muffler mod

Guys, I've searched and found so many different versions of modding MS290 mufflers that I gave up on trying to figure out who was right. Some have opened up every restriction so much that there could not possibly be any back pressure and some haven't while all report "runs better than ever"...

Anyone have any good pics of the muffler? Specifically is the cat central to the muffler like the cs-400, or is it offset like the cs-450? Is it easy to put a good muff mod on this one? Thanks.

Hello all, Long story short, I bought an Echo 450p and am using it to try my hand at modding a saw. This may be a little drawn out as I'm going to work on it as time allows. Initial plans are to record a baseline, muffler mod, base gasket delete, possibly cutting cylinder down, port and...

Hey Gents, It's cold and rainin out so what should I do? Tear down my 361! I like to keep 'er clean. I want to do a muffler mod. I have a gas leak. After running, when the saw sits on it's side, fuel fill up. 1. I pulled the spark plug wire off and the plug boot came off the wire. I assume...

I recently acquired an Echo CS-590 Timberwolf Chainsaw. As promised, I intend to measure the muffler on my flowbench and then measure the incremental improvements as a result of the common "muffler mod" alterations. Here's my saw. I purchased it last week at Home Depot. It was a "return"...

Checking on others perspectives when considering a p85 partner on a mill. Running factory fast chew'n ash with a 20" But.... 32". ??? Muffler mod? Thanks all

I have a echo cs 510 slug n jug in great shape ran great and made good power. But the exhaust canister cracked around the mounting surface of the jug. In my opinion the old can is not worth fixing. I have 2 options in mind. Option 1. Buy a new or used stock muffler and do a muffler mod on it...

A few people have asked for a bit of a tutorial on louvers. So i have the perfect candidate. This Solo 667SP. So not every saw is a perfect candidate, so it is a selective thing. Not a great deal was going to help opening up the standard deflector and I might of been able to squeeze a...

Thanks to everyone here and all the great help and info I went ahead and done my first muffler mod. I didn't do a lot of recorded before and after videos. But I am very happy with the gains. The throttle response is snappier and it seems to be able to keep the rpm through the cut better. Not...