>:-) Nitro will never beat us. I just invented that smilie.

After looking at those 4 strokes IDK if you could ever gear one high enough to get any speed. With Max RPMs being about 12,000 I think the only way would be some kind of direct drive

if you count truggies.. i went 58.3mph yesterday with a Cen Matrix tr....

1515 1y
5s zippy lipo
20/66
i could probably get 65 from it.. timing was at 0* and gearing was limited to my motor mount.

It took 2 nitro motors to get a truggy to 71mph. So I say your doing great