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 How to get Hemi Sound Exhaust

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tractorboy567
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How to get Hemi Sound Exhaust Empty
PostSubject: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeSat Mar 02, 2013 9:11 pm

ok, the general lee tractor that i am building has a 19hp Briggs I/C opposed twin on it, and to make it sound like what it will look like, i need a sutup for an exhaust to make it sound ALMOST like a hemi. any suggestions?
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dylansrockinrigs
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeSun Mar 03, 2013 10:37 pm

Straight pipes! as long as they are at least 18 inches long and have a good bend or two in them it wont hurt your motor... You should run them out the back under the fenders run a seperate one for each cylinder and for the last 8 inches put big 2 1/2 or 3 inch pipes but from the motor to the end use lik 3/4 inch or 5/8 inch pipe... hope this helps... Nice motor wont be hard to make that beast sound beastly
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truckin42
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 9:27 am

@dylansrockinrigs wrote:
Straight pipes! as long as they are at least 18 inches long and have a good bend or two in them it wont hurt your motor... You should run them out the back under the fenders run a seperate one for each cylinder and for the last 8 inches put big 2 1/2 or 3 inch pipes but from the motor to the end use lik 3/4 inch or 5/8 inch pipe... hope this helps... Nice motor wont be hard to make that beast sound beastly
Yeah i would give this a try.
You should get somw chrome tips to.
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dylansrockinrigs
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 5:05 pm

Crome would look great... Especially with a fake scoop coming out of the hood
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tractorboy567
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 6:10 pm

yeah it would, i think i can do that
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dylansrockinrigs
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 6:36 pm

I did pretty much the same thing when i was 10-11 was a loud tractor
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Thunderdivine
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 6:57 pm

Maybe best to make a resonance box, but this time you want it to echo, like multi cylinders.
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truckin42
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 8:25 pm

@Thunderdivine wrote:
Maybe best to make a resonance box, but this time you want it to echo, like multi cylinders.
Yeah you could give this a try.
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Chopperhed
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 8:54 pm

Its been my experience that twins can only really sound like a twin. but a big resonant empty chamber might help.

A good audio tech could probably design a box that would bounce the sound wave around the can, with out too much volume loss.

Or you could design a system of flappers that shuttle individual exhaust pulses to separate pipes, and run 4 pipes out each side.

Actually, to think about it. A simple 4 vaned rotor in the exhaust flow would probably interrupt it enough to simulate 8 cylinder sound waves. It would take 1 in easch pipe with a crossover tube.

BTW, on the subject of eexhaust, a crossover tube is used to increase lower end torque on dual exhaust systems.
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tractorboy567
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 9:04 pm

i like all your ideas, im still figuring out how to do this cheap, and i might have some old pipes from a old rat rod down in my scrap pile, would those work?
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dylansrockinrigs
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 9:06 pm

When i straight piped mine i used pipe from lowes and it was really sheap... you could use old spray paint cans for tips
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tractorboy567
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 9:15 pm

thats a really cool idea, and i dont have to spend a dime because i have all that stuff in my scrap pile
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dylansrockinrigs
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 9:17 pm

there ya go
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tractorboy567
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 9:20 pm

ok, but what will it sound like, will it sound like a loud twin, or a car engine? Question
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dylansrockinrigs
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 9:22 pm

My first straight pipe on a 3.5 horse sounded like a little dirtbike... I got it to sound almost like a harley when I was done
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truckin42
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 9:26 pm

Yeah mine sounds like a harely.
All i did was pull of the muffler.
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dylansrockinrigs
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 9:29 pm

Mine was two feet of 3/4 inch piping and a small can with holes drilled in the sides inside of a large can with a flapper on top
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tractorboy567
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 9:31 pm

ok... good ideas, im going to run them down to under the running boards, and curve them to have the tips pointed out, maybe put some expanded mesh metal on the end for support and looks, then use high heat spray paint to give it some color, or i could do that can idea, i dont know, whatever sounds cooler
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truckin42
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 9:32 pm

Oh ok so you made a homemade can muffler.
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truckin42
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 9:33 pm

I would try the can idea.
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tractorboy567
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeMon Mar 04, 2013 9:38 pm

i can build both, because theyre simple, and pick one
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Marines2621
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeTue Mar 05, 2013 9:22 am

i got straight pipes on my 16hp opposed sounds real good. i would stay with a straigh pipe.
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tractorboy567
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeTue Mar 05, 2013 10:01 am

ok... ill use the straight pipe, hopefully it sounds cool!
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truckin42
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeTue Mar 05, 2013 10:59 am

Ya it should goods.
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Thunderdivine
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How to get Hemi Sound Exhaust Empty
PostSubject: Re: How to get Hemi Sound Exhaust   How to get Hemi Sound Exhaust Icon_minitimeTue Mar 05, 2013 11:32 am

I know how to tune 2 stroke, they're exhaust is like a non mowing supercharger. But not so familiar with tuning on 4 strokes.

Well imagine the engine is a speaker, then to make it sound massive it should help with a box with crossover pipes with no filling off course. Straight pipes are plain noisy and not very healthy for the engine I guess. Not in the long run, if you think about it, the flames it shoots out would be best kept in the cylinder to kick the piston down, and not to leave the cylinder Smile
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How to get Hemi Sound Exhaust Empty
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