Summertime Carb Temps vs OAT

[Prior owner]

Curious what others are showing for carb temp with 80F+ OAT? Any C or G owners out there? I’m trying to figure out whether my carb heat is leaking into the carb when it’s closed...
 

I’m showing 83F Carb Temp at 80F OAT, 3500 MSL, 2600 RPM, and 24” MP.

Edited May 28, 2021 by PilotCoyote

[hammdo]

I flew yesterday here in DFW, 90° ambient out...

was about 84° At altitude

have Insight G2, sensor is in the right front cowl opening

3000ft, 20 MP, 2300 RPM, carb heat was between 75-80°

-Don

[carusoam]

Remove the side cowl...  take a look...

find the butterfly valve is it open or closed?

If you have one of the few butterfly valves with a tail pipe... it may get a bit challenging...

Move the control and see if the valve moves 90°...

Carb heat is on when the butterfly blocks the exit flow...

PP thoughts only, not a mechanic...

Best regards,

-a-

[Prior owner]

57 minutes ago, hammdo said:

I flew yesterday here in DFW, 90° ambient out...

was about 84° At altitude

have Insight G2, sensor is in the right front cowl opening

3000ft, 20 MP, 2300 RPM, carb heat was between 75-80°

-Don

Thanks Don, that is helpful!

[A64Pilot]

A temp of three degrees above ambient I woudnt worry about. To start with your assuming both temp indicators are dead nuts accurate, and that’s not always the case.

‘Obviously another variable is when comparing to other aircraft is the carb wide open? the more it’s closed, the more of a cooling effect you will have, plus again is their temp indicators dead nuts accurate?

On edit, look at your temps when its been in the hanger overnight, that should give a good idea if they both indicate the same or not.

Edited May 28, 2021 by A64Pilot