Inside the "Triple Nickel"

[blsnelling]

Oh, man. Now ya done it. I know a guy here has a photo of it shows the flame unpropomagating and going all wompy eyed on ya wid da pop ups.

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.

 

[Mastermind]

Maybe the exhaust is too high?

lol

 

[Homelite410]

My 2260 has a popup..... Runs like bad Mo fo. Thanks to one Stout guy!

Squeak has a popup too.......

 

[blsnelling]

I'm counting either the 562 transfer covers and/or 2260 bottom end to make the difference. I'm not touching the ports.

 

[blsnelling]

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]

That's good info Brad.

I'm taking notes you know.

 

[blsnelling]

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.

 

[Deleted member 83629]

wouldn't the saw be harder to start with advanced timing over retarded timing or is this different in a chainsaw.

 

[blsnelling]

I didn't advance it that far. It's a non-issue.

 

[blsnelling]

The Tsumura T&L arrived from up north. Thanks Dave! It'll look even better on the 2260.

 

[wyk]

wouldn't the saw be harder to start with advanced timing over retarded timing or is this different in a chainsaw.

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]

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.

You can't deny the flow patterns B-rad.

 

[LowVolt]

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]

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?

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]

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]

The Tsumura T&L arrived from up north. Thanks Dave! It'll look even better on the 2260.

Thanks for posting your progress on this saw, Brad. Posts like this make this site worth visiting.

Side note: i couldn't help but notice your table would be fine firewood.

 

[veljko]

I was the same way as Brad.

I remember saying....compression is compression.

I was wrong.

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.

 

[blsnelling]

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?

The edges of the popup are at about a 45° angle.

 

[wigglesworth]

The edges of the popup are at about a 45° angle.

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?

 

[blsnelling]

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.