Been working on this exhaust
- Thread starter Evan
- Start date
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That screen might just give you enough restriction to make it run!
I like new ways of thinking. Look forward to hearing how it does.
Looks like it runs good , think it pulls any harder ?
Sounds like it likes it.
Coronavirus has me down but watching that video makes me want to go cut. Its definitely breathing good and it sounds like its tuned well.
I hear that , fell off a machine I was working on the Monday before thanksgiving twisted my ankle bad was off for for the week and a couple days kinda rushed going back to work the swelling just came down 4 days ago stile hurting trying to work been ruff . Was out running my saws in the garage Monday night dying to go out cutting
thompsoncustom
ArboristSite Operative
a bolt on cpi racing pipe adds 60% to a stock 660 which is amazing gains for a bolt on part.
i wonder if you could make a mini version of a tuned pipe and still get gains. I'm afraid what you would run into would be a shift in the power band and maybe to the wrong area I'm sure there a reason they don't make them smaller but hey if you could add 30% for half the size it might be a fair trade.
Im working ideas of real pipe in my head maybe 1"- 2" id then back down to whatever I ended up at. Would be alot of work. Weld then debur inside each pie where transition in size happens then weld next pie on finish inside then next untill full chamber is done and back to alittle smaller then header size.
thompsoncustom
ArboristSite Operative
I know there was a member on here that made a race pipe prototype out of copper just because it was easier to build for testing so that may be a option for ya. seems like copper would be much easier to work with for testing purposes.
Evan
Nice work. I’m curious to see the comparison with the latest expansion muffler vs pipe.
Where in ID? I’m from Bonneville County.
JQ
Nice work. I’m curious to see the comparison with the latest expansion muffler vs pipe.
Where in ID? I’m from Bonneville County.
JQ
thompsoncustom
ArboristSite Operative
looks good. you cut with it yet?
Won’t that left side be a pita when cutting sideways?
thompsoncustom
ArboristSite Operative
Looks a lot like the mods I did on my china ms260 muffler, removed baffle and had hole placement about the same as yours minus the pipes. I measured and made my openings a total 150% of the bore after I ported it. Runs great and noise is not bad at all no need for ear protection on the 50cc saw.
Be curious to how it preforms and sounds compared to your last model.
