I have a Stihl 461. It is all stock. Is there any benefit to adding a dual port or bark box muffler. Is it down to cool factor that it sounds cool by loudness or a true performance enhancer!
Benefits to adding a dual port or bark box muffler
- Thread starter rob066
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I have found that any time I have made the exhaust exit hole or holes larger than stock on a more modern saw there was a gain in performance, it depends on the exit hole position if it is obnoxiously noisy or not . I have not used a bark box though.
They are very loud. According to Treemonkey they decrease torque vs opening up the existing outlet.
I should add I have a Bark Box on my 400C. It's going down the road for next season.
The Straight shot is even more obnoxious noise wise.
The Straight shot is even more obnoxious noise wise.
Should also get the heat out of the engine faster. The bark box seems to be one of those things where people love them or hate them.
GASoline71
Mr. Nice Guy
My stepson keeps wanting to put one of theses bark boxes on his 046. His 046 already has the stock large port and a stock dual port cover as well. I told him forget the bark box and just tune properly what he has.
My 10mm pin 044 (1993) has a stock large port exhaust and no dual port and runs like a champ without any extra holes in the muffler.
Gary
Loud sucks when you been doing this too long!
Most of my work saws under 90cc have single large or enlarged factory outlets. It doesn't work well on everything but I've notice two things constantly with side outlets vs front outlets. The forward front outlet is always noticeablely much louder with a higher pitched exhaust note and one I personally don't like. The larger saws near 80cc seem to need a dual outlet once other things like port work have been done. They also use more fuel compared to the single outlet mufflers I do. As of this past year most people wanted side or top outlets highly modified for bucking saws in the 50 to 67cc range and the dual side or top outlet mufflers no doubt have more grunt imo. The front cover exit on the bigger saws seems to work as well as any side or top outlet duel port configurations with added noise. Pete's Echo a 7310 here now got the top outlet reworked and a side outlet over the chain added on. My goal was to add flow but not a ton of noise on the operators side or in the front although this particular saws has Gordies three point west coast dogs on it with plenty of room up there in the front. It lives at a large log pile nothing more at all is done with it. No felling limbing or stumps will ever be cut so it needs to push chip away from the operator and the noise is tolerable with earmuffs. My front exit 90 plus cc saws are not. You need plugs and muffs or you will wish you did at the days end when milling.
I love the straight shot on my 462. It is loud as heck though.
I think my new 500 I is pretty damn loud stock.
I haven’t heard a 500 run yet. Only seen 2 in the store.
Well I tell you what it is a great cutting saw and fairly light. Buy one.
What is going down the road the Bark Box or the saw?
Got one fresh new just broke in 500I coming from a local that's about to get lighter and louder, again. He already added the noise maker front cover so it's not my decision but we might revisit the stock cover and another side outlet. It's being built to carry the 28 or swap out to the 36 when needed. Fast won't be part of this package and loud isn't my decision here. If it were me the front cover would be gone. Triple outlets shouldn't be needed here.
OP you will get an advantage by letting out more exhaust gasses faster.
The simple answer you may be seeking here
Do it if it suits your needs. Those are just simple effective bolt-on parts.
Dont have a dyno but my butometer says single ports run better not that a dual port doesnt have gains over stock.
Heres my 44 with factory port enlarged and reworked still retains spark screen
372 same deal 1 port has spark screen
Heres my 44 with factory port enlarged and reworked still retains spark screen
372 same deal 1 port has spark screen
Going by Joe and his Dyno.
Think he said 5% with DP cover like oem or afm over stock front cover.
Then a straight shot by Egan Performance is 10% better then stock.
https://eganperformancesaws.com/
Think he said 5% with DP cover like oem or afm over stock front cover.
Then a straight shot by Egan Performance is 10% better then stock.
https://eganperformancesaws.com/
You have too many cylinders on the shelf. Now that we know about your hoarding issues it's best to let them go now. You can PM me for more advice or my address anytime now.
Tic toc
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