i need help w/duster engine
what am i missing? what event in a motor can put the piston closer than top dead center? if the valve is opened till it hits there and measured from seat and clearance is added how can it ever hit? Maybe you could run more lift due to event timing, but tdc clearance cannot be less right?
because the intake valve starts to open as the piston leaves tdc..
if the cam profile opens the valve faster than the piston is pulling away
it will strike the cam..on intake stroke.
on compression stroke the intake valve may stay open after bdc..
its prolly more critical on the exhaust stroke as it keeps the valve open to the very last minute as the piston comes up.. the exhaust valve closes..
i dont want broken parts..thats why i am asking the question...
I was hoping someone had used these pistons before and already did this...?
as far as heads..i have W-5's but my brother say's they are his... i also have commando heads..but no one knows anything about these..
My grandfather ported these..but he isnt doing it anymore..his neck and back and hands cant take it..
he said I could do it....but my hands get froze...besides..i just dont like doing it..
my heads flow 266 cfm up to .500" and some more after that..My dad ( i just spoke to him on the phone) said he will find the sheet..
or my grandfather might have them..
Mel
