Valve issues

[billmaxmcw]

How many hours have you been running this way and what are your results? How many GPH did you give up moving to 1100s?[/quote]
Only about 15 hours. No big or noticeable change in GPH (I don't have a fuel meter), but CHTs are down significantly.
BIll

[Sonex541]

Those are the exact push rod tubes I put in. Hope they don't leak. 4 hours so far and no leaks. Fingers crossed
Adam Simmons
541sx

[rkurian]

Mike,

Those are good for emergency, and I would recommend carrying one or two in your tool kit, but push rod tubes also help cool the oil as it returns to the sump from the heads. Those EMPI tubes do not transfer the heat near as well as the stock ones.

Ray Kurian
N115DM

[Onex107]

I have flown and am still flying a C-150 for 20 years. For the last 15 I have burned 100% gasoline, ethanol free, in the O-200 Continental. I haven't had a stuck valve or fouled spark plug since I started using it. Before that i had to clear a fouled plug every time I taxied out. The EAA tested auto fuel in a Cessna 150 for years and has an STC you can purchase to make it leagal in your certified aircraft. The O-200 was built for 80 octane aircraft fuel which is no longer manufactured. It's a low compression engine. 100LL has four times as much lead as 80 did for high compression engines to combat pre-ignition.

I built my Aerovee to be low compression to burn 90 octane auto gas and have not had any problems for 70 hours. Also the price is right. Auto gas leaves more soot, but if you are leaned properly it burns away in the cylinders and you only see it in the exhaust pipes. The only drawback is I have to carry the fuel to the hangar, it is not sold on most airports. When I go crosscountry i burn 100ll until I get back to my hangar.
OneX 107