'84-12A-GSL

How bout the best of both worlds?

True duel with a single side exit!...Anyone ever done this on an FC?

Black91n/a

True dual = 2 exits. Apparently the long tube to the rear axle exhausts have lost favour with most tuners.

'84-12A-GSL

My exhaust does have two exits.





Duel ALL the way back. See?

NZConvertible

Well how can there be any ounces that don't count? That's why that statement is so silly, just like saying "it all adds up". How could it not?

Yeah, the inside of an Elise looks just the same as the inside of a stripped FC...

Oops, when you said you had an RB system I assumed turbo. My bad.

The whole point of the FC's stock exhaust configuration is being able to use two parallel mufflers for better noise suppression. Running two pipes to one muffler would be a waste of that opportunity.

This thread is about dual rear mufflers, not dual tips. It's also about FC's...

RotaMan99

Best of what worlds? Performance and sound? True dual is not always the best option for performance. You loose the scavenging effect which can help n/a engines remove the exhaust from the opposing chamber that is entering the exhausting cycle.

True dual is non-existant on turbo'd engines.

Now 2 single runners merged somewhere under the car would be a good option. Those merged headers do have a reason behind them. I forget if moving the merge point back increases low end or high end. I remember reading something about it a while back.

How much you want to bet the internal design of that pacesetter muffler has to seporate perforated tubes It may be a single muffler but it may do the job as two.

NZConvertible

Not if you have two turbos...

It won't do the same job as two mufflers of the same external dimensions, which is the whole point of the FC's dual exhaust. The physical size of the can effects a muffler's performance. Ask anyone with those silly N1-style mufflers...

RotaMan99

lol, your right.

good point.

'84-12A-GSL

Well my post was more less a joke, when I said "the best of both worlds" I was joking around cause people were arguing that duel is better and other were saying single is better, so I posted my exhaust, cause it is a duel exhaust system, but exits on one side.

And the Pace Setter actually has one large perforated tube, than joins back into two separate exits. So there is a cross over point. Probably doesn't have the same affects of an "X" or "H" pipe, but I would imagine increases the scavenging affect.

NZConvertible

I see two pipes in, two pipes out...

'84-12A-GSL

Well if you shown a flash light into the muffler you would see that that two pipes enter a large expansion chamber and that exits into two resonated tips.

NZConvertible

Ah, so it's a chambered muffler, not a straight-though one. That's not quite what you said before ("one large perforated tube").

'84-12A-GSL

No it is straight through, it isnt a chambered muffler.

I just called it an expansion chamber, doesn't mean its a chambered muffler.

Ever see a pipe on a 2-stroke bike, how it goes from small to big than back to small, thats called an expansion chamber.

My exhaust goes from two small ones, into one large one, than back onto two small ones, the gases expand when they reach the large one, because they travel from a small space to a large one.

NZConvertible

If it has an expansion chamber, it's a chambered muffler and it's not straight-through. The names are strong clues.

Your posts also have nothing to do with this thread...

'84-12A-GSL

Dude, it's just a name, Ill take a pic of the inside of the muffler if you want.

There's no baffles, you can look right through it

And I'm strictly answering to your comments, there for your posts responding to my original post have nothing to do with this thread.

Ravingecu21

I have decided what am doing to do with my exhaust Am going Single

K!NCH

iTrader: (2)

Are you gonna use any major brands like Apexi, HKS, Corksoprt... cause I wanna go single on my 88' GTU. Im thinkin RS*R GTII cat-back and racing beat headers and presilencer.

Ravingecu21

i already have a apexi N1 dual just goingto eliminate one of them

Aaron Cake

iTrader: (1)

So you're going to cut the flow in half?

Ravingecu21

no i have a friend that welds he is going to modify it

Roen

iTrader: (2)

i think that's the same thing if u just cut up the y-pipe and weld it ****.

NZConvertible

The two pipes after the Y will be smaller than the one before it, so simply blanking one pipe off will reduce flow considerably.

Ravingecu21

i know that thats why am modifying it

NZConvertible

Modifying it how exactly?

yozsi

Yea, this NZ guy^ has no clue what he is talking about. In autocross one millisecond could mean 1st place or 1st loser. Taking 30 pounds out of the rear of your car is amazing, autocrossers dont remove the spare, jack, tools, kleenex box for nothing..... obviously you have never done any sort of sanctioned racing.

demontwig

Okay, I don't auto-x (yet), but a millisecond? Is the timing equipment even that accurate? Or is this another exaggeration?
Modified how is a good question, since I'd imagine that you'd just hack off the muffler and weld it to some larger piping since you're making it dual? Did I read that right? Doesn't seem too effective to me.