Mixture Rich or Best for ground ops

[MikeOH]

23 minutes ago, Ragsf15e said:

this is a perfect thread on it. Get down about 8 posts to @kortopates description with Saavy data.

@Ragsf15e

BINGO!  Thanks for that link!

I have a PowerFlow exhaust.  While it looks like 16 gph might be okay if I didn't have the PowerFlow, I'm betting it's too low with one.  It's just what Paul says, after I climb up a few thousand feet EGTs drop under 1300 and I can easily lean to keep them there.

[PT20J]

From https://www.advancedpilot.com

targetegt.pps

 

 

[carusoam]

Target EGT is the accepted method for setting mixture when not at sea level…

When it comes to having real EGT numbers that work…. Mooney used precision locations for mounting the ship’s EGT gauge in the six cylinder models built after 1994….

Precision EGT is nice to have… but not a requirement for using Target EGT Method….

 

The exhaust gasses expand rapidly in the open exhaust pipe… this random expansion causes its temp to drop radically….

So… the location of the sensor within MMs is actually important for the precision aspect…

 

This methodology doesn’t get remembered very well after primary flight training… it’s probably in the text… it just didn’t get used until you become an owner of a Mooney…. 

 

PP thoughts only… not a mechanic…

Best regards,

-a-

 

[Mooney-Shiner]

Just to update. 

I think I solved my marginal run-up due to fouling, thanks to this board. 

 Right after start I let the engine warm up for 20-30 sec. Then with throttle setting at 1000RPM, I lean my mixture until my fuel flow reads 1.5 GPH (I'm at sea level at KTPF).  Every time I do this, I get solid run-up (@1700RPM) without left mag dropping my RPMs significantly like it used to. 

Thank you for all of the help, guys.