262XP Day

[SawTroll]

This is exactly what I was thinking when I said you guys are over thinking. Randy does what he does because he WORKS so hard at perfection. TRIAL and ERROR!

Something more than just trial and error is needed, but it surely is part of it!

 

[blsnelling]

Randy, what's the biggest batch of saws you've done at one time like this?

 

[Mastermind]

Nice work, Randy. What 5 axis cnc mill do you use for those bridge/finger ports?

LMAO........I just use my hand......and a H28 Foredom.....

Randy, what's the biggest batch of saws you've done at one time like this?

This is a largest batch to date Brad.

I did 6 MS261s awhile back......that was the largest before this one.

 

[MarkEagleUSA]

This is a largest batch to date Brad.

Just herd 'em together like cattle!

 

[Fire8]

A friend wanting to run the legend,Randy has the Legendary SB2 he has been fixing the choke so he could give you a better video on what everyone 262's will be like I have gave him permission to run the piss out of it

 

[skippysphins]

A friend wanting to run the legend,Randy has the Legendary SB2 he has been fixing the choke so he could give you a better video on what everyone 262's will be like I have gave him permission to run the piss out of it

What does sb2 stand for ?

 

[Mastermind]

Steven Bryan 2

 

[Fire8]

What does sb2 stand for ?

Steven / bryanr2 that was his saw I talked him out of

 

[Mastermind]

I ran it against my 3750.

My 3750 lost.

 

[Termite]

Yes it does. It represents position of the piston vs time. When you increase the rod length the wave changes, the piston spends more time near TDC and BDC for a given change in crank angle.

A longer rod ratio produces a more uniform piston velocity throughout its stroke. Thus a long rod produces lower peak piston velocities/accelerations/jerk etc. Generally, intake flow stagnates at sonic velocity. And since intake velocity through the ports is relatively proportional to piston speed, intake flow benefits from reduced peak piston velocity.
Engine design variables like stroke/bore ratios and rod ratios is an excercise in compromise. For low speed engines, a long rod is especially beneficial. It reduces peak piston velocities/accelerations and inertia loads on the rod and crank bearings. A long rod also minimises rod angulation and thrust load/friction losses at the piston skirt.

And this is why a small block Chevy would wear out so fast. The rod length to stroke ratio on a 400Small Block was silly. The Rod/Stroke ratio on a 383 MoPar was outstanding.

 

[Fire8]

When the husq are done right it takes a perfect built saw to beat it
You win some and you lose some,most of the time it's the operator not the saw
And I'm not saying anything against you Randy, I've been there done that

 

[like2surf]

Me too Chris.

I've completely destroyed a bunch of jugs.

That's okay. Tore up jugs can be fixed with silicone or saline!

 

[M&Rtree]

Ported 562 vs ported 262. Same log.

 

[Mastermind]

That's okay. Tore up jugs can be fixed with silicone or saline!

Blue Goo?

 

[Mastermind]

Ported 562 vs ported 262. Same log.

I've got a ported 562, 262, and a 3750 to run.

We will have video.

 

[M&Rtree]

I've got a ported 562, 262, and a 3750 to run.

We will have video.

Randy you never disappoint! My three favorites.

 

[jl4c]

View attachment 417953

Beautiful work, but I'm having trouble seeing where the locating pin rides such that the ring ends don't snag. Probably apparent in another view angle.

 

[skippysphins]

Pretty quiet here today ??

 

[drf255]

View attachment 417953

Beautiful work, but I'm having trouble seeing where the locating pin rides such that the ring ends don't snag. Probably apparent in another view angle.

I believe that the 262 has a single ring with the gap centered over the intake port.

Makes it ideal for finger ports.

 

[Jon1212]

Discuss........