2100 Racer

[funky sawman]

I just picked up a 2101 husky "RACE" saw. I pulled it down to see what was done and found an interesting piston ring on the piston. the top edge of the ring has grooves evenily spaced about 1/2" apart all away around the top ring only!!! What is the purpose of this?

 

[Zombiechopper]

probably to hold oil

 

[funky sawman]

This is what it looks like

 

[funky sawman]

To give some background on the saw:
1987 husky 2101xp
heavily modded ported cylinder
no head gasket, head milled down, chokeless carb with opened up venturi,
tune pipe, no cooling fins on flywheel LOTS OF COMPRESSION, broke the starter off the saw trying to start it!!!

 

[minnnt]

pics pics pics!!!

 

[Bill G]

Well????

 

[Andyshine77]

This is a guess and only a guess. The grooves allow combustion pressure to travel behind the rings forcing them outward thus providing better ring seal and better compression.

 

[Little Al]

This is a guess and only a guess. The grooves allow combustion pressure to travel behind the rings forcing them outward thus providing better ring seal and better compression.

On some APRILIA 2stroke race motor cycle engines+some ROTAX microlight motors they have similar rings, as Andyshine says it`s to aid compression by getting pressure behind the rings

 

[sachsmo]

Yup,

Aids ring seal, some racing pistons have small holes drilled around the perimeter to the ring lands to accomplish the same thing.


Hmm

 

[Tzed250]

.


The term is "Gas Porting"...


.

 

[gink595]

Is this a MVP saw?

MVP2100

 

[sachsmo]

Hey Gink,

that MVP needs a full wrap.

 

[gink595]

Probably pick up a couple tenths:biggrinbounce2:

 

[PLAYINWOOD]

That is one well traveled saw.

 

[sachsmo]

What,,,,,,,,,,,,,or Whom is MVP?

 

[WoodChuck'r]

Tearing down race saws to have a peek inside.... Now THERE'S a good idea....!!

 

[gink595]

What,,,,,,,,,,,,,or Whom is MVP?

Marcel Vincent Performance is who and what it stands for. As legend has it he was probably one of the best saw modders there was, as I understand he was a engineer for Ski-Doo and built saws 20+ years ago that are still fast today. If that is the 2100 I think it is I hear it is one fast mutha!

 

[sachsmo]

Marcel Vincent Performance is who and what it stands for. As legend has it he was probably one of the best saw modders there was, as I understand he was a engineer for Ski-Doo and built saws 20+ years ago that are still fast today. If that is the 2100 I think it is I hear it is one fast mutha!

That sure is a bit more catchy than Gink performance eh?

 

[Chopwood]

Is this a MVP saw?

MVP2100

If that is the saw I think it is with a new pipe, I know it well.

 

[L.R.]

That's the most Low-Buck-Tech saw i ever saw!!!