Is Anyone Interested In Seeing How I Port A 372XP

[nmurph]

I my mind that ramp helps speed the evacuation of the exhaust by reducing the turbulence as the piston begins to open and the charge spills out and it also helps to direct the backpressure into the cylinder as the piston closes.

 

[jerrycmorrow]

i'm in. thanks for the thread. i do my porting vicariously. at least for now.

 

[thomas1]

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.

Unpossible, saw porting did not exist before the internets.

 

[Stihlofadeal64]

I would drive to Tn to watch and learn.

Quite a few of us would, but it would probably be unnerving for the masters mind...

 

[sjames]

Quite a few of us would, but it would probably be unnerving for the masters mind...

How great would an instructional video be

 

[Trx250r180]

looks ok ..........for a Husky and all :msp_wink:

 

[wyk]

How great would an instructional video be

Not to step on my good buddy Randall, but I'll just leave this here:

1 The chainsaw guy porting - YouTube

 

[moody]

Not to step on my good buddy Randall, but I'll just leave this here:

1 The chainsaw guy porting - YouTube

If you listen to him he says 49 mm of material is removed from the cylinder. I wonder how he felt after posting that

 

[Blazin]

If you listen to him he says 49 mm of material is removed from the cylinder. I wonder how he felt after posting that

Not to mention it looked like he used a chainsaw for a Grinder

 

[Nitroman]

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 would second that emotion. Say, another thread on building a monster 3120? Just a thought. But gotta have good threads like this one too.:msp_w00t:

 

[Jacob J.]

I would second that emotion. Say, another thread on building a monster 3120? Just a thought. But gotta have good threads like this one too.:msp_w00t:

The 3120 is an under appreciated saw, because they're pretty heavy. I've had good luck with them though.

 

[madmarksolomon]

Here's the scale.......looks like 13.1 grams

that just looks illegal

 

[Blazin]

What brand and color scotch brites are you using Randall?

 

[RiverRat2]

In this shot you can see the exhaust step pretty well.


The exhaust is finished with oiled 180 grit emery cloth, then fine ScotchBrite.

Randy My old eyes just cant tell!!! Does the step/offset go all the way around the port or is it just on the bottom???

 

[tlandrum]

I just put a step in the bottom exhaust.

 

[Mastermind]

that just looks illegal

Leftovers from my youth...... :msp_unsure:

What brand and color scotch brites are you using Randall?

ScotchBrite brand in tan, red, and gray.

I just put a step in the bottom exhaust.

Yeppers......just the bottom.

 

[blsnelling]

I just put a step in the bottom exhaust.

Yeppers......just the bottom.

Hey, y'all better quit talkin'!:jester:

 

[Blazin]

ScotchBrite brand in tan, red, and gray.

Try the Mirka pads, they blow 3M away for getting in tight spaces....I know this for a fact. And they're only $20 a box. :msp_wink:

 

[Joe Kidd]

Actually Randy was actively looking for input from others, so I don't see how that was off-topic.

I took G's comment in jest. Maybe I'm misinterpreting.

 

[Gologit]

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.

It's not so much that you two don't get along. You and Brad have shown many times that you're more than capable of making an effort to keep things civil. You're both capable of disagreeing without resorting to insults and we appreciate that.


What we don't want, and what we won't allow, are the supporters and fans taking sides and taking potshots. It detracts from the intent of the thread and generally makes a mess of what was originally a good idea. It would be nice to have a build thread that didn't turn into a brawl.

Mrs.Arboristsite made it clear what the rules would be. They're not hard to follow. Any posts that don't directly address the thread and any posts that are deemed to be harassing or defamatory will be deleted and a warning or infraction issued.
We'd rather not have to do any of that. It's up to you guys.