Mastermind Meets The MS660

[booger1286]

Just asking for help and opinion here. If you take a cylinder and just raise exhaust without changing transfers, wouldnt you just be losing torque no matter what the exhaust timing is. My understanding during blowdown your just building up pressure that is acting against rotation of the crank until transfers open?

anybody

 

[NORMZILLA44]

I know I'm not Randy, but felt like stating my opinion........I think the Stihl labeled cylinders, fall behind a Mahle labeled cylinder. Casting finish inside the ports and proper port chamfering are found on Mahle labeled cylinderz. My Stihl labeled 660 cylinder had little to no port chamfering. IMO, the kolbenschmidt cylinderz are worse for quality. Them remind me of cheap aftermarket crap.

Good stuff, and thank you I appreciate it. Yep just collecting opinions, and feedback. Been curious for awhile if the stock quality had changed.

 

[tree monkey]

My grandfather was doing all this back in the 50's & 60's. How about them apples?

i think your apples are rotten
so how do you like those apples?

 

[HorseFaller]

Can't we all just get along.


---
I am here: http://maps.google.com/maps?ll=48.916304,-122.121212

 

[Jacob J.]

i think your apples are rotten
so how do you like those apples?

Everyone has an opinion...

Can't we all just get along.

We could, it's just that some folks haven't realized yet that none of this is rocket science.

 

[angelo c]

i think your apples are rotten
so how do you like those apples?

Well my grandfather was Al Gore and he invented the "innernet" so everybody could copy JJ's granpa's work....and if all you kids don't get along and play nice I'm gonna take my "innernet" and go home and none of y'all will be able to play...

now stop the name calling and go do some chainsawing.

 

[fir]

I have 660 with muffler mod and big bore kit. would like to now what to do with baffle and how to port this saw. I have no how on porting mx bikes and worked in performance auto machine shop so I will understand.:msp_thumbup:

 

[deye223]

opcorn:

 

[JakeLeg]

Looks and sounds great, Thanks for pics Randy.I can't hardly wait.

 

[Mastermind]

gee randy where did you get the idea for this?
iv'e been doing this style of mod for 10 years and you take the credit.
what a guy

For all I know you've been playing with your #### for ten years. Maybe you should post some of your work instead of spouting off at the mouth so ####ing much.

 

[roger m]

when did they stop using mahle cylinders on 660's ?

 

[mopar1rules]

when did they stop using mahle cylinders on 660's ?

Good question. I would like to know the same, but my assumption is that they stopped midway thru the years of them being labeled "066".

 

[Simonizer]

For all I know you've been playing with your #### for ten years. Maybe you should post some of your work instead of spouting off at the mouth so ####ing much.

Ohhhhhhhhhh Jeezus. lol. I think the gloves are coming offopcorn:

 

[mdavlee]

The mahle cylinders stopped sometime in 07-08 as far as I know. Some saws built in late 07 have the stihl cylinders.

 

[FATGUY]

Randy, if the exhaust port itself was untouched, what advantage is it to rework the flange?

 

[parrisw]

gee randy where did you get the idea for this?
iv'e been doing this style of mod for 10 years and you take the credit.
what a guy

You ain't the only one. Don't act like you invented it, cause you didn't. I've known about it for allot longer then I've known of you, just never bothered to do it.

You've only just come around here less then a year ago.


Good work Randy, that saw runs nice.

 

[wendell]

You've only just come around here less then a year ago.

Looks more like 10 years to me. :msp_confused:

 

[NORMZILLA44]

While on the subject, and I have always been curios who was the first to invent, chainsaw porting and modifications? Was it the Walker family? = Walkerized

 

[Jacob J.]

While on the subject, and I have always been curios who was the first to invent, chainsaw porting and modifications? Was it the Walker family? = Walkerized

People have been modifying chainsaws since chainsaws were introduced. The real big push though I would say started in the mid-50's which coincided with the karting
craze. A lot of what we know now about high-end two cycle performance was developed primarily due to karting. A lot of the karters here on the west coast also
happened to work in the woods so they took their modification ideas from kart engines and applied them to their saw engines. I know guys here locally that were
making their own pistons and intakes back then, my grandpa happened to be one of them.

 

[NORMZILLA44]

Good deal J.J, I had never heard that before, and never would have put that together. I don't know why but never would have put 2 and 2 together, on kart engine improvements being associated with wood saws. Good deal I had never followed Kart engines much must be why. But I do think it is a cool sport, and there was some history here.