still was not seated fully.� Loosened that exhaust segment on both sides and tightened the collar nut on the cylinder first then re tightened the clamps on the segment.
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I think the air ratio work helped overall though as this was a takeoff from a density altitude of 6,700 feet and the hottest I ever got was 212. Before even the cooler ones (on a cooler day) were 225 to 230 in the climb.
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FWIW
Scott
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