| Re: [GMCnet] 4.8 MPG. [message #324191 is a reply to message #324103] |
Fri, 22 September 2017 10:31   |
richshoop
Messages: 190
Registered: April 2017
Karma:
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Senior Member |
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Go to the Chief Aircraft Supply website. Find something related to EGT (Exhaust Gas Temperature), pick a manufacturer's website and follow the links. It has been too long since my airplane days to remember which manufacturer that I had installed on our Cessna 172. I'll look around a little and see if I can do some leg work for you. Sorry about the circular route. I wanted to respond as quickly as possible to prevent one of my GMC 6 wheeler friends from frying a perfectly good engine by over leaning, very easy to do.
----- Original Message -----
From: "Keith V"
To: "gmclist"
Sent: Thursday, September 21, 2017 6:55:35 AM
Subject: Re: [GMCnet] 4.8 MPG.
I've looked around for exhaust gas temperature info and didn't really find anything helpful.
any suggestions?
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From: Gmclist on behalf of richshoop@comcast.net
Sent: Wednesday, September 20, 2017 11:51:41 PM
To: gmclist
Subject: Re: [GMCnet] 4.8 MPG.
Watching the exhaust gas temperature is fairly standard stuff for aircraft piston engines, lots of information available for that area of interest. Be VERY careful with the lean out, minute changes can dramatically change the engine operating characteristics, including exhaust valve damage, pre ignition due to higher operating temperatures, etc,
----- Original Message -----
From: "James Hupy"
To: "gmclist"
Sent: Wednesday, September 20, 2017 8:12:57 PM
Subject: Re: [GMCnet] 4.8 MPG.
Bob, watch the exhaust temp in just off of lean cruise. It gets into the
danger zone really fast. Talk to Randy and George before you do too much,
particularly with a heavily laden coach. It can be done, with careful
management.
Jim Hupy
Salem, Or.
78 GMC ROYALE 403
On Sep 20, 2017 7:02 PM, "Bob Dunahugh" wrote:
That's the MPG range I got too with the carb. Got about 7.5 mpg with a
17000 lbs GVW over 538 miles to Elkhart. Time will tell with more miles.
Extremely pleased with the Howell EFI. Next to add the EBL so I can read
instant MPGs, and go to the 16.5 fuel mixture in the lean burn mode. Bob
Dunahugh
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