Yeah, yeah, yeah, lol. I've seen too many fantastic running saws with popups to throw the baby out with the bath water. If this saw is lacking, it's certainly not because it has a popup.
Inside the "Triple Nickel"
- Thread starter blsnelling
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Mastermind
Work Saw Specialist
Maybe the exhaust is too high?
lol
lol
Homelite410
Hack with a CNC Mill
My 2260 has a popup..... Runs like bad Mo fo. Thanks to one Stout guy!
Squeak has a popup too.......
Squeak has a popup too.......
I'm counting either the 562 transfer covers and/or 2260 bottom end to make the difference. I'm not touching the ports.
It seemed to like the timing advance. I ran about 3/4 tank through it cutting firewood. It runs perfectly, even with it about 30° outside. No signs of hesitation at all.
Mastermind
Work Saw Specialist
That's good info Brad.
I'm taking notes you know.
I'm taking notes you know.
I advanced it 5°. With this limited coil, it's hard to say how much it truly affected it. But it does seem to be holding more RPMs in the wood.
D
Deleted member 83629
Guest
wouldn't the saw be harder to start with advanced timing over retarded timing or is this different in a chainsaw.
I didn't advance it that far. It's a non-issue.
The Tsumura T&L arrived from up north. Thanks Dave! It'll look even better on the 2260.
I have an 044 that is unforgiving if you do not pull it over like you mean it. It's either me or the starter.
wigglesworth
Booned
Why can't you just taper the edge of the popup instead if it being 90 degree edge? Making it a ramp instead of a step?
wigglesworth
Booned
I had pics of one that I made just like an 028 super, with a high polished perfect bump in the middle. Of course I can't find em now. It was a welded popup. It wasnt much better as far as flow patterns go.
Mastermind
Work Saw Specialist
You can't deny the flow patterns B-rad.
I was the same way as Brad.
I remember saying....compression is compression.
I was wrong.
OnTheRoad
Collector of shiny things.
Thanks for posting your progress on this saw, Brad. Posts like this make this site worth visiting.The Tsumura T&L arrived from up north. Thanks Dave! It'll look even better on the 2260.
Side note: i couldn't help but notice your table would be fine firewood.
Randy you have said it before somtiaimes less is more. I have learn the same way. it is only mony in qestion. sory for my english.I was the same way as Brad.
I remember saying....compression is compression.
I was wrong.
The edges of the popup are at about a 45° angle.
wigglesworth
Booned
So, in your opinion, what does the atomized fuel do once it hits that angle? Is it launched twords the combustion chamber at 45 degrees?
All I know is that there are some mighty strong running saws out there with popups. IMHO, it's far from the most important piece of the pie. Does it make a difference? Maybe. However, I don't think it's a significant difference.
