Porting a ms460

[MustangMike]

Every saw is different Jason, but my 77 cc saws like a lot more exhaust outlet than my 71 cc saws.

 

[jmssaws]

Every saw is different Jason, but my 77 cc saws like a lot more exhaust outlet than my 71 cc saws.

There not ported like these are
The old way I did them liked a big opening but it will hurt these.

This 460 is stronger than any I've done and is quiet to boot

 

[jmssaws]

When I say tiny I mean 125% or better

 

[RI Chevy]

The porting evolution continues. Lol

 

[jmssaws]

 

[Red97]

This saw adds to my belief that you don't need a high exhaust for rpm,I had it to 15.5 and still 4 stroking good,and it's got numbers I've never used or seen anybody use and has a tiny single outlet with a oem screen.
It's 104.5 125 75

Hmmm 60cc number lol.

Any other pics of the jug by chance???

Looks to be running very well. Good job sir.

 

[jmssaws]

Other than the pics I posted what do you want to see?

 

[Red97]

Other than the pics I posted what do you want to see?

I'll tag you in the thread I'm "brainstorming " rd 2.

 

[jmssaws]

Look how sweet the factory bevels is . lol
I've not seen one like itView attachment 35347

Anybody ever seen a oem cylinder like this? Enormous bevel and most of the port is plated.
Nightmare to port

 

[Red97]

Anybody ever seen a oem cylinder like this? Enormous bevel and most of the port is plated.
Nightmare to port

Not on many saws.

Hopefully ya got a lot to take out.. Once ya finally break through, she starts digging..

 

[jmssaws]

Not on many saws.

Hopefully ya got a lot to take out.. Once ya finally break through, she starts digging..

First oem I've seen that way.

 

[Red97]

Echo likes to do that. First one I ran into, just thought it was the cheap China burrs I was using..

 

[huskihl]

The bevelling almost looks chinese...only it's all straight and uniform

 

[jmssaws]

Took 50$ worth of burrs to port it

 

[huskihl]

Ouch. I use a double cut dremel burr for that stuff. It's got about 50 saws on it and still cuts ok

 

[drf256]

Anybody ever seen a oem cylinder like this? Enormous bevel and most of the port is plated.
Nightmare to port

Yes. Mustang Mike has one.

The intake didn't need a drop of work. Was huge, square, and beveled.

The tunnel and casting finish was not as nice as the D jug though.

I prefer the less Desirable Non-D chamber. Lower compression gives me more room to play. Plus I like a big central combustion chamber that's symmetrical.

 

[drf256]

http://opeforum.com/threads/porting-the-046-d-jug.314/

See post #44

Same jug I'd wager

 

[Deets066]

First oem I've seen that way.

I have one just like it. 046 jug

 

[RI Chevy]

Is it a Mahle or a Stihl? Or one in the same?

 

[Deets066]

Here's the only pic I can find, think this is it.