I was talking about the 15cc EVOSo your talking in terms of the new 3.5 Evo?Chuck ,It is either we pull more prop....???? Or we think we pull more prop.....???? :huh:The new engine seems to have more power and allows us to pull bigger props . Main difference is the crankcase , the crankshaft and the liner compared to the RS engine .
You race 6.5 and now with no change you have to run 6.7.....????
i cannot speak in terms of pitch but i can tell you this , we run 54mm props and with the evo type engine we can run 55mm ( and maybe more ) props . Its not thinking , it is so , Believe me
Or overdriving a 15cc Evo?
The piston casting look good. plenty of meat on the boss and the crown is .115 thick. the taper is the same as the old piston with the pinch just above the wrist pin.Im more interested to know about the piston durability
David is there any noticeable change to the piston crown, pin height, crown thickness, pin boss thickness or materials change.
Too many guys are / were holing pistons. Even if at the time they went lean there needs to be more margin for error for most guys. 1 lean motor on a twin and you habe a holed piston.
There is no reason in heat racing to run that high of nitro. It is just popular.
Not entirely correct. Lets call if for what is. "It's just easier with liquid torque."High nitro is needed to run at higher RPMs.
Not entirely correct. Lets call if for what is. "It's just easier with liquid torque."High nitro is needed to run at higher RPMs.
Did I say it was easy to burn it, no. It's easier to find a setup with higher nitro than less was what I was getting at. Liquid torque gives margin for less than perfect everything. For example - the head button isn't right for the fuel either in volume, squish velocity etc etc. Altering the nitro content by upping it might bring it to a more acceptable set-up.So you think it is easy to burn 60% in a RS 1.01? :huh:
You ever burn a hole in one or pull the pin out of the piston at almost 28000 RPM?
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