2550 Hour Report

[petehowell]

9er-Pop-Hotel turned 2550 on the hobbs flying back from South Bend to see Mom the other day! So I drained the oil after landing and went back the next day and cleaned the K&P filter and Suction screen, scoped the valves, and checked to see if she still has any compression the cylinders.

The filter had the usual carbon flakes that crush between the fingers and the screen had bigger chunks of the same. The filter magnet had a bit of ferrous dust. Cold compressions were 72,74,78,76. Plugs were dry and tannish in color. I added 1 Qt over the 50 hours, .5 at 35 hours and rest at 42 hours - she always burns a bit towards the end of the oil life.

My setup is a carbed O-320, dual EI, I run almost all 91 mogas and am LOP 90% of the time. On the trip to South Bend she ran great - at 9500 on the way down I was 149KTAS at 5.9-6.1 GPH. I run 20W-50 XC but no idea if it makes a difference.

Here are the new valve pics:

Int #1


Exh #1


Int #3


Exh #3


Int #2


Exh #2


Int #4


Exh #4

[cgeyman]

Thanks for the pictures

[rv8ch]

From what I can see, you are doing it right, Pete. Impressive! I hope my future engine reports look like yours!

Are you doing oil analysis, like Blackstone?

[petehowell]

Hi Mickey,

I am not regularly doing oil analysis.

Originally Posted by rv8ch

From what I can see, you are doing it right, Pete. Impressive! I hope my future engine reports look like yours!

Are you doing oil analysis, like Blackstone?

[bruceh]

Boy, unleaded is the way to go. Wish we could get it here without ethanol.

[Fred.Stucklen]

Originally Posted by bruceh

Boy, unleaded is the way to go. Wish we could get it here without ethanol.

So why not make your fuel system ethonal complient?

I run 93 Oct E10 gas 100% of the time.....

[gasman]

Fred, could you provide a list of items that would make the fuel system ethanol compliant....

[thiggins]

I have to ask: Is this thread to discuss long term effects of running mogas, or to show how far past recommended TBO the engine can go? (Am I missing some information here?)

[N427EF]

I have to ask: Is this thread to discuss long term effects of running mogas, or to show how far past recommended TBO the engine can go?

You'll have to stay with it to find out.

Impressive looking valves after 2500hrs and good compression.
Lots if info abound on the forum on mogas E10 and nice to see a report and pics at 2500hrs.
I won't ask about what kind of scope you used we have enough confusion already

[swixtt]

i'm impressed with those images! how many hours a year? and you're in Minnesota?