As we all know the RB RevII system is a Y piped 2 muffler system.
I am wondering if anyone has adapted it to run a Down pipe(turbo) to the 3" Presilencer and then a pipe to ONE muffler.
basically a single muffler setup.
anyone?.Thanks guys,STYX!~

 

seems like a waste of money to buy the whole system to not use it. best bet would be buy just the peices you need then make a pipe to replace the y-pipe

 

I have had the system for about 3 years so no waste of money here.
I bought Used too.
it is just to take some weight off,as the whole exhaust is about 75 pounds..woops,forgot the down pipe...say 80 or so.

 

72 lbs just got mine from RB not too long ago. but hell if its no loss to you, try it. but when it splits to the mufflers it downsizes, but there's 2, so idk how much it will like just one smaller pipe. probably wouldnt be a huge deal

 

72..well my memory is still wurkin..thanks Barkz!
are you in the sandpile?

 

lol no problem, but thats light compared to just the stock mufflers lol those things were heavy as hell! and no im back home, keep forgetting to change that lol

 

Err... Wont the lost performance offset any weight savings...?

 

After the Y it's only 2.5 inch, no? So that would be restrictive then...

Riz.

 

It's worse. The muffler piping is 2" OD, so ~1.75" ID. That's the same size tubing they use for the NA header primaries.

 

.I think I may be selling my set up then..
I got a T4 turbo going on the car and it's down pipe doesn't match anything,so That may be telling me it's time for a change......like spring,and no more long underwear!..haha!

 

Go for anything between 3" to 4" front to back.

Riz.

 

The muffler inlets are only 2.375" on the turbo system. I was looking into using one as an option for a quiet single n/a.

 

you can keep the system and just have a small section fabricated to go from the downpipe to the pre silencer or "cat back", really not a big deal

the bad thing about custom systems is trying to get the noise just right, it could turn out obnoxious.

 

Why are you guys doing single pipe anyway, especially on a turbo car. And besides, it looks silly to have 1 pipe and 2 exhaust cutouts...I don't care how big it is. Reminds me of the non-RT, 6 cylinder Dodge Chargers...with the "I couldn't afford the more powerful one, with the 2 pipes" look.

I don't get it...

 

read post #3.

 

@WMS: Why would you care more about looks then weight on a sports car? I ask you back.

Riz.

 

You mean, that's it?...just to save a few lbs...? I thought you guys were going to tell me about some "super scavaging" effect by keeping it all in one pipe, or one muffler being less restrictive than two(it isn't). Well, at least now I can stop wondering.

Anyway, at least the weight is in the rear....

 

Nope, when it comes to exhaust I care about this: flow (design/diameter) and weight.

Riz.

 

If this is going to be for a turbo as indicated, scrap the RB and buy or custom a 3 inch turbo back system. Just my 2 cents. If the RB is as restrictive as mentioned, it would make no sense to keep it for your purposes.

 

It's all about weight saving? Just get a skinnier GF.

 

I got rid of the old ball and chain so I can spend "quality time" with my car!
So,my GF weighs Zero,..car weighs 72 pounds more with the RB system on it..haha!.
BUT If I could get a 72 pound GF and get rid of the RB system I would call it Even..(hmmm??!)

 

Sports Cars are also 'spose to "look" sporty, and dual exhaust outlets "look" sporty...

Don't get me wrong...I ain't hattin on you guys, I just thought I was missin' out out on some of that progress that went on while I was away from Mazda for 10 years.

 

the RB system is 75lbs, so its heavy, but A its lighter than stock and B its really low in the car.

C if the average T2 is 2800lbs, then going from 72lbs to say 50lbs on the exhaust is like 1%, and when the weight is low down in the rear, then you could make the argument that you actually WANT some weight low in the rear.

so in a street car, who cares.

in a race car you do want a lighter car, but you also want to keep the weight distribution good as well.

as an example we ran Spec E30 one season, which is an E30 BMW series, and when you make it a race car they get really front heavy, because the engine is iron, and gigantic. to get our car to legal race weight, we had to add 200lbs of ballast, which went under the spare tire.

you would think that going from 140hp/2600lbs to 140hp/2800lbs would result in slower laptimes, but you'd be wrong. balancing the car actually helped thru the corners, so laptimes were actually the same or faster.

 

I'm with 'ya on that one, Bro. That's why I was surprised with that answer of "less weight" on a street car.

We, too, had to add weight on my RX2 we ran in the IMSA-RS series even after we were mandated to add a muffler to our "normally megaphoned" exhaust in '82. It was about 10lbs. Other car didn't have to have a muffler, but rotary engined cars did. We were more concerned about them reducing our performance again, but we thanked them in the long run.

 

I'm getting sick of people saying weight in street cars is unimportant. There are no downsides to overal lower weight of the car, as long as it is balanced. It helps accelerating, turning, braking. Reduces wear on tires and other suspension parts, reduces wear on brakes and reduces wear on the entire engine/drivetrain. It also gets you better milage. If all you care about is a fun sporty car: It makes the car feel more alive. So yeah, it's pretty important.

Riz.