komatsuvarna
Arboristsite MVP
Yep, it doesnt take much on the 395s. Mine was about 185 with no gasket and .030 squish if i remember right. A cut chamber will get close to 230! :msp_scared:
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Woods Porting The MS660......Tricks And Tips
- Thread starter Mastermind
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Yep, it doesnt take much on the 395s. Mine was about 185 with no gasket and .030 squish if i remember right. A cut chamber will get close to 230! :msp_scared:
I hope so! It's going to the same guy this MS660 is that Randy just built, lol. I can't be having the competition show me up ya know
Mastermind
Work Saw Specialist
I hope so! It's going to the same guy this MS660 is that Randy just built, lol. I can't be having the competition show me up ya know
If the 660 beats it you have done something very wrong.
The 395 sounds good without adding compression, but even better with 210 PSI. It's all your fault Randy
[video=youtube_share;29dkF0qyBGU]http://youtu.be/29dkF0qyBGU[/video]
[video=youtube_share;29dkF0qyBGU]http://youtu.be/29dkF0qyBGU[/video]
Deets066
Firewood hack
Sounds like a good runner brad!
Either of you guys ever took an oem cylinder and bored it out and used an aftermarket big bore piston? This has been running through my head lately, and I just might have to try it out.
Either of you guys ever took an oem cylinder and bored it out and used an aftermarket big bore piston? This has been running through my head lately, and I just might have to try it out.
Deets066
Firewood hack
On an 066 by the way. :msp_thumbup:
Mastermind
Work Saw Specialist
[video=youtube;eXHTVS_wuSo]http://www.youtube.com/watch?v=eXHTVS_wuSo&feature=plcp[/video]
Deets066
Firewood hack
mtrees
ArboristSite Guru
I just can't wait to play with them both!!!!!
Mastermind
Work Saw Specialist
I have zero skills as an operator with that type of saw. It's just the way it is.
Also that saw was running out of fuel in the third cut. It caused it to score the piston.
It's undergoing a revamp at this time with a welded intake block and a huge kart engine carb.
That saw sounds almost exactly like my 394, but mine doesn't have that annoying whine.
Now that is something I'm looking forward too in my 394 AND my 3120. Local Polaris dealer has a 16-gallon drum of 117 octane race gas I could mix 50:50 with my beloved AVgas.
Mastermind
Work Saw Specialist
I'm testing compression on your piston with my 394. What do you think compression should be?????
I dunno...my 394 is apart right now or I would run out and slap the compression tester on it. If the comp is insane I'll just take a big ole file to the top and file away at that hump.
Deets066
Firewood hack
what fuel\oil you guys running at 200 psi? I have an 046 with 205 psi, 100 octane with redline oil. Just curious
Premium pump gas with full synthetic oil at 32:1. That's what I advise to all my customers. I wouldn't go any less than 40:1.
Mastermind
Work Saw Specialist
I dunno...my 394 is apart right now or I would run out and slap the compression tester on it. If the comp is insane I'll just take a big ole file to the top and file away at that hump.
I've got both pistons done and boxed up Roger. I had a 394 apart and would have tested compression but the rings were 1.5mm in your piston and I only have 1.2mm rings here.
I agree completely.
parrisw
Tree Freak
I use the gas I drain out of the scrap cars at work, and the cheapest walmart oil I can get my hands on. Some times I just use SAE 30 and just dump a couple glugs into the chainsaw gas tank.
Is this what you guys recommend for any ported saw?
