What is with having dual exhaust on an rx7? Since it is so worthless, why do so many people do it?

 

looks, and it is quiet.

 

yep, it looks cool and is much much quieter than a single

 

definetly looks mean, and damn my single is soooo loud

less weight

 

You should learn a bit more about fluid dymanics before you make such dismissive (and totally incorrect) comments.

 

krazykoncepts, did you say it weighs less?????

 

NZConvertible, that is why i asked about it, because your right, i dont know fluid dynamics, i would just like to know a little about why they put them on it, seeing as how it isnt a v engine

 

Fair enough. From Mazda's point of view parallel mufflers meant considerably less noise for the same flow (or the same noise for more flow). For us it makes it easier to have a cop-friendly high-flow exhaust. If the pipe sizes are properly selected there can be less less restriction than a single (which sadly doesn't seem to apply to most off-the-shelf dual systems). The weight difference is a tiny fraction of the car's overall weight. And it looks great.

Do a search and you'll find countless threads discussing this at great length.

 

I dont care Im gonna convert into single.

i was gonna go cheap and take off the right muffler and weld the open Y pipe where the right muffler used to be and leave the left one...

good idea or bad idea?

 

Speaking of dual exhausts, does anyone have Racing Beats Turbo cat back system? does it make good on its 60 hp claim?

 

sounds like a bad idea to me, but I've never done that. I prefer my dual exhuast

 

terrible idea. If you mean you are just going to weld one side of the Y-pipe closed, all you are going to do is make a huge restriction in the exhaust. Gases are going to flow down the right side of the Y-pipe, get stuck, and then have to go around to the other side.

 

^ahh ic but what about taking out the y pipe then get a custom pipe that bends to the left only?

 

You are talking about the 3" turboback exhaust. This is different from the catback.

http://racingbeat.com/FRmazda2.htm

Read the description. The 59 hp increase is not due just to the exhaust system but also because the stock boost levels are increased as a side effect.

 

I stand corrected. However you get the 60 hp just from the exhaust? thats pretty sweet

wouldnt the boostincrease need you need a new ECU? or do only FDs need a ECU after an increase?

 

I plan to go single coz I hate the look of duals... Well, not really hate but I prefer single

 

They state clearly on their website that you need a Fuel Cut defender so that you do not hit fuel cut since the boost rises past the limit the ECU is supposed to see.

 

Yea you need a fuel cut defender or you will hit a wall when you go over 8lbs. You might also consider upgrading your fuel pump at the same time.

 

thanks for the help

 

There were holes for exhaust pipes cut on both sides of the bumper for a reason

 

you should check out the ture dual exhaust set up on mazda trix!!! now that is damn cool!!!

 

its also the loudest thing on the face of the planet. Especially on NA's.

 

*drool*

Can't wait. Just need a dang FC. AAARRRGGGHHH!!!

 

ya less weight....but i meant on my single

 

If your talking about true duals your WRONG. search for the sound clips we have several to boot. Not loud by any means.