Two Brother's Exhaust Sylencer Mod

[Parabellum]

Originally Posted by hokiekiteboarder

Sounds exactly like what I am looking for - hope to give it a go this weekend. Just have to get some high temp paint.

I love this mod, I think you will really dig it.

The other great thing about it, is that its not permanent and you can remove or install the mod in literally 60 seconds...so it would be really easy to pull out if you wanted to let the beast roar for a day at the track, or just a day in the twisties.

[exhaust]

Does anyone know a good website to order the db killers for the Two Brothers exhaust?. I would like to do this also and if you guys ever make a extra set I will buy some off of you. Thanks

[Parabellum]

Originally Posted by exhaust

Does anyone know a good website to order the db killers for the Two Brothers exhaust?. I would like to do this also and if you guys ever make a extra set I will buy some off of you. Thanks

Save your money, they don't do SHIT.

I tested my exhaust with the db "killers" in and out...and the difference was barely noticeable under 8K rpm. Above 8K, there was a *slight* reduction in noise, but that was it.

Putting the db killers on these pipes is literally like putting a band aid on a sucking chest wound.

For a whopping $7 worth of aluminum and about an hour of your time, you can make restrictors (as described in this thread) that will actually WORK and are tuneable.

[hokiekiteboarder]

Originally Posted by Parabellum

Save your money, they don't do SHIT.

I tested my exhaust with the db "killers" in and out...and the difference was barely noticeable under 8K rpm. Above 8K, there was a *slight* reduction in noise, but that was it.

Putting the db killers on these pipes is literally like putting a band aid on a sucking chest wound.

For a whopping $7 worth of aluminum and about an hour of your time, you can make restrictors (as described in this thread) that will actually WORK and are tuneable.

+1

I really wish I had saved the $60.00 it cost me - especially if this works the way Para says it does. I do like the way the PR-1 powertips look, but looks is all you're getting. If you really want them, I got mine along with my pazzo's from motomummy. I really like their service and shipping is always free no matter how much or how little you spend.

Two Brothers P1-R powertip*::*Two Brothers*::*Exhausts*::*MotoMummy Sportbike Accessories

[Parabellum]

Dude, thanks for putting me on to motomummy...free shipping is freaking amazing!

[hokiekiteboarder]

Originally Posted by Parabellum

Dude, thanks for putting me on to motomummy...free shipping is freaking amazing!

No problem!! They don't carry a ton of stuff for the FZ, but they do have some and they have always been very responsive and helpful through e-mail.

[hot4teach2]

You are wrong. Go back to school.

The ear doesn't hear it that way(sound intesity). The general rule of thumb is that the human ear percieves twice the volume at a 10db gain. This is not agreed upon by everyone though.

Originally Posted by Parabellum

You are wrong, go check on the dB scale for sound pressure levels and get back to me.

3dB = 100% increase/decrease in SPL.

I started my education in Acoustics and finished it in Digital Signal Processing, I know what I'm talking about here.

[Parabellum]

Originally Posted by hot4teach2

You are wrong. Go back to school.

The ear doesn't hear it that way(sound intesity). The general rule of thumb is that the human ear percieves twice the volume at a 10db gain. This is not agreed upon by everyone though.

Right, because its BULLSHIT and not rooted in MATH.

3dB is a 100% increase in power. Period.

Now, if you want to try and map power to perceived volume levels, you need to set up instruments for the EXACT scenario you want to measure.

Since we are talking about a dynamic scenario with doppler and a bunch of other factors in play, talking about the POWER of the signal is the only logical thing to do.

However, I know you are going to say that traditionally, in a LAB, 1 bel is perceived as twice as "loud". (1bel = 10dB).

[hot4teach2]

Right. It takes twice the power to produce a 3dB gain. In my 18 years as an MECP cetified car audio tech, this gain doesn't sound like twice the volume.

Originally Posted by Parabellum

Right, because its BULLSHIT and not rooted in MATH.

3dB is a 100% increase in power. Period.

Now, if you want to try and map power to perceived volume levels, you need to set up instruments for the EXACT scenario you want to measure.

Since we are talking about a dynamic scenario with doppler and a bunch of other factors in play, talking about the POWER of the signal is the only logical thing to do.

However, I know you are going to say that traditionally, in a LAB, 1 bel is perceived as twice as "loud". (1bel = 10dB).

[Eviloliv3]

but it does sound like you two are trying to see who can piss further into the wind... Let it go





I just put on the Two Bros pipes and WOW is it loud. A guy at a shop said that after you ride it for a little while, it will quiet down once the cans get some carbon from the exhaust in them. We will see. If not, ill be doing this mod

edit: lol, just found out this thread is 1 year old, lol

[rc5695]

Originally Posted by Eviloliv3

but it does sound like you two are trying to see who can piss further into the wind... Let it go

They did, but way to bring it back from the dead

Originally Posted by Eviloliv3

I just put on the Two Bros pipes and WOW is it loud. A guy at a shop said that after you ride it for a little while, it will quiet down once the cans get some carbon from the exhaust in them. We will see. If not, ill be doing this mod

They most definitly don't get quieter, but louder...

[s_n_a_f_u]

yup dont get quieter you just get used to it lol enjoy