I Made a High-Flow Silencer for my Intake.

SABAT! andDestroy /

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May 28, 2008 01:26AM

so i made a intake silencer for my tomos, because since i ditched the old air-box for the carb upgrade kit, it has been very noisy, and i feel im more likly to be pulled over, seeing how my streetmate is basically styled like a motorcycle, and fast for 50cc..

i started with these.

then i made a large tube out of this very pliable wire mesh since i wanted it to perform well

then i stuffed the pvc chamber with not alot, but plenty of fiber glass insulation.

then glued the whole bit together

decent size tube for air-flow..

the airfilter fit perfect and snug... and the rubber grommit i bought at the hardware store. i just brought a micrometer in with me...

pretty cheap. everything can be found at a hardware store, and im really happy with the results, it sounds like i have the stock air-box, and you can hear the technigas hum better.

im planning to paint it back as long as the glue holds up seeing how i didnt use a inner sleeve. and ill zip tie it on so it wont wiggle, now im waiting for jets because its deffinettly still running lean... i just realized you can tune it like a bing this morning, the needle has 5 different depths into the infuzer. anyone else having a hard time with PBVA dellorto carbs?

Re: I Made a High-Flow Silencer for my Intake.

SABAT! andDestroy /

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sabat OP

May 28, 2008 01:27AM

Fuck im sorry some of them are so huge , im new to posting pictures since today....

Re: I Made a High-Flow Silencer for my Intake.

Brennan O. /

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brennano

May 28, 2008 01:36AM

You are going to be cleaning the carb a LOT with that insulation up in your box. So get used to that shit.

Re: I Made a High-Flow Silencer for my Intake.

Graham Motzing /

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grahammotzing

May 28, 2008 01:42AM

might want finer mesh, but good idea.

a fill other than fiberglass might be more resilient to getting sucked in. i know when you buy the pipe filling stuff from the motorcycle store it lasts longer than regular fiberglass insulation in your pipes.

Re: I Made a High-Flow Silencer for my Intake.

mike /

mikeruck

May 28, 2008 02:35AM

Performance and silencer do not go in the same sentence :)

Re: I Made a High-Flow Silencer for my Intake.

Bitter /

bitter

May 28, 2008 09:31AM

stuff with cotton balls, wont hurt engine.

Re: I Made a High-Flow Silencer for my Intake.

SABAT! andDestroy /

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sabat OP

May 28, 2008 02:13PM

will fiber glass really hurt the engine? i mean it soesent really burn,but i xan imagine it doing much.

Re: I Made a High-Flow Silencer for my Intake.

David Ciao /

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davidw

May 28, 2008 02:16PM

that seems like it is really going to fuck your air flow up and change it in a number of ways.

Re: I Made a High-Flow Silencer for my Intake.

SABAT! andDestroy /

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sabat OP

May 28, 2008 02:18PM

yeah it has been. but im tuning to it. for the record im not telling everryone to do this to theyre bikes.

Re: I Made a High-Flow Silencer for my Intake.

SABAT! andDestroy /

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sabat OP

May 28, 2008 02:20PM

every performace exhaust ive seen for peds have a performance silencer over a baffle set up.

Re: I Made a High-Flow Silencer for my Intake.

Flagrant - /

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stevew

May 28, 2008 02:22PM

Yes glass is very hard. Think glass bead blasting. Diamonds will cut glass though

Re: I Made a High-Flow Silencer for my Intake.

mike /

mikeruck

May 28, 2008 02:22PM

and every one takes them off :)

Re: I Made a High-Flow Silencer for my Intake.

SABAT! andDestroy /

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sabat OP

May 28, 2008 02:35PM

im waiting on my jets to come anyways. i mean this was cheap and it wook all about and hours plus a trip to ace hardware....

Re: I Made a High-Flow Silencer for my Intake.

tophat /

lastplace

May 28, 2008 02:54PM

Is that a street mate R ? If so, how is it and is it worth it?

Re: I Made a High-Flow Silencer for my Intake.

HOMOPED /

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harold

May 28, 2008 03:03PM

the best way to silence a two stroke is to eclose the air filter, not to put a speedbump in your air flow. what you could do that would take the same ammount of time and money would be to make a "box" out of sheet metal. just grind it into shape and hell u can even jbweld it. attach the box to your frame with mopre jbweld and stick your air filter inside that.

there is one buil in to the monza frames. the exact same engine on this frame compared to a magnum has completely different sound. half as loud at full throttle, 1/3 as loud at low rpms.

Re: I Made a High-Flow Silencer for my Intake.

Steve /

47steve

May 29, 2008 01:52AM

So, if the best way to control intake noise is to enclose the air filter, we're back to the airbox concept. What all can be done to improve the stock airbox? I cut off the "snorkle" tube (that thing that extends into the airbox from the carb connection and ends with a square 90-deg bend), then I enlarged the remaining passageway from the airbox to the carb. I did not make any additional opening upstream of the filter because I didn't want to let noise out of the airbox. The filter itself looks like it would not cause a big pressure drop -- it's not very thick, and seems plenty porous. Got any better ideas?

Re: I Made a High-Flow Silencer for my Intake.

maciek /

macelius

May 29, 2008 05:17AM

good thinking, or make a bigger air box so you can have more filter material, if there is enough area for the air to pass through it won't impede air flow at all.

Re: I Made a High-Flow Silencer for my Intake.

noah /

noah

Jun 20, 2008 11:13PM

i love the idea... i wish i could put it on my bike, but i don't think there's enough space...

definitely think that finer mesh would be better, or maybe thicker foam insulation? like that stuff they use in sound proofing walls?

also why would that "tube" of mesh really impede airflow that much? i don't think performance will drop

also, its easier for me to understand apprehension about putting material upstream of the engine (you mentioned in its defense the silencer in an exhaust, but that's downstream, so poses no danger of going into the engine, unless your expansion exhaust is somehow magically tuned to suck it back in all the way into the cylinder)

btw i'm running an a55 conversion on an older bike, and set everything up, waiting for a tecnigas, already filtered and jetted, how do you like yours? (noticed it from pics)

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