bike muffler vs car glasspack

R3-SuperX-Rider

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Jun 20, 2011
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I was wondering if someone could answer a question, a bike muffler is similar to a glasspack for a car, so could you run one on a bike?
I have a red R3 and was thinking of putting triple Cherry Bombson it. I already have the TORs exhaust with cat bypass and the mufflers are starting to rust through.
Any help would be appreciated.
 
You can use anything you want, it's just that when you do something new that hasn't been tried before YOU become the guinea pig and trial and error can cost more than you try to save.
 
HellFire said:
You can use anything you want, it's just that when you do something new that hasn't been tried before YOU become the guinea pig and trial and error can cost more than you try to save.
Click to expand...
,,,,and sound like a weed eater,,,,,
 
Unless you want to fettle and fiddle the A/F mix stick with a known exhaust system.

Understand I'm not telling you to NOT do it, but your bike may run like a wheezing Briggs & Stratton on life support when you're done.

If you want to know why, just ask.
 
Glaspaks sound great on bikes....at least on the Valkyrie.

My 1999 Valkyrie has custom made pipes that use the stock headers (6 cylinder for those that might not know) and cherry bomb glaspaks. These fit under the stock 4" covers so no one knows they are not stock pipes by their outward looks. The maker, MarkT, came up with a trombone setup that inserts a straight pipe (that can be cut to any length) that slides into the inside of the glaspaks. The length of the trombone determines how much of the glaspak is bypassed. These have tabs that allow you to remove these in seconds without using tools (make sure the pipes have cooled first!!). The result is either a full glaspak sound up to a full straight pipe sound set by the user.

I've had these on my Valkyrie for 10 years and the sound is incredible. I prefer the full glaspak sound, but in a few seconds I can drown out almost any Harley in the parking lot. If you're interested, here's the link to his site....

Exhaust System

As a side note, these glaspaks did not require any changes to the fuel/air mixtures and run perfect on the stock 6 carburetor setups.
 

On a carb setup it will run fine since the A/F is not delivered by a fuel map but constant velocity vacuum. The throttles on your Valk open butterfly's that increase the vacuum in the diaphram chamber lifting the throttle slides, pulling the throttle needle out of the main jet. Works great, just balance the carbs and ride.

Entirely different on the Rocket where fuel delivery is based on a throttle position sensor, a fuel and ignition map housed in a computer.

Your Valk can withstand a large change in exhaust flow with little problem because it uses the exhaust pressure to deliver fuel to the combustion chamber (advantage carburetor). A carb is less precise than electronic fuel injection for combustion (advantage fuel injection). Never assume the two are equal.
 
Believe it or not, I understood that.
I do know a harley drag pipe will work welded onto the stock header
cause I've got one of those I put on sometimes.
I do have to adjust the Dobeck by one button push when changing them,
and do the 12 minute tune.
So I don't see why it wouldn't work with a cherry bomb..
Heck, give it a whirl and let us know.

Oh, and BTW, WELCOME TO THE SITE.
If you'll post a short (or long) introduction in the "Meet the Members" section,
I'm sure a lot of the guys would like to meet you and hear about what brought you into our little corner of the world.

again, glad to have you with us
and modify away, I can't wait to see it...
 
Welcome!!!! Hell yeah give it a try!......cant hurt nothing....(well kind of!).....if you buy the obdii cable and download tuneECU for free......learn a little bit about the program......you could get pretty close to running smooth with the glass packs.......search this site for "TuneEcu" and alot of threads will pop up with info.....good luck!!! enjoy the site

mutt
 
Watch which glass-packs you use. Many use louvered tubes inside. The louvers act to make the internal diameter much smaller, and if faced the wrong way, make an even bigger restriction to flow.

FWIW, Lonzol has run glass-packs on his R3's for a few years, and with the stock header, his wife's R3 actually made better power on my dyno than TORS.
Nice people too.
 
i like the car glasspacs had one on my america sounded great.

will be doing the same thing with my R3T.

stv
 
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