Chashowlett
ArboristSite Operative
Port clean-up, piston is modified to accept a two ring gap-less design of my own. Check out the video, any questions?
Dolmar 6100 just finished, pretty impressive!
- Thread starter Chashowlett
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Port clean-up, piston is modified to accept a two ring gap-less design of my own. Check out the video, any questions?
Chashowlett
ArboristSite Operative
Oh, .I had to blueprint the reed. And it is pulling 14500 rpm.
What the heck? The damned thing splits wood too! I did realize saws had reeds. Sounds mean.
What's a gap less ring. Steve
drumbum
ArboristSite Operative
Like a Total Seal brand.
cuinrearview
Red saw lover
drumbum
ArboristSite Operative
Picture a ring cut in half to make two rings, then placed in the groove with their gaps opposite.
I think the OP should explain this gap less ring. Steve
SOS Ridgerider
Ernie McCracken
How did you get it to run wot at 14.500? Mine is limited at 13.800.
Different coil? Also, very curious about the rings and piston mod.
Different coil? Also, very curious about the rings and piston mod.
Chashowlett
ArboristSite Operative
Rings came from another brand of saw, (some things are racing secrets), I made a tool to take .3 mm out of the land. And as far as the revs go , I measured at stock form and 12500 is what I got, I do hear it popping off on the chip, I thought it was a little lean, but my tach says 14500 free rev measured at the clutch drum. ¯\_(ツ)_/¯, maybe I have a crappy tach . And I did pin the second ring, I think the combustion pressure should hold it, maybe I should,. And the guy who was asking about the reed, yes it is part of the Strato-charging process.
drumbum
ArboristSite Operative
Did you add an indexing pin to the piston, or should I say "two Pins" if you widened the groove?
D
Deleted member 117362
Guest
We are guys, we need pictures. Please tear it back down.
Chashowlett
ArboristSite Operative
I gave two pin idea quite a bit of thought, and decided to not use a second pin, leaning towards the idea of the pin coming loose vs. ring moving to catch the exhaust. When I tear it down (soon) , I'll check on the movement. I have to do some more runs because I am experimenting with the gap and everyone has a theory on growth, my thoughts are if you use seasoned rings, they are pretty much set on how much they will expand and the gap could of course be smaller because new rings, and each Ring manufacturer has different formula for figuring gaps. I am cutting it close and went with .5 mm on a 47mm bore.....So far no binding.. The second ring should be ok because it's pushed down by the first one when it goes boom. We shall see. Pics soon
cus_deluxe
Commie Satan turd
What sort of tach do you have that measures rpms at the cluth drum? And it doesnt sound like its hitting the rev limitter, just sounds way rich to me...
D
Deleted member 117362
Guest
Tach may be off, just do not hear 14,500. It would be screaming.
Chashowlett
ArboristSite Operative
Light reflective off the drum and it's definitely 14.5k sometimes 15, because I checked accuracy on my truck...dead nuts. Compression is 225 now after a few runs and easier to start. The coil is grey.
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Chashowlett
ArboristSite Operative
I have a video of the tuning with the rpm and it's not rich by any means. Plug is a tinge grey and the top of the piston is shinny like new. I only had to enrich the main screen about a 1/4 turn past the original setting and the rpm climbed to almost 15 from 12.5. at those revs I can't tell by the sound, I have to use a tach.
