Author Topic: 039 power tips for build off  (Read 1783 times)

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Offline Cut4fun .

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Re: 039 power tips for build off
« Reply #20 on: January 04, 2012, 07:19:05 pm »
Brad uses him to cut his bars down. I can email him too.
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Offline Cut4fun .

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Re: 039 power tips for build off
« Reply #21 on: January 04, 2012, 08:30:54 pm »
Mike, Brad said it is That is Wigglesworth  Jeremy.  I need to get in contact with him. Help somehow?

 I know he lives down close to Murray KY where I was born on the other side of KY Lake.   I go fishing there every year still.
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Offline rms61moparman

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Re: 039 power tips for build off
« Reply #22 on: January 05, 2012, 05:21:27 am »
Oh yes!
Shoot me a PM with your phone number and I'll have himgive you a holler or you can shoot him a PM yourself at ........the other site.
his username there is wigglesworth.


Mike

Offline StumpysCustoms

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Re: 039 power tips for build off
« Reply #23 on: January 06, 2012, 11:50:33 pm »
Hey Mike,  I'll send you a link @ the other site to my MS 290 thread.  Everything I know about those saws is in there. 
I know that 290 is a stout saw.  It was cuttin right close to a 440 last time I ran it.  The vids are in that thread. 
I think you asked me about this saw a while back.  I can't remember if I ever got back to you.  If I didn't I appologize.  Please let me know if you need any help with it.  I don't have to many secrets.

Offline rms61moparman

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Re: 039 power tips for build off
« Reply #24 on: January 07, 2012, 10:36:52 am »
Well Stumpy I'll definitely need all the help I can get.
This saw runs out great but it really needs about 30 lbs. more compression.
I have got a MONSTER pop-up in it and it brought it up about 15 lbs.
What I REALLY need is a .030 taller piston.


Mike

Offline Al Smith

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Re: 039 power tips for build off
« Reply #25 on: January 08, 2012, 08:46:39 pm »
The idea was right  you just didn't go far enough with it .

There have been people who welded pop up to increase the comp on clam shell saws but they were wide pop  ups ,not like the head on a rivit .A little skinny pop up won't do you a lot of good for several reason .

First up inside the combustion chamber it does nothing for the flame front except blow it out sideways .It doesn't do a thing to redirect the transfer around the intake  side of the cylinder for a better scavanging  to purge the residue  exhaust gasses .

To raise the comp you have to fill the void that would normally be air space with metal ,you just don't have enough of it .

This is a standard  pop up on a removable cylinder Stihl saw which is somewhere around 25-30 thou .It was not done to raise the comp but to improve flow over the top of the piston .I could have made it a tad wider but it works as intended


Now I hate to bust your bubble on this and I'm not trying to be a smart azz but that design of pop  up is just not going to work the way you want it to .

Offline man of stihl

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Re: 039 power tips for build off
« Reply #26 on: January 08, 2012, 09:06:55 pm »
Thats a good idea you have with the block holding the piston in place when installing the cylinder. ;)
Ron

Offline rms61moparman

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Re: 039 power tips for build off
« Reply #27 on: January 08, 2012, 09:29:39 pm »
My bubble isn't really burst Al.

It's like Edison said when inventing the light bulb. "Now I know of a thousand things that won't work.
This is just a toy for me anyway.
Hopefully I'll get the right combination before I die!LOL


Mike

Offline Cut4fun .

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Re: 039 power tips for build off
« Reply #28 on: February 18, 2012, 07:10:29 pm »
Mike looks like mweba figured out something to get that psi up with a mac piston and shortening the rod.  :o I think he said something in the 170psi range .

McCulloch Titan 57 piston in this saw due to the thin rings and domed crown.

This 310 saw is running a McCulloch Titan 57 thin ring domed piston. In order to fit this piston having a lower pin placement, the connecting rod was shortened by 3.5mm. In this wood with a 20" full ch it pulls a consistent 10200

http://www.youtube.com/watch?v=khmvGjPRjMk

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Offline mweba

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Re: 039 power tips for build off
« Reply #29 on: February 18, 2012, 09:53:17 pm »
This saw has my mind spinning.  Ended up with four tanks through it today.  BTW the grinder has not touched a port or tranfer on this thing yet.  Kinda scared to honest LOL  I wore my grinding face shield for the first tank................


Mod ms310 by mweba1, on Flickr

 

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