jmester
ArboristSite Operative
What is the best way to figure out port timing? With a degree wheel or dial indicator.
Also what is the best way to measure piston to head clearance.
Also what is the best way to measure piston to head clearance.
What is the best way to figure out port timing? With a degree wheel or dial indicator.
Also what is the best way to measure piston to head clearance.
Maybe if you have a cheap dial indicator or don't zero it properly... Even a few degrees before or after TDC the piston IS still moving up or down relative turn the crankshaft's arc of rotation,and a quality indicator properly used will indicate that exactly,my indicator has a small roller bearing so friction cannot squew the reading. Common Stumpy this method is used by race engine builders all over the world,are they all wrong or mis-informed?
For every degree of rotation near TDC my indicator will show piston movement up or down exactly.
I know some people will use the "stopper" method,but it is not more exact,just handier in some instances.
The idea that the piston is not moving up or down near the top or bottom of the stroke is not correct,just the movement IS trickier to detect.
Thanks Stumpy,but I think I must agree with your words of caution.:msp_thumbup: If not properly used or in some circumstances(Like the spark plug hole is at quite an angle-not straight down over the piston)then the dial indicator may not give an accurate reading.
I'm wondering if you are thinking of the piston stopper method as an alternate to find TDC,which may be better in some cases,and doesn't require having a dial indicator.
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