Jesuscookies

iTrader: (1)

Currently I have an extremely loud straight thru design Catback. It has a canister style muffler, a 5 inch tip, and basically all the rice trimmings.

If I switch to a quieter Racing Beat catback model am I going to have any horsepower loss as a result?

I talked to the guys at Racing beat, and they said, I would not lose any power, because theirs is a straight thru, free flow design as well. Just muffled differently I guess?

Anyways, excuse my ignorance, if I am equating sound with max horsepower, but I am trying to figure out how this works. Thanks for the help.

Oh, and I have a midpipe, and a downpipe. No Cats.

Thanks Again

911GT2

You might loose like 5 hp, but it won't be noticeable. You loose more than that when your intake temps increase. As long as it's a 3" cat-back (which the RB is), they all flow close enough to the same that you won't notice it.

It's still gonna be loud with the mp, but the RB is one of the quietest exhausts you can get.

Mahjik

iTrader: (1)

There was a thread where someone swapped a GReddy Power Extreme and a Racing Beat Dual tip back and forth and noticed a difference on the butt dyno, however no real numbers.

Quiet doesn't always equal fast, however I think the Racing Beat dual tip makes a good compromise.

Jesuscookies

iTrader: (1)

That would be nice to see some emperical data. I don't know that any actually exists. Anybody who has had both types on want to chime in?

Herblenny

iTrader: (13)

All I could say is that RB catback makes a huge difference in sound.. I have N1 dual and buddy of mine have the RB.. and its night and day.. we have exact same set up except the catback.. man, are those n1's loud.. Its still louder than RB with both silencers on.. Get the RB..

alberto_mg

wasn't Jason going to dyno test a bunch of exhausts a while back?

even if you loose a couple of hp, you probably won't really feel it enough to compensate for more comfortable noise levels. 300hp vs. 305 - what is that a 1% difference? it might sound less powerful/faster, but on the *street* i don't think it will mean all that much.

rynberg

I seriously doubt there's that much of a flow difference. Even if you lose 5 hp, who cares? Is that tiny amount of power worth having to put up with the noise and questionable looks of your current exhaust?

FWIW, I know that Vosko and several other 400+ rwhp cars are running the RB exhaust, so it can't flow that bad.....

MakoDHardie

I've been following the RB peformance threads for a while. How about the tip difference.... I know the single tip is supposed to be a bit louder than the dual tip. Is there a better flow rating on either of them? Do two 3" tips flow better than one 4" tip, or the other way around? I'm full open exhaust and I'd like to get something a little stealthier and less flashy. I'm into the RB exhausts, but the differences between the two is what will make my decision for me.

rynberg

I'm guessing their is little difference between the two, MakoDhardie. They are both 3" to the muffler. At the muffler the dual-tip has a "straight-through" Y-branch to the tips. I'm guessing the single tip just continues the 3" straight through the muffler to the tip.

In the end, it's probably very little difference. Perhaps the dual-tip gives a little more low-end while the single tip gives a bit more top-end.

maxcooper

Sound level does not necessarily equate to peak power. 5.0 magazine did a big dyno test of a bunch of mufflers this year (May, I think) and while there was not much variation in power, there was a lot of deviation in sound level. I didn't do any correlation analysis, but there were certainly some instances of a quieter muffler making more power than a louder one.

That said, I love the Racing Beat exhaust, but I am sure that some others make more power. I don't think it is a big difference, though, and whatever the case most of the cat-backs available are unacceptably loud with the rest of the system opened up. The Racing Beat looks great and has reasonable sound levels, which made it a great choice for my needs, even if it cost me a little HP.

-Max

matty

i switched from n1 dual to the rb dual. Man i love the RB! the sound is amzing even though i have an open exhaust. Nice and mellow but when the secondary comes on it is mean. The Rb also looks pretty close to stock. The big tipped canister style wasnt for me.

As far as emperical data goes....a local buddy of mine switched from the hks superdragger to the rb dual and dyno'ed. He found that he lost ~2.5rwhp with the rb. That can be attributed to weather or simply margin of error. bottom line is the the RB is a sweet exhaust!

BoostedRex

I have seen the same results as matty just posted. From a GReddy PE catback to the RB dual tip and only lost about 2rwhp. Also, as matty mentioned, that could've been intake temps causing that loss. I used to run the RB dual tip on my FD and absolutely LOVED the way that it sounded. IMHO, the RB dual tip and the M2 dual tip are the best two cat backs out there for the FD as far as combining looks, sound, and power. Laterz.

Zach

mr_tim

I heard these were pretty loud. I need something to replace my 4" cat back straight thru with, before my ears start bleeding.

matty

are u refering to the RB dual tip?
its quite common knowledge that this is posible the quietest exhaust on the mkt.

areXseven

iTrader: (1)

What's the cost of a RB dual tip, cause I only paid 110.00 for my MagnaFlow SS 3" Dual Tip and it really kicks major Gludius Maximus regarding sound and performance!! Looks pretty awesome too.

areXseven

iTrader: (1)

Here's a photo of the MagnaFlow:

areXseven

iTrader: (1)

Here's a photo of the MagnaFlow:

apneablue

I can't say enough about my RB duals...Of course I have nothing to compare it to other than my stock exhaust and a couple of friends 7...but I love it...Power wise it's great. I talked to Chris at RP and he said that he has squeesed 425rwhp though the dual tip before...so I think I like the noise level...Currently i am running DP, Resonated MP, and RB duals....When I added the RBD I noticed a slight increase in noise level but an nice increase in butt dyno power. After I added the resonated MP it was the same thing...Slight increase in noise level and a big increase in power...However, when the secondary turbo comes online it is LOUD...well, loud by my standards....I can still fire it up around the complex where my condo is and no one has complained yet...then agian I haven't stepped on it around there...So with all that said...I love it.

Herblenny

iTrader: (13)

Wow... I heard that Superdraggers are one of the worst catback.. I knew a guy in Cincy who dyno'ed with HKS and made really shitty HP... and when he switched to Greddy, he gained tons.. not sure how much.. but a lot.. Can't believe RB did worse than HKS... jus surprise by this..

matty

well what i said was backed by a dyno. would think that the superdragger flows like a **** though...

persuasio24

I've had the RB dualtips put on mine about a month after I got the car. So I've had em on for about a year now. I couldn't tell you if I had any performance decrease b/c when I put it on I also installed a downpipe, ECU, and intake, so my numbers were going to jump up form stock anyways. I will say though that it is an excellent choice for a daily driver (which is what I used mine for). I mean I've driven on loooong trips with it, and it is a very pleasant sound, not like my old magnaflow on my 93 accord : )..oooold school. Yeah so anyways its a great exhaust, and still sounds really sweet when you get on it.

areXseven

iTrader: (1)

When I replaced the HKS Super Dragger with the Mag-Flow it opened my exhaust flow tremendously and increased my boost from 10psi to 17 psi at WOT. Now I need a Boost Controller.

maxcooper

areXseven, your Magnaflow setup looks nice and sounds like a bargain, too. Would you say it is quiet like the RB or loud like the N1 Duals? I imagine it is somewhere in between, but if you could give us some more info that would be great. What tips did you use, and did you have a 3" pipe (SS? mendrel bends?) bent up for the rest of the cat-back? That looks like a good setup and could save some folks some money.

The Super Drager was baffled a long time ago, since the JDM cars did not havea pre-cat and they wanted to keep the sound level down (or at least that was the story). HKS redesigned the Super Drager 4-5 years ago to make it flow better. Without knowing which Super Drager model was tested, it is hard to evaluate the meaning of those dyno reports.

-Max

areXseven

iTrader: (1)

As far as Db levels go....at WOT, the Mag-Flow is much louder than the HKS it replaced but about the same Db levels at city street driving as the HKS. I've never heard an FD with an RB or N1 Dual set-up, so I can't compare. I'm the only FD in the Corpus area!!. The Mag-Flow provides a deeper, lower frequency sound compared to the HKS. Kinda sorta resembles the sound, at idle, you get from a V-8. (I did say "kinda sorta").

The stock number on the one I installed is..: 14298. It's a 3" inlet by Dual 3" outlet. The body is made of polished- mirror like SS. Straight through design. The tips were bought seperately and are MagnaFlow 3" inlet x 3.5" outlets. They were 12' long so they had to be cut to size and welded on the Muff. The muff shop just cut the HKS off in the back and used the same pipe to mount and weld the MagnaFlow onto it.

Donovan

There is also a difference in the old RB muffler and the one they sell now. I have one from about five years ago and it looks differant and is quieter than the one my buddy has on his car (about one year old)