Very very nice indeed
Nik's Poulan Thread
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Very very nice indeed
Really enjoying the 8500. Cut a pickup load of wood with it today.
Rocked my only 24” chain so jumped down to the 20” bar with the bar adaptor from Homelite410. Needed to do a little bit of filing to get the adaptor to work on this saw but everything is great now.
Rocked my only 24” chain so jumped down to the 20” bar with the bar adaptor from Homelite410. Needed to do a little bit of filing to get the adaptor to work on this saw but everything is great now.
Yes the 3700 has a bridge just like a 4000. It is basically the same cylinder except the 4000 is just a larger diameter for the extra CC.
I would leave the bridge in to give support to the piston ring or else it could expand to much.
I have a timing wheel and have used it but like you said I just widened the ports some and keep it gradual at the edges so that the ring will not hang up.
Svk, do you have a homelite 410 I have been interested in them they remind me of a 4000
Well yeah I thought that and then it dawned on me the rings are above the port.
Did you gain much with a widening?
I've got a husky 350 perhaps I should have a play on it 1st to get the feel.
No I do not. I meant the adaptor came from Mike aka @Homelite410
Just aspen. My neighbor had a bunch of widow makers and blow downs on his property and they are right by the road so I’m supplementing the boiler supply.
You gain a little but it is a culmination of things that make a difference. Mild porting, reducing the squish, matching the cylinder exhaust port and the muffler port, doing a good muffler mod, advanced the timing a couple of degrees, on the counter vibes smoothing out the intake. I have a 3700 I did all those things to and yes there was a difference.
I have an IWB they are only slightly less hungry!!! I’ll probably use about 12 cords and only had time to get about 10 cords laid in by fall. The good thing is I have plenty of wood to cut nearby and can haul with truck or snowmobile.
Considering a longer bar for the 8500. Should I go 28” or 32”?
Yeah makes sense on my 4000 I did the intake/adapter as it didn't look nice. The exhaust port looked nice against the muffler I drilled out the baffle and removed the screen mine is a Canadian model with no side port in the muffler so added that and deleted the base gasket. I never new if any made a difference as it got new rings at the same time so yeah but that intake sure was nasty.
I burn a bit of poplar and other wood the snobs would look down on too. It's free it burns it's easy splitting it drys fast and is warm so why not and I get to play with my saws. If the people in my circle are in need of wood then there's always some poplar dry and it mixes good with nicer wood. Does smell funny though
I take what I can get around here too for wood. As you can see not a lot of trees around.
Wow man just wow
Has anyone "been there, done that" with swapping a Stihl 039 / 390 piston (or any other 49mm piston for that matter) into a PP380 / 3750 for a bump in compression. It's pristine inside and only pulls 130lbs with .050" factory squish. I am thinking pop up. Squish is almost .040" without a base gasket. I would prefer to not mill the base, intake timing is already at 79° I'm mainly concerned with location / width of ring locating pins on the 039 piston. If not, I'll just order one and find out, but thought I'd check here first. I tried to search, but had no luck. Any input is welcome. Thanks in advance. 
I read something on it years back. I will see if I can locate it. http://chainsawrepair.createaforum.com/poulan/ update - I was wrong, my search lead to 039 piston upgrades for s39 build off.
Lot of mine stock pulled 180psi with gasket. 150psi seems to be the norm.
I dont want much more then 180 in my work saws. JMO
IMO pull apart and see why your only pulling 130psi.
Looks like a nice clean super 380, but like JJ said I would see why your compression is so low. Maybe a ring starting to stick or some scoring somewhere.
Instead of milling the base of the cylinder you can always sand it down a little on a flat surface using a side ways figure 8 motion and then rotating the cylinder.
Instead of milling the base of the cylinder you can always sand it down a little on a flat surface using a side ways figure 8 motion and then rotating the cylinder.
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