SheckeeShabazz

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

BigTone

looks, and it is quiet.

Icemark

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

krazykoncepts

definetly looks mean, and damn my single is soooo loud

less weight

NZConvertible

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

SheckeeShabazz

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

SheckeeShabazz

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

NZConvertible

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.

dorifc3s

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?

Yosumi

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

zer0_to_6ixty

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

2ndGen.rocket

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.

dorifc3s

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

ilike2eatricers

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.

Yosumi

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?

Rookie84

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

1987RX7guy

iTrader: (3)

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.

ilike2eatricers

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.

Yosumi

thanks for the help

n4ji

iTrader: (1)

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

nothinguntil

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

PureSephiroth

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

Warehouse

*drool*

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

krazykoncepts

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

1987RX7guy

iTrader: (3)

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