Mac Eager Beaver
- Thread starter justshootme
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eyeinstine
ArboristSite Operative
oakman said:
2 strokes, and even 4 strokes will run without mufflers.. But using the exhuast as a tuning aid, you can get more power out of the engine. It can also be used to help control emmissions, etc.. Not to mention, open exhuast is just too loud..
But yes, 2 strokes will run without exhuast. They may not run good, unless designed and fueled from the get go to be run without exhuast.
Ron
njforestfire
ArboristSite Operative
njforestfire said:
As I said before....to run PROPERLY (best performance), you will need a pipe or muffler of some sort.
njforestfire said:
John, 2-strokes can be tuned to run perfectly without ANY back pressure. Race bikes and karts ran megaphones for years and years and performed wonderfully. They were just insanely loud and people had a hard time running events. I'm not saying that a tuned pipe won't help, at a specifiv RPM, but they are not NEEDED. If they were, using your logic, all two strokes would have them and they don't.
John.....
rubberducky
ArboristSite Operative
Try an old A C 341 for a tractor, just for experimental reasons. Hey, it works fine in mine.
No I dont use it in my chainsaw just always wondered if it would work. Runs like a "champ."
No I dont use it in my chainsaw just always wondered if it would work. Runs like a "champ."
njforestfire
ArboristSite Operative
whatsnext said:
John - I don't disagree with you about them being able to run without pipes/mufflers....my point was for the best performance that one should have on. Todays saws need back pressure to run properly - including the Eager Beaver. When we first starting karting in the late 70's early 80's, we were just getting into the tune pipe thing. I wasn't around when they ran those megaphones. My father might have some old pics of those karts with the 'phones' on them.
njforestfire
ArboristSite Operative
John - I would think it would be safe to say that both you and I would NOT run our saws without mufflers...
That is safe to say but many people who post here are 'modding' mufflers to reduce back pressure. You keep insisting that 2-strokes NEED back pressure to run 'right' and that is simply not the case. We all give up performance in order to keep our hearing and to not bother the folks next door. That said, this whole discussion started because the guy's Eager Beaver was exibiting signs of a hyper restricted exhaust and, temporarily, taking the muffler off would have been a very quick and easy test. Once he knew whether or not the exhaust was clogged he could have replaced it. Five minutes and $0. My kind of test.njforestfire said:
John.......
njforestfire
ArboristSite Operative
whatsnext said:
Then please explain to me why modding the muffler does not improve the performance of the saw..when all of us know (and I have done this and it does work) by reducing the back pressure in a muffler increases the HP slightly and runs better.
So you are saying that taking the muffler off it will run just as good as with it on? If that is the case, let you and I do a timed cut with the same saws - your with no muffler and mine with and let's see who cuts faster.
The 'run right' is my meaning of optimum performance...saws DO need back pressure. If they didn't, the mufflers would just baffle the noise without the restrictions.
John, You really must not be reading my posts. We all mod mufflers because it does work. We get more power and also more noise. You are really making my point for me that reducing back pressure is a good thing performance wise. Mufflers work by modifying the pressure curve of the exhaust pulse not by 'baffling away' the noise.njforestfire said:
njforestfire
ArboristSite Operative
Agreed!!
