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1. 07:35 PM - CHT's and fuel flows (Wiley)
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| Subject: | CHT's and fuel flows |
New Rocket owner here and looking for some guidance.
The plane
io-540-c4b5 Bendix rsa
500 hrs.
Previous owner built it and battle high cht's since new. He just redid top end
at 500 hrs smoh due to low compression. The baffling looks perfect and it's obvious
he's tried everything to get the temps down, cowl flaps, louvers, silicone,
etc.
I'm getting 420+ cht's on an easy climb out and it's hard to get them down until
at altitude for a while. Even then I'm 380+.
On takeoff I'm showing flow at around 23gph. At 24sq. showing between 17 adn 22gph.
All the above up to 3000msl and oat around 75F.
A lycoming guru said my takeoff flow was 6gph low so I had the rsa rebuilt and
it came back with a report of two bad nozzles and erratic flows. After putting
it back on I'm getting almost identical flow readings. I don't have a service
manual for this engine.
I have the EIS monitoring system and I can't figure out which cht reading on the
screen corresponds to which cylinder. So can't tell you which is hottest but
most are up there.
Also, my manifold pressure seems to be an inch low w/o ram air.
Each tank has a screen but I've tried both tanks and flows are same.
Anyone have any ideas of what to check next?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=186440#186440
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