MMWS/CROSS PERFORMANCE MS661 TOP END

[Gentleman]

I'd like a 394 length piston with the locating pins location of the 395. This way they could make a 394 and 395 piston with the same casting. Then I'd just make something of the same design for a direct replacement 2100 piston, it would gain a lot of performance with just a piston swap.

Pistons are way cheaper to make than cylinder kits.

 

[mdavlee]

I'd like a 394 length piston with the locating pins location of the 395. This way they could make a 394 and 395 piston with the same casting. Then I'd just make something of the same design for a direct replacement 2100 piston, it would gain a lot of performance with just a piston swap.

I've been talking to someone about making a 56mm piston. It was going to be single ring.

 

[Stump Shot]

We need to make a kit to turn the 372 xtorq into a old school 372XP. With some improvements of course.

That ought to go over big.

 

[Mastermind]

It that possible?

Absolutely.

 

[srcarr52]

Pistons are way cheaper to make than cylinder kits.

You have to have a piston for a cylinder kit anyway so it's a good first step. I'd be happy to consult with you and Cross on anything you guys decide to produce.

 

[Stump Shot]

Absolutely.

Well, don't just stand there with that gun in yer hand, get-r-dunn. LOL

 

[srcarr52]

Well, don't just stand there with that gun in yer hand, get-r-dunn. LOL

Calm down, good things take time.

 

[RI Chevy]

Like fine wine, whiskey and bourbon.

 

[Stump Shot]

I was just funnin' a bit.

 

[Duce]

Like fine wine, whiskey and bourbon.

I do not drink. Hope, Mr. Evans is out shooting videos. Nice work, Sir.

 

[Stump Shot]

You have to have a piston for a cylinder kit anyway so it's a good first step. I'd be happy to consult with you and Cross on anything you guys decide to produce.

Seriously though, I do have a fair bit of 288 bones, I could start building a bottom end pert near any time to do some R&D testing. Also have a fair bit of 272's and could probably scratch together a 372 as well.

 

[Adirondackstihl]

I'm here now

 

[Mastermind]

Calm down, good things take time.

Fact

I do not drink. Hope, Mr. Evans is out shooting videos. Nice work, Sir.

I was........gotta touch up this chain. I must have hit something with it last time I cut with it.

 

[David Young]

I say 372 kit next too.
But not for an all out hot rod just a bump in power and keep in mind the lower ends are weak.
comp in the 165-175 range and almost stock porting other wise 100 122 78.
I know mike has talked about a lighter piston for relief on the bottom.
maybe the old Wayne trick of a double tapered stihl wrist pin.

 

[Mastermind]

Dang.......I had to deburr the drive links. Shaun's chain holders are dead on in width. Makes chain maintenance a top priority. Gullets and rakers now. lol

 

[Adirondackstihl]

Shaun's chain holders

Please elaborate

 

[srcarr52]

Please elaborate

Chain holders for Silvey and Simington grinders. Made from steel with tight tolerances to minimize chain rocking.

 

[Mastermind]

I say 372 kit next too.
But not for an all out hot rod just a bump in power and keep in mind the lower ends are weak.
comp in the 165-175 range and almost stock porting other wise 100 122 78.
I know mike has talked about a lighter piston for relief on the bottom.
maybe the old Wayne trick of a double tapered stihl wrist pin.

Pretty much the same plan on these 661 jugs. Stock port widths. Close to stock numbers, and a small bump in compression.

 

[Mastermind]

First video is uploading......the OEM saw. It took it a couple of cuts to get dialed in, I was starting to wonder if I had the timing too far advanced. The key is at .050".

 

[junkman]

Randy ,do you have a stock saw there to run the aftermarket against ?That would be a good comparison to market these to show the bolt on power increase .