Is Anyone Interested In Seeing How I Port A 372XP

[Mastermind]

Hopefully you can see the bevel/radius I put on the port edges in this shot.



I think the life of the rings depend a lot on how slick these edges are. The last step is fine ScotchBrite around a bore hone to really get this area smooth.

 

[Mastermind]

I better get to work........but if anyone cares we can talk about different carbs for the 372 later.

 

[sjames]

are there any similarities between the 372xp and a 268xp? I have 2 and would like to muscle 1 of them up.

 

[sunfish]

I just did one.....

http://www.arboristsite.com/chainsaw/230531.htm

Thanks man!!!

 

[duramax99]

As far as carbs ive used stock and 390 carbs they defiantly seem to run better with the 390 conversion.

 

[bryanr2]

I'm just thinking out loud hereotstir:....... but I think "EVERYONE":msp_biggrin:...... especially "someone":msp_wink: would be interested in a "How Mastermind does big muscle saws". Could possibly expose the tricks on a rebuild and port of a 2100cd?:jester:

 

[blsnelling]

Good.


Now, back on topic...Randy, how about some more info on your build.

Randy asked for input. I was simply having a conversation about the saw in question.

 

[Mastermind]

I'm just thinking out loud hereotstir:....... but I think "EVERYONE":msp_biggrin:...... especially "someone":msp_wink: would be interested in a "How Mastermind does big muscle saws". Could possibly expose the tricks on a rebuild and port of a 2100cd?:jester:

I'll be doing a thread on your saw Steven. It's no that often anymore that we get a nice example of the 2100.

Randy asked for input. I was simply having a conversation about the saw in question.

I think you and I are no longer allowed to post in each others threads. I really don't understand that.....but also don't want to get the boot as a site sponsor. I think Jens email was the site owner's last effort at curbing the issue of member harassment as it was being reported to them.

 

[mtrees]

Please!! I for one don't wish to lose either of you!!

 

[boxygen]

Randy asked for input. I was simply having a conversation about the saw in question.

Seemed like a pretty harmless comment??? I guess the general public is missing a piece of the puzzle here:confused2::msp_confused:

 

[treeslayer2003]

Seemed like a pretty harmless comment??? I guess the general public is missing a piece of the puzzle here:confused2::msp_confused:

I think prolly so, but like mtrees said we don't want to lose either of them. so we should jus let it go.

 

[pops21]

Hmmmmmm????

 

[pops21]

Randy I remember when you first posted about the step in the exhaust but I thought the conclusion was it was not worth the effort. What difference do you see between the step and no step saws? Also if there is a difference whats the theory behind it. For me I see it as causing unwanted turbulance. Causing the gases to swirl comming out.

 

[Officer's Match]

Please!! I for one don't wish to lose either of you!!

Yeah, not enjoying some of this, um, stuff.

 

[moody]

Randy I remember when you first posted about the step in the exhaust but I thought the conclusion was it was not worth the effort. What difference do you see between the step and no step saws? Also if there is a difference whats the theory behind it. For me I see it as causing unwanted turbulance. Causing the gases to swirl comming out.

It's for gas evacuation I know that much. But I like your question.

 

[mt.stalker]

It's for gas evacuation I know that much. But I like your question.

The step allows the exhaust gases to expand quicker IMO .
The Sweed's have been using this design for at least 33 yrs , as evidenced by my 1980 Jonnyred .

 

[barneyrb]

It's for gas evacuation I know that much. But I like your question.

Anti reversion..........

 

[mtrees]

Randy is quiet, must be bolting her together.

 

[Mastermind]

Randy is quiet, must be bolting her together.

Nope......porting a 359. I'm still waiting on a few pieces.

 

[Jacob J.]

It's for gas evacuation I know that much. But I like your question.

Ace Morgan, who was a legendary builder from this area, had been using the stepped exhaust since the mid 80's. He also used a "rafter port" which is a thin line cut into the bottom of the exhaust port to help with scavenging. His saws ran really well.