Age of Overhaul

[aviatoreb]

What model airplane and which engine do you have that you are running at 45%?

My engine starts being too cool of all things if I start running it for long at below 55%.  As it when its a fair bit below 300 I start worrying about enough heat to scavenge the lead in the fuel.  Not to mention what's happening with the oil.  Especially in the winter.  I do spend a good fraction of my time operating at 65%.  In my TSIO520NB.

[ragedracer1977]

3 hours ago, Fly Boomer said:

Do you have TSIO-520s in your airplane?  What numbers do you run to get down to 45% power?  LOP?

Yes, RAM series 1 (300hp).  2300 rpm, 12.5gph.  And whatever MAP it takes to keep it there, usually 25-26”.  Depending on altitude I can get lower FF.  Coming back from RKP I was at 14500 and closer to 11.3 gph.

i pretty much do like boomer said above. I pull it back until I’m happy with fuel remaining at destination number on my fuel flow computer.

[Will.iam]

On 8/1/2023 at 8:08 PM, PT20J said:

There is no simple answer because there are too many variables. The major concern is corrosion. Was the airplane stored in Tucson or Palm Beach? Are the cylinders steel or chrome? Who did the overhaul?  Does it have plain, DLC or roller lifters? When was the oil last changed?

A thorough review of the logs and overhaul work order and complete inspection of the engine including borescope examination should provide enough information to a knowledgeable person to make a reasonable determination.

Still, ALL used engines (and used airplanes, for that matter) are somewhat of a crapshoot.

Good luck, and enjoy the adventure.

Skip

 

New engines and airplanes are a crap shoot too only difference is a warranty that comes with a new engine or plane.