RED-85-Z51
Addicted to ArboristSite
Red..... you can't wear the self proclaimed title "Super Tech" and not be able to recognize the sound of piston slap when you hear it. :yourock:
Lets see, you took a scored piston (alum. transferred to the cylinder) and then you sanded the piston skirt smooth (removed even more of the alum.) and now you can't figure out what that clicking noise is. :dunno:
Okay look, pull the spark plug and take a small screwdriver and stick it through the plug hole to push on top of the piston and try to rock it in the bore...... know what that sound is now???
The piston skirt is not just there to look pretty, among other functions it's also a bearing and you just removed half of it which lets it rock back and forth as it's going up and down giving you that tinny rattling clicking sound you've grown so fond of. You also removed the base gasket on a saw that already has a pretty tight squish from the factory.... what’s your squish set at now??? Do you even know???? Did you measure it????..... I bet it's somewhere around .010 - .012" with all that piston slop can you say "head slapper". It's a wonder that thing is still together.
But you already knew that…..
I already stated that the tinny noise was piston slap. reading is fundamental.
As for squish, Trial by fire. I bolted it all up, pulled it through and nothing was hitting, so I figured it would at least start.
The original gasket was pretty thin, around 0.015, and the compound had to be good for 0.005", so I only took off about 0.010". Didnt really bump compression all that much.
i was debating hooking the tach up to it, taking it outside and having a coworker put his camera phone on the tach, tune it way lean and see how high it would spin before it either stopped revving or made shrapnel...but we chickened out when the idea of the chain coming apart at that speed was put into the process. Plus the fact the saw is in too good of shape to destroy. I really do want to have a runner, I just want to do it all myself, and in due time.
