The demise of my engine

[peter anson]

Hi Kai, not sure what your point is here. We can all understand that a thermocouple is only measuring an average temperature due to its thermal mass. In fact, all the metal of the engine is only at some sort of average temperature despite being blasted by much higher temperature gasses for part of each cycle, also due to thermal mass. It is only relatively recently that even measuring individual CHTs has been common. My previous aircraft indicated the temperature of just ONE cylinder head and EGTs weren't even considered. All we expect of the EGTs is some indication that the engine is not running too rich or too lean. None of us are in the position to redesign the cooling systems of our engines beyond getting enough air through them to meet the manufacturer's specifications. I was never even able to solve the simple problem of why one EGT was always a bit higher than all the others.

Peter

[GordonTurner]

Peter. Appears you have a flux gate transmissibility error. I’m sure with an accurate entropic estimate you can work out the curve.

:)

[Jgibson]

What Gordon said! (I think)

[GraemeSmith]

O'Reilly are out of stock

https://www.oreillyauto.com/flux-500.html

[Kai]

Peter,

Be far from it that I promote some sort of product here, but have a look at enclosed photo. This solid lifter 22A (#1430) has the liquid cooled heads from Aussi Rotec, and individual efi adjustable fuel quantity injectors from Canadian SDS. Coolant temps ran in the low eighties, delta egt was 22C at the most between coldest and hottest.

I believe this would take care off all your issues?

The setup ran flawlessly for 11 years. What shot it down was the Jab network’s inability (gen 4 priority) to suppy sorely needed new 107mm cylinders.

Thanks
Kai