hey guys new to the forum here, but not new to saws. just a quick question, on a 088 saw with a tuned pipe should i run stock timing or advance it or retard it a couple of degrees? any input would be much appreated.
What does retard the timing mean?
Here is the piece of the artical that I mentioned.
"Advance affects the expansion chamber primarily by altering
exhaust gas temps. More advance generally reduces EGT, to a
point. Retarding the timing makes the mixture burn later, and
more heat escapes into the exhaust pipe. Higher EGTs raise Vs,
and remembering the equation for Lt, the peaking RPM of the
motor varies directly with Vs.
Simple version: retarding the timing at high RPMs will give you
more overrev. This is no big secret, and my motor will pull
hard for an extra 500 rpm or more simply by retarding the timing
4 degrees. The trick is to keep a good amount of advance
through the upper-mid rpms, and retard timing after peak power
to extend the rpm range of the pipe. Being able to rev another
500 rpms may save a racer several shifts per lap, so retard is
an easy way to tune the exhaust system on the fly."
Spencerpaving is my buddy........ he has finally stopped lurking and posted WOW. here is a pic of his saw
hers some info on the saw, i dont mind posting it because i built it and am new to this have nothing to lose, this is just for fun. just need some help on it. saw is a 088,ported two pice head that i made about 195 lbs comp running gas. just did some testing tonight it is a 20 inch bar with a 11 tooth gear, pulling about 10400-10600 in the cut. i think it running good but compared to some saws i have seen there seems there is more to be had. dont know am i close?
Mine runs a cut down 25" bar with a 12 tooth sprocket and I'm running I think a 68 dl chain.
To get the sprocket to match up with the bar a 20" isn't wide enough on mine.
Down there at the show it will everything from gas woods ports on pipe, to full stroker alky saws, and bikesaws.
I've owned a couple of those type saws. :wheee:
1st was was a Dave Neiger built 084 gas saw to learn on. I think this was Brent Combs first hotsaw to learn on too.
2nd was a alky/nitro Marcel Vincent built 166.
3rd is when I got in over my head. Cliff Helsel built 3120 alky/nitro screaming monster. It was so damn fast my we brain couldnt keep up with it.