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How to mod exhausts?

adamkaye123

By adamkaye123
in Chainsaws

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spudulike Grand Master

spudulike

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The 'optimum size' has more to do with noise in regards to gain. In most chainsaws, you can make huge holes in the muffler and still see gains. However, huge holes often mean huge noise. So when they usually talk size, it's more about balance than ultimate gains.

 

Thats about right Wes - Stubbys one shook my fillings out:lol: and had a complaint from a fella down the road:001_rolleyes::lol:

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Hotrod81 Rising Star

Hotrod81

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Thats about right Wes - Stubbys one shook my fillings out:lol: and had a complaint from a fella down the road:001_rolleyes::lol:

 

Am I not right in saying that Stubby is close to being an OAP so is probably deaf anyway.:001_smile:

Eddy_t Grand Master

Eddy_t

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Am I not right in saying that Stubby is close to being an OAP so is probably deaf anyway.:001_smile:

 

 

Yup :lol:

 

 

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Stubby Grand Master

Stubby

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Am I not right in saying that Stubby is close to being an OAP so is probably deaf anyway.:001_smile:

 

Don't mumble ...Speak up man :biggrin:

wisecobandit Mentor

wisecobandit

Posted
Posted

80-90% of the exhaust port area. Bigger than that gain is minimal but noise does become a factor.

That said some smaller saws can actually be louder than some larger saws.

 

A single 1" pipe is ideal on the likes of 372xp's etc as its 85% of port size to give a rough idea.

spudulike Grand Master

spudulike

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Am I not right in saying that Stubby is close to being an OAP so is probably deaf anyway.:001_smile:

 

I couldn't possibly say...although he did ask if I did senior citizen concessions when I did his 390XP:lol:

 

Sorry Andy:blushing:

wisecobandit Mentor

wisecobandit

Posted
Posted
I couldn't possibly say...although he did ask if I did senior citizen concessions when I did his 390XP:lol:

 

Sorry Andy:blushing:

 

You told me he didn't post it he was to tight?

He was happier to use his free OAP bus pass and hand deliver it :laugh1:

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