ORIGINAL: pe reivers
Big Supertigres run methanol fuel with 10% oil, and so do many competition pilots. Since gasoline lubricates better than methanol, I would use 10% with gas and plain bushings. The reason for more oil is, that a gas engine uses less fuel as compared to a methanol burner, and a little extra oil will not hurt, if the carb is tuned right.
Thanks for advice pe. I am just experimenting with this and any advice can help. The little ST was turning a 10x6 14,900 and now on gas it is turning 14,000. I have not tried to optimize the timing, it is set at 28 deg. which should be close but a slight change could get me just a wee bit more power. I know I am going to lose some power over methanol/nitro, maybe 15% or so. It runs really well and idles great. The CH has syncro spark which should help the idle some. I am going to switch the ignition over to a G51, break it in and see how it fly's. More to come.