390xp

[NORMZILLA44]

ptjeep and i done a little testing on my 385 today. i can say this i know where to get those missing rpm that it didnt have but i think when i did that i lost some of the torque. id rather have the torque that it had before the change. so i put it back.

Good point, I have run with a lot of guys who leaned there saws out, to get the highest rpm, but I would beat them at the stump. Kind of like floating the valves on a 4 stroke, you go backwards a little on the torque as it falls. Howdy Will Looking good man sweet saw:msp_wink:

 

[parrisw]

Picked up a new compression tester today. I duno WTF is going on but the 390 only blew 145psi??????? My nice 372 blew 160psi which I knew from before, so the gauge must be accurate. I don't really think its going to come up allot once broken in.

 

[Outlaw5.0]

My new 390xp is only 150 psi.

 

[parrisw]

My new 390xp is only 150 psi.

I figured it would be higher, since I machined out the squish band.

 

[tlandrum]

the one i just ported for nixon is setting at 185psi

 

[SawGarage]

I figured it would be higher, since I machined out the squish band.

Will, The deck heights of the piston the same? decomp blocked with a plug, or ATLEAST sealing?

I would think It would be higher too... I put a new slug in a Jonsereds 625, sans base gasket and it blew just under 190. The saw had not been run yet!... :dunno: THAT I was surprised with....

 

[mdavlee]

I would think it should be up 175+++. The one I had with no popup and the squish at .019" was 175.

 

[FATGUY]

I took .035" off Brad's and it's blowing just south of 200... check your decomp.

 

[parrisw]

Thanks guys, I'll check it again tonight with a plug instead of a decomp.

 

[blsnelling]

I took .035" off Brad's and it's blowing just south of 200... check your decomp.

It actually went up after this, just shy of 200.

This is a 28" bar, full comp RSC chain, and a 7-pin rim in hardwood.
[video=youtube_share;3vT4DeVoyd0]http://youtu.be/3vT4DeVoyd0[/video]

 

[NHlocal]

It actually went up after this, just shy of 200.

This is a 28" bar, full comp RSC chain, and a 7-pin rim in hardwood.
[video=youtube_share;3vT4DeVoyd0]http://youtu.be/3vT4DeVoyd0[/video]

Nice "little" saw...me likey.:msp_wub:

 

[tlandrum]

this one runs pretty good heres the saw in stock form
[video]http://www.youtube.com/user/tlandrum2002?feature=mhee#p/a/u/1/7xHXQtSDqfU[/video]


here it is after porting [video]http://www.youtube.com/user/tlandrum2002?feature=mhee#p/a/u/0/0wG4T_NVsQg[/video]

 

[nixon]

I'm looking forward to Getting the saw back in my hot little hands !
Got the 372 cleaned up and ready to ship ..... Just have to locate a decent box .
Heck, even the wife was impressed ! :msp_biggrin:

 

[NHlocal]

Can you say CAD...

this one runs pretty good heres the saw in stock form
[video]http://www.youtube.com/user/tlandrum2002?feature=mhee#p/a/u/1/7xHXQtSDqfU[/video]


here it is after porting [video]http://www.youtube.com/user/tlandrum2002?feature=mhee#p/a/u/0/0wG4T_NVsQg[/video]

UH-OH! There goes my CAD again...:hmm3grin2orange:

 

[FATGUY]

I'm looking forward to Getting the saw back in my hot little hands !
Got the 372 cleaned up and ready to ship ..... Just have to locate a decent box .
Heck, even the wife was impressed ! :msp_biggrin:

?

 

[parrisw]

Well I put a plug in it and it only hit 150, then I figured I should start it briefly to get some heat into it and lube the bore, after that it hit 160, so a little better but I want more. After I run a few tanks, its coming back apart.

 

[parrisw]

Here she is all ready to party!!!!! 33" bar and chain, ready to work.

 

[jropo]

Cool !
I NEED one of those testers!
Too bad about the comp., something don't sound right.:msp_ohmy:

 

[parrisw]

Cool !
I NEED one of those testers!
Too bad about the comp., something don't sound right.:msp_ohmy:

Nice tester, not cheap though. Nothing Snap-On is cheap.

I duno about the comp, I'm gona run some tanks through it and take it back apart. Maybe something happened to the rings? Maybe there was a burr on one of the ports and hurt the rings? Who knows.

 

[tree monkey]

[video]http://s155.photobucket.com/albums/s294/scottk66/?action=view&current=MVI_0053.mp4[/video]
385 with 205lbs