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  #21  
Old 05-23-2016, 01:09 PM
cactusman cactusman is offline
 
Join Date: Oct 2012
Posts: 421
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Quote:
Originally Posted by Sink View Post
Do not allow any header wrap on the EGT probe.Do not over wrap or under wrap the probe. The header cloth should be at least 1/8" + away from the probe. Neither Dynon nor Rotyax know the exact cause of the interrupted EGT signal. It works on millivolts so it doesn't take much. It has demonstrated that the cloth and the probe are not compatible and can cause EGT temps to flux as much as 125F and usually to the high side. The oil tank will not effect the EGT probe. The probe is inside the exhaust pipe at temps around 1300F-1500F. The oil temp of 215F won't have any effect and the probe would have to be in the oil itself.

An EGT spread of 80F can be very normal for some engines. It depends on several factors. Carb sync, probe placement, internal carb wear, air filter, ect...
An EGT temp with only a 15F spread is considered the same. EGT temps differ with throttle settings and will move up and down and closer or farther apart depending on the throttle settings.


Bottom line don't worry about an 80F spread unless you know you did something that effected the burn and can correct it.
I didn't wrap the probe itself or the exhaust pipes....just a portion of the spring and wire coming out of the probe in close proximity to the tank and it was only a few inches. Wrapping pipes is generally not a good idea so I have heard.

My carbs are super synced, my air filters super cleaned, my floats are new (er).

As for the tank not causing the higher EGTR...do all 912 installations on other LSAs run ~80 degrees hotter on that R side?
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  #22  
Old 05-23-2016, 01:47 PM
Dpick23 Dpick23 is offline
 
Join Date: Aug 2015
Location: Lindenhurst, IL
Posts: 10
Default EGT difference

After I sync'ed my carbs, my right EGT now runs about 50 degrees warmer at cruise. Engine has never run smoother and it has remained very consistent over the last 30 hours. After all the other comments on this thread (and talking with the guru's at Lockwood) I am not worried about this difference.

On another note- I also had a bad EGT probe(left side) around 150 hrs- put in a new Dynon probe and no further problems (i.e. high EGTs).
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