Saw builds

[jmssaws]

Race sugar or booger sugar?

Either way run 32:1

 

[sawmikaze]

Either way run 32:1

Heavier ratios of booger sugar make people get weird..

Bye boys.

 

[Deets066]

Heavier ratios of booger sugar make people get weird..

Bye boys.

Make ya do this

 

[jmssaws]

Make ya do this

Well said

 

[Deets066]

Saw builds.....................

Workin on revamping the hybrid.

I planned on running a 272 single ring piston. The pin is the same, but the skirts are the same width. 272 has shorter skirts and a .102 taller crown. Just didn't work out.

 

[Deets066]

I just used a 46 piston timing was pretty good. No gasket, 102-119.5-73

 

[jmssaws]

I was going to takes some pics and a video of how I build 660's for the logging outfit in town today but I forgot.
I build a bunch of saws for them.
Mild compression and a small ignition advance with a mild muffler mod. They still run good and live on and on.
The saw today went back to work at
99 120 80

 

[Deets066]

I'm gunna try longer BD on a hybrid, Snelling started the short BD theory for these that everyone lives by.

 

[huskihl]

I'm gunna try longer BD on a hybrid, Snelling started the short BD theory for these that everyone lives by.

Works OK on a dolmar

 

[Deets066]

Works OK on a dolmar

I'm goin for velocity on this one

 

[srcarr52]

I'm gunna try longer BD on a hybrid, Snelling started the short BD theory for these that everyone lives by.

Short blowdown only works if everything else is well balanced. It will produce good peak power but the rest of the curve suffers. Could be fast on the block or really slow depending on the operator.

 

[jmssaws]

Short blowdown only works if everything else is well balanced. It will produce good peak power but the rest of the curve suffers. Could be fast on the block or really slow depending on the operator.

I've learned to use more bd than I use to and I prefer the feel of a saw with more.

 

[huskihl]

I went 100 124 on Dave's 441. More power and faster spool up than at 101 126. Intake opened at 80.

 

[Deets066]

Short blowdown only works if everything else is well balanced. It will produce good peak power but the rest of the curve suffers. Could be fast on the block or really slow depending on the operator.

I left the transfers untouched, final numbers 101.5-122-80 with .022 of the base and no gasket

 

[drf256]

Short blowdown only works if everything else is well balanced. It will produce good peak power but the rest of the curve suffers. Could be fast on the block or really slow depending on the operator.

I remember Treemonkey fully disagreeing with Brad's belief on it.

 

[exSW]

I remember Treemonkey fully disagreeing with Brad's belief on it.

Good enough for me.

 

[drf256]

IIRC, there was some member from the Netherlands who really knew his stuff talking about redoing one. Brad offered his theory and findings, which in and of itself was totally fine. But then the guy disagreed, Brad failed to have an open mind about it, and the ole AS *s-wordpile thread began.

The guy and Scott were posting some pretty technical stuff about 2-strokes and BMEP's. Seems the poster was some type of mechanical engineer or something.

I'll try to find the thread.

 

[drf256]

Here it is. A good read.

http://www.arboristsite.com/community/threads/sthil-044-transfer-height.209978/

 

[mdavlee]

The lower blowdown ones are fast in small stuff. I think my 046 cylinder only had 16 degrees as it was.

 

[jmssaws]

My first year 046 had 17 degrees of blow down and my 460 had just over 20,no earth shattering difference between them.