so so true! it's only a 44cc saw used for firewood lol
it's not like it's a drag car or anything
i drew around the muffler gasket on graph paper and I get 2.375cm2
80% = 1.9cm2
85% = 2.02cm2
Existing hole is roughly between 1 and 1.1cm diameter as not completely round this gives exit area of between 0.79 and 0.95cm2, lets's just say 0.87cm2 for arguments sake.
If we aim inbetween 80 and 85% say 1.95cm2 then I need to drill a hole with an area of 1.08cm2
Therfore I'm guessing I need a hole that has a diameter of between 1.1 and 1.2cm
I'll stick with 1.1 to err on the side of caution which is more or less the same as original as you originally said lol
I will drill this on the top surface say right in the middle of the front panel. or maybe even drill a few smaller ones? What about even just a slit on the side lol?
now you've confused me lol. The area at the cylinder wall is the same size as the muffler gasket...? Can yo show me a pic of a cylinder wall? Reason for drilling vertically is due to strength, the location you propose is right on the corner. Smoke would hardly be an issue surely?Gareth, the 80% - 85% area rule is exhaust port measured at the cylinder wall not at the cylinder/muffler area. I don't know why you keep wanting to drill a vertical hole in the top of your muffler. Do you want to sendum smoke signals?
I didn't try to confuse you and I don't have a cylinder wall picture. A lot of newer saws have a larger muffler flange than cylinder/exhaust port area. I think I see how your muffler is held together. The outlet flange is crimped on the silencer pipe. I'd bet if you carefully filed down the outlet to below the crimp area it would slide apart. Then you could remove the silencer and increase the diameter of the outlet. The other muffler looked different. Does the baffle or some call it a diffuser look the same as the old muffler ?
without cutting it open again I would be unable to remove the silencer. i don't really wish to cut a brand new muffler open as I'd have to pay to have it welded up as I don't have the facilities.
This is why I thought capping the existing exit off and porting a new hole say 16mm would bypass the silencer. The only place for this is at the top or at the front. I'm guessing it would then need a screen though?
The diffuser looks exactly the same as the last and the muffler gasket mates up exactly to the exhaust port
Many mufflers are pressed together without being welded. Are you saying that you know for a fact that the front of your muffler is welded to the back?
yes, I have the old muffler cut open sat infront of me and it is indeed welded
Yes, I understand that the old muffler was welded but I'm asking about the new muffler. It looks just like the Husqvarna muffler I have where the front half is pressed into the back half. If you were to take a thin piece of metal and slide it between the seam of the front half and back half it would tell you if it were welded. I don't think that you can look at it and know.
It's welded, trust me ;-)
it's the bottom design which is shown as a complete unit
it's welded seriously
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