Not using a base gasket on barrel.

[beastmaster]

I'm replacing the piston on my461 Stihl with a pop up piston, would it be feasible to leave off the barrel gasket to further raise compression? I'm going to add an after market muffler mod also. This saw gets used a lot.

 

[old guy]

You wanna be checkin all that to make sure it fits!

 

[grizz55chev]

I'm replacing the piston on my461 Stihl with a pop up piston, would it be feasible to leave off the barrel gasket to further raise compression? I'm going to add an after market muffler mod also. This saw gets used a lot.

As old guy stated, check the fit, if the squish is less than .020, you will have serious problems.

 

[Woodslasher]

I'm replacing the piston on my461 Stihl with a pop up piston, would it be feasible to leave off the barrel gasket to further raise compression? I'm going to add an after market muffler mod also. This saw gets used a lot.

Two things, first I seem to recall reading something about how the screw heads on the stuffer might need to be ground down a little if you do a base gasket delete. Second, for the muffler mod I would just get one of the dual port muffler covers from @huskyslinger. I am running one of those covers on my 461 and I really like it.
"The flange screws (for the piston tower/stuffer) hit on some of them. Can remove the 2 screws and grind .005" off them or so. A straight edge will tell you if they're in the way."

 

[Yotaismygame]

Woodslasher is correct. Grizz55chev is being a little extreme with the squish. Really you could go all the way down to .016" or even tighter but if you don't have to I would stick with .018" and higher for sure.