Josh

iTrader: (9)

Just curious if anyone has ever gained power switching from true duals to a Y-Pipe setup with a cutout.

Josh

Beast96Z

iTrader: (21)

I highly doubt it. The X-pipes are much more efficent than a y-pipe and in most cases, the bullets flow just as much as no muffler.

2MuchRiceMakesMeSick

No way. Even if someone did it would be peak power and not under the curve where it counts.

Beast96Z

iTrader: (21)

To clarify, he's saying you would loose mid-range power more than you would peak power by going back to Y. The X-duals really shine in the midrange.

silverbeast

iTrader: (16)

i couldnt agree more, after i took my duals off and went back with my borla i could tell a big diffference the first time i smacked it. i was like damnit!! thats why im going back to the duals. :-)

SStolen

iTrader: (22)

It would be nice to have a dyno overlay of a car who went from one to the other to see the way the power curve is affected. I have dual cutouts and will have my car dynoed again soon. I am going to do this on motor to see how the curve looks through my borla sportsman and basically open headers. I expect to see a noticeable and then nominal drop in torque until about 4500 rpm and then a good gain in the upper rpms where it counts.

Black02SS

iTrader: (36)

Here is a graph on my car. I went from a SLP Dual/Dual and stock TB to 3" True Duals with bullets and a Shanner TB.

matts22

iTrader: (2)

Wow, glad I'm going with duals in the future.

SouthFL.02.SS

I've gone back to a Y-pipe. Hope to have numbers soon. Car's been down for repairs (it's been a while).

Turo

iTrader: (23)

Mind if I ask what made you change? I was considering going back due to ground clearance, but I think I am going to keep the duals after all.

John98LS1

iTrader: (6)

I went back to a Y-pipe and borla setup.

SouthFL.02.SS

Ground clearance + Loudness.
I've gone to a QTP Dual Elect. Y + SLP 2OTL Catback. Loud when I want loud, quiet when I want quiet. Flows well both opened and closed. I even think it sounds better than the 3" True Duals X dumped I used to run.

Damian

iTrader: (89)

Most people i know have left duals and went back to a Y because they got sick of the noise.

FWIW, i've seen cars dyno before/after dual installs and the power didnt change at all

jrp

iTrader: (16)

peak or curve?

Damian

iTrader: (89)

Dont remember, it's been a while. Duals may pick up a tad bit in the midrange on most cars, but it's not "that" great over the Y setup like some people think. The Y is pretty efficient as long as it's a 3 inch with a good collector.

SouthFL.02.SS

Yes, a good merge is key.

P Mack

iTrader: (6)

Keep in mind 2 2.5" pipes have about the same area as 1 3.5" pipe. I've never seen a dyno comparison though.

SLowETz

iTrader: (12)

3" TD's here. Can't see picking up a nickel goin from TD's to a Y. The gains w/a TD/x system vs. a good Y setup may be only marginal on a 346, but on big cube bottoms, TD's are the only way to go IMO..... not to mention the sound can't be beat.

As far as it being too loud....put real mufflers on it, or.... you could always drive a minivan....

GrannySShifting

iTrader: (10)

what woudl you guys consider a good y pipe merge?

JS

iTrader: (4)

I would do it but I'd love to see a 3IN Y to a 3in interm to a 3in race magnum and single turndown against a 2.5 X Dual to 2 Race Magnums or even a 3in version back to back.

I believe u would gain nothing over the single with Y but thats just an opinion...