262XP Day

[cuttinties]

I used a lot of pop ups when I first started.

I wonder if it caused this detonation issue? It seems that the edge of the popup could possibly divide the flame front and leave unburnt gases at the outer edge that could cause detonation.

Laminar flow works with or against. With no strato ports separation of burnt and unburnt is less, so detonation is a possibility with a pop up. Get a little pooling on the flat side of the piston and bang.


All speculation of course. I'm just butt hurt you're hoarding 262s.

 

[Mastermind]

It does disrupt the flow. Was this your saw?

No.....it was one I built several years ago for a tree killer. It's been well used.

 

[Mastermind]

Laminar flow works with or against. With no strato ports separation of burnt and unburnt is less, so detonation is a possibility with a pop up. Get a little pooling on the flat side of the piston and bang.


All speculation of course. I'm just butt hurt you're hoarding 262s.

Pics of the butt hurt?

 

[super3]

No.....it was one I built several years ago for a tree killer. It's been well used.

Bit of bad fuel.

 

[cuttinties]

Pics of the butt hurt? [emoji14]icture:

 

[Deets066]

Pics of the butt hurt?

 

[Mastermind]

Bit of bad fuel.

Very well could have been Mike.

Oh my !!!!

 

[cuttinties]

Very well could have been Mike.



Oh my !!!!

Hey I meant to call you. If you happen to have an 260 cylinder laying around could you measure the cylinder base dimensions for me? I'd hate to buy one just to measure it.

 

[SawTroll]

It does disrupt the flow. Was this your saw?

Pop-ups seems like a last ditch attemt to improve compression - but does anyone really know that max compression on the top really improves power? I'd think that case compression, transfers, carb capasity and mufflers are more important - but then I am not an "expert".....

 

[cuttinties]

Pop-ups seems like a last ditch attemt to improve compression - but does anyone really know that max compression on the top really improves power? I'd think that case compression, transfers, carb capasity and mufflers are more important - but then I am not an "expert".....

Well I'll further confuse you. I've got a saw I purposely built with 150lbs of compression. Just happens to be a 268. But I'll confuse you a little bit more. I cut the squish band flat and set my clearance at .020. Any guess as to why I did this?

 

[bryanr2]

I thought Bryon2 / Steven had that spot taken already!

Danny hounded me for months to get my finger ported 262xp. I finally consented to sell, since I had 2 mint ones put up. But then I bought Wiggs minty one, and took another as partial trade for my MMWS362cmr.

 

[bryanr2]

My 562 mmws run awesome its just a very smooth saw .
262 someone in this post got me hooked on them I can't wait to get my back to try it against the 562.

Theres no comparison between the 2. Id rather have a 2 series saw than any current offering.

 

[SawTroll]

Well I'll further confuse you. I've got a saw I purposely built with 150lbs of compression. Just happens to be a 268. But I'll confuse you a little bit more. I cut the squish band flat and set my clearance at .020. Any guess as to why I did this?

Surely - but getting a decent top end compression isn't the same as hunting for an extreme one.

 

[cuttinties]

Surely - but getting a decent top end compression isn't the same as hunting for an extreme one.

Compression serves a purpose. Extreme is relative to the end use. Compression is resistance and every action has an equal reaction.

 

[treeslayer2003]

minor derail........will a 262 jug direct bolt on a late 61? and if so will it be a great improvement?

 

[cuttinties]

minor derail........will a 262 jug direct bolt on a late 61? and if so will it be a great improvement?

No

 

[cgraham1]

Sir Randall,

Are any of those 262's from Utah?

Jon, mine is headed to Tenn. in June. It came from Utah.

 

[treeslayer2003]

No

but a 268 will?

 

[cuttinties]

but a 268 will?

Depends on what year. But the 61,266,268,272 are the same chassis. But in the later years they introduced an intake boot amongst other changes.

 

[Nitroman]

View attachment 417414

I like this photo, I like it ALOT!