Think I found my problem. opinions

[Turbopro]

Finallygot tired of the continually worsening bog on my sled, and tore the sled down and put it back to stock after checking everything that I could think of. This is what I had checked:
1. Exhaust valves (clean and holes clear)
2. TSS (bypassed with resistor)
3. Coils resistance
4. Wiring
5. TPS (replaced 50 mile ago and still checked out)
6. Reeds ( no chipping or cracking)
7. Had fuel controller swapped out (no difference)
8. Fuel pressure steady @ 59#
9. Fuel filter seems clear
10. Compression (120# on my gauge)
11. Clutching (all good)
12. BOV (not sticking open)

When I went back to stock the bog was still present. Went and filled tank with 87 octane as I thought that would be a better blend and bog cleared right up and sled runs strong. Is it possible that my whole problem was bad AV gas the whole time. If that is it I will be totally pissed. I have been chasing this for 2 years and never thought to change the AV gas out as I thought , hey its AV gas gotta be good.

opinions

 

[die hard poo]

It could be that you were over octaning your motor, what elevation and boost were you running? I was able to get away with mixing 100LL with 3 gal of 87 octane and running 10# of boost at 2000ft with no det at all. I was trying to iron out a really boggy engagement, unfortunately it didn't help my issue...

 

[Turbopro]

about 6# at 2000' and 10# at 8000'

 

[m1kflyingtiger]

about 6# at 2000' and 10# at 8000'

Yup. I'd put money on I being too much octane.

 

[jeepin270]

I run straight avgas, 10 boost, sea level with a low compresson head. If there is a bog I tune it out and with dobek box. I have also never had any moisture problems.
Where r buying ur avgas? I get mine from same pump that the planes use. I have heard of airports taking gas out of planes that were gonna be stored and still selling it to people like us.

 

[Turbopro]

I couldn't tune it out with the box. I also bought the av gas right out of their main av gas storage tank.

 

[mt.sledder]

How long ago did you buy the gas and was it just sitting in your Sled the whole time.