Hey guys Im in need of help with the exhaust. I live in Brooklyn and my current setup is gt35r, 550 primary and 1300 secondary. Power FC, water meth, universal presiliner muffler and a borla mid exhaust. Now the cops are busting my ***** that my exhaust is loud. im thinking about going with a racing beat exhaust because i heard alot of guys saying that its very quiet, and on Wot it sound lovely. My question is Im pushing 400 HP, if I install the racing beat exhaust, will it restrict my exhaust flow and will I loss HP. Thanks for your help guys.

 

I think that just by its very nature, all mufflers will inhibit exhaust flow somewhat.

The racing beat muffler I have on my car has approx the same flow resistence as the original mazda muffler.

 

So should I go ahead and get the racing beat exhaust. I need to do something quick. **** me off everytime a cop pulls me over, cuz its the same BS. Muffler. I just want to take my car out enjoy it and just cruise around town with out the boys in blue busting my *****.

 

Truthfully if you have no cat, no other exhaust will help you really because rotaries are loud by design.

Im assuming you're running no cat because you're single turbo.

Only thing you can do is maybe install a resonated midpipe and you wont even have to change your exhaust.

 

go with the rx7store resonator, i have that with the rb duel, and i love it.

 

Yea im single. I will check it out the resonator from rx7store. Thanks alot guys..

 

The RB dual is a freer flowing unit than stock, someone had some empirical data on this and other exhausts some while back.
But yeah, without some sort of a cat you are just going to be LOUD....lol!

 

That won't help if you have a wastegate that goes to atmosphere.

Didn't see in the thread that this is a single, but it sounds like it might.

I have a magna flow midpipe, with the RB dual, and have been told that it is still pretty loud under WOT, regardless of WG noise.

 

i believe this is your real problem. the sound could all be coming from your wastegate

 

well if it goes to the atmosphere, of course your going to make more noise, but if your cruising, you shouldn't have the cops on you since the wg doesnt open unless your at a certain boost lvl.

 

I have the RB dual tip catback and it is more free flowing than stock, and is also rather quiet unless you're at wot. I would either go with the Racing Beat or the PFS silencer. Both have a good sound and are not annoyingly loud, and both still increase airflow.

 

Well, I'm not sure about any of the other models; I've have a Racing Beat 304 dual tip cat-back/exhaust. It is NOT quiet but any stretch of the imagination. Once she warms up and settles into a proper idle, she sounds like a damned Harley.

 

I made 400 hp easily on a customer's car with a 35R and racing beat catback. The tune was very conservative. True you might gain a few hp with a less restrictive and louder exhaust, but who really cares. This particular car sounds great with a magnaflow muffler in the center section and racing beat catback. Stop by my shop if you want to hear it.

 

I have a single tip racing beat cat back with a magna flow mid pipe and its pretty quiet.

My buddy has a straight 3" exhaust and PFS exhaust cat back. it sound awesome at high revs and high speeds but its loud and annoying at idle.

 

My waste gate is connect to my exhaust.

Rotary Experiment Seven what is your addy. Once I get home from my week duty from the Army I'll pass by with my FD so you could hear my exhaust and I could hear yours. Thanks

 

its on my website

 

why are people always saying that the RB is restrictive? Where did this come from anyway lol..


it's a 3 inch pipe... Loudness of a muffler is mainly a function of the canister design not it's flow.

 

I've seen cars pick up a few hp when swapping a racing beat catback for something a bit more open. I am in no way bashing the racing beat, as I hate loud rotaries. I am merely saying that a few hp loss is a pretty acceptable tradeoff to have a reasonable sounding exhaust.

 

No kidding. I'm no longer the loudest car at autocrosses.

At one event I had to modify how I drove a certain section to avoid setting off the alarm on the db meter. And that was with Magnaflow and RB dual.

Gotta get that WG plumbed into the exhaust eventually.

 

Its coming from people who have actual experience w/ it. I have a pettit 3" downpipe to a rx7 store resonated midpipe and a old school big single tip pettit racing catback. I made 372 whp on that @16.5 psi. Swapped out the catback to a rb dual and w/ the same boost control setting made 357 whp. The rb dual was choking it to 15.2 psi. I can notceably feel the power difference.The dual is more quiet and sounds good. I think it is fine for a street exhaust.

 

I have a single tip RB exhaust. Got it on the advice of Ihor or Rich, I forget who. It flows much better than stock and its a little bit louder than stock but Im sure its more restrictive than the higher end stuff out there. I notice that it stays relatively quiet even when stepping on it to. I think its a freaking awesome alternative if you are looking for something quiet. When I first had it installed, I redlined it a bit to get rid of some carbon and that needle just moved so much faster than with the stock exhaust. Its also damn cheap on the forums. You probably will lose some power but who cares. Its a good sacrifice.

Here is the IRP site.
http://irperformance.com

 

I rather lose some HP than lose money from my bank account. LOL Im going to get the racing beat exhaust. once I pay some bills this weekend..

 

THANK YOU! I have been asking for years and no one ever gave a real number or a reason... It seems that most were just regurgitating what others have said.

Since you guys have ACTUAL real world experience with the RB vs other I take back what I said.

 

But next time you say something you are just going to regurgitate what they have said. Will that invalidate what you say if you pass that information on to someone else?

 

not particularly that's what links are for


Most people just post with no facts or reasoning behind their ideas. That's how stuff gets miscontrued (er 3 mod rule rings a bell).