Originally posted by boner
There is a speical blend of fuel for 4 stroke engine but that's for planes. If anyone here have ran 4stroke version of kyosho superten fw04 or any contact with OS can share some light on this.
I've got a 4 stroke Kyosho FW04. Haven't tried 4 stroke fuel yet but I've heard it improves power. Not sure how valid this info is but I just run what the other 4 stroke guys are running at my track. 20% with high castor oil content.
mxwrench is pretty much right too about the 4 strokes info.
I'm very interested in the development of this "modified" 4 stroke. I'd like to see stronger pushrods paired up with stiffer valve springs. That would certainly give it a little more RPM. And with a new profile cam with bigger valves that you're making, I'm sure it will be a beast in the top end. But definitely keep us updated. I love running my thumper but just wished it had more power!