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Malcolmbru(at)aol.com
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 Posted: Wed Aug 22, 2007 6:59 pm Post subject: older egt sending Y or K wire? |
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I think I may have a older set of egt sender wires with a new gage? my plugs look very dark with a lot of carbine building up in the manifold but I often hold egt's above 1200 and cruse at 5300 rpm with 1150egt my egt gage requires the newer wire. how can I tell which wire I have?
malcolm michigan
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Float Flyr
Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland
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| Posted: Thu Aug 23, 2007 6:31 am Post subject: older egt sending Y or K wire? |
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Hi Mal
I have a couple of questions.
You say the plugs are dark. Have they gone all the way to black or are they a dark brown?
Are all four plugs the same colour? Do the EGT gauges read the same at WOT, at cruise? how long does your engine idle before shut down after a flight?
Ok so that's a fist full of questions... Never said I could count.
If you have to idle your engine for a half an hour taxiing before shut down which will do a good job of carbonizing up your plugs.
Assuming that isn't the case, and the plugs are a brown colour you can try increasing the EGT to 1200. Remember these gauges are not calibrated as TIT, TOT or ITT gauges for turbine engines are. The location of your probes a couple of millimetres (threads) one way or the other and your readings go out the window. When you find the indicated temp that gives you a nice tan colour write that temp in your journey log, if you keep one, for future reference and in case you ever sell the plane.
If the plugs are black, sooty and ready to foul at the end of each flight you may need to change out the main jet and let your gauges read 1300 or even higher.
You can also check your air filter to make sure it isn't plugged with dirt or bugs. That can cause a rich condition.
As for the EGTs themselves if your plugs are all pretty much the same colour and the gauges are reading the same from cyl 1 to cyl 2 I wouldn't mess with it. Accept the fact on your particular set up the proper EGT will be above 1150.
[img]cid:831044113(at)23082007-022C[/img]
Noel Loveys, RPP, AME intern
Campbellton, Newfoundland,
Canada
Kitfox Mod III-A, 582, B box, Ivo IFA
Aerocet 1100s
noelloveys(at)yahoo.ca (noelloveys(at)yahoo.ca)
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Noel Loveys
Kitfox III-A
Aerocet 1100 Floats |
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Guy Buchanan
Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA
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| Posted: Thu Aug 23, 2007 7:12 am Post subject: older egt sending Y or K wire? |
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At 07:58 PM 8/22/2007, you wrote:
| Quote: | how can I tell which wire I have?
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Sorry Mal, couldn't find anything on "Y" wire. J is red / white
twisted pair. K is red / yellow twisted and is what I use. The only
other problem you might have is that it's tricky to extend
thermocouple wire. The easiest way is to use thermocouple wire
throughout and silver solder or use thermocouple connectors.
Otherwise you may get errors.
Guy Buchanan
San Diego, CA
K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.
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Guy Buchanan
Deceased K-IV 1200
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