parrisw
Tree Freak
Yup, its a pain in the arse! I heat the seam up till red then pry it open on 3 sides then slide the half's apart.
Modding the Dolmar 7900
- Thread starter parrisw
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Yup, its a pain in the arse! I heat the seam up till red then pry it open on 3 sides then slide the half's apart.
Freakingstang
Doctor Freakinstein
yeah... I ruined the 5100 muffler doing that without heat... took a couple to figure out the technique...
parrisw
Tree Freak
Right. You could just weld the halves back together after, but I just re-crimp. I hate leaving the baffle in there.
Anthony_Va.
XPW Fan Club
Lol, Yea stuff like that will just eat away at you. It's like an MS361 muffler. Some baffles, removal is a must. It bothers me to think about it in there stopping my saw up
Mastermind
Work Saw Specialist
Pin placement is not as favorable on the new piston. I like em both just fine.....
Lol, Yea stuff like that will just eat away at you. It's like an MS361 muffler. Some baffles, removal is a must. It bothers me to think about it in there stopping my saw up
361 mufflers suck.
parrisw
Tree Freak
Cool, thanks Randy. I'll just use what I got then, not very wide skirts, but get the ports in the right spot, should run good.
The ring locating pin screws you on the new piston by interfering with the intake port. For timing purposes and port shape, the older piston seems better.
Mastermind
Work Saw Specialist
Wide ports ain't everything.........shape and placement will matter most. On the 7900 don't get happy raising the transfers. They run the best with 28-30 degrees of blowdown.
parrisw
Tree Freak
Yup, I was planning on 28*, I ran 30* on the BB I think, and fled that they could come up a little more.
SawTroll
Information Collector
As I understand it, the 7900 is far from the most modification friendly saw ot there....:msp_wink:
Dolmar makes their saws maxed from the start. So you don't have to drop another $250 into them! :msp_smile:
I just like to get him going:msp_w00t:
parrisw
Tree Freak
There is gains to be had, just got to work for it.
Mastermind
Work Saw Specialist
Not true at all. No matter what "they" say. :cool2:
Hedgerow
HACK
The good things in life can take a little more work... A 7900, if done well, will make you smile...
SawTroll
Information Collector
Sure, but there just isn't enough metal to work with, in some important places - at least that is how I understand it...
Mastermind
Work Saw Specialist
[video=youtube;V9skmQuOPpM]http://www.youtube.com/watch?v=V9skmQuOPpM&feature=plcp[/video]
