Take Out Baffle Or Not?

[huntingbob]

hello, Ive searched and have read both ways. Im putting a duel port cover on my ms460 muffler and am opening the existing side exhaust.
Do I remove the inside baffle in my muffler or leave it in there? I dont want to sacrifice any reliability ( I'm just cutting firewood ) but want to have fun doing it. I have an inside baffle that looks like a ramp, it has no holes in it now.

 

[Lawn Masters]

I'd say bye bye to the baffle, re tune the carburetor to adjust for the increased ability for the saw to breathe, and be happy.

 

[CaseyForrest]

I have two 460's. Both still have the baffle, I cant see where the internal baffle hinders exhaust getting out of the muffler. I also cant see where taking it out would hurt anything either, probably make it a little louder. Just putting the DP cover on brought the rpm's up to 14,500. I added the cover when the saw was new.

 

[Lakeside53]

I don't think the baffle makes much difference at all (other than making it quieter) - I'd just leave it, or, if you have the muffler off, drill a couple of big holes in the end. Add up the area of all the holes in the baffle; they are plenty big enough.

You should increase the hole (slot) in the new dual port front though - it's way to small on the 460. The 066 dual port muffler is fine though as it's "pre-epa".

 

[CaseyForrest]

Lake, how big should we go? And taking into account the hole on the side of the muffler is left stock size?

 

[Lakeside53]

I don't remember as it's been a while, and I don't have one in front of me... Figure on about 75-80% of the area of the cylinder muffler port, so subtract the existing hole then figure out the enlargement of the front cover slot. Then publish it all so we all have a future reference that can be searched on! It's easier to make it bigger later than to make smaller, so sneak up on it if you are unsure.

I posted the 066 sizes a while back.