true dual vs. Y
Thread Starter
Teching In
iTrader: (1)
Joined: May 2004
Posts: 39
Likes: 0
From: Currently Iraq, normally Denver!
true dual vs. Y i going with LT's but im still wondering whats gonna be the power difference. i know true duals is better. but is it alot better? eventually the car will be cam'd thanks
TECH Addict
Joined: Jun 2005
Posts: 2,660
Likes: 14
From: England
Originally Posted by kissell_13
i going with LT's but im still wondering whats gonna be the power difference. i know true duals is better. but is it alot better? eventually the car will be cam'd thanks
And besides the difference is only going to be a few BHP so does it really matter.
TECH Enthusiast
Joined: May 2005
Posts: 555
Likes: 0
From: Blairsville, GA
Where duals will come in handy is when you toss that cam in it. Conventional catbacks do a good job on stock/mild engines. Cammed. H/C, FI, and N2O engines will benefit more from duals because of their cavernous flow capacity, numbers of which mildly built engines can't make, thus negating their need for duals.
If you can, go with a catback for now. When you cam it, see how it does. Then, put on some duals and check it. You can always sell the catback and recover some of your money. Plus, duals sound a HELLUVA lot better'n a catback.
If you can, go with a catback for now. When you cam it, see how it does. Then, put on some duals and check it. You can always sell the catback and recover some of your money. Plus, duals sound a HELLUVA lot better'n a catback.
Welcome to an extremely divided issue.
Here's my $.02:
Previous exhaust: Kooks LTs, catted-y, Hooker Cat-back.
Dyno: 331/347
Current exhaust: Kooks LTs, custom ORX (read - no cats), 3" duals into the x-pipe, 2.5" over the axle, through Magnaflow bullets, into CME tips in the rear.
Dyno: 340/356
No cam here. How much of that was getting rid of the high flow cats? How much was the duals? Who the hell knows...
I did my duals right the first time (IMO)...I didn't do them dumped, so I have no complaints about interior noise at all.
Just do whatever floats your boat, and whatever is within your budget.
Here's my $.02:
Previous exhaust: Kooks LTs, catted-y, Hooker Cat-back.
Dyno: 331/347
Current exhaust: Kooks LTs, custom ORX (read - no cats), 3" duals into the x-pipe, 2.5" over the axle, through Magnaflow bullets, into CME tips in the rear.
Dyno: 340/356
No cam here. How much of that was getting rid of the high flow cats? How much was the duals? Who the hell knows...
I did my duals right the first time (IMO)...I didn't do them dumped, so I have no complaints about interior noise at all.
Just do whatever floats your boat, and whatever is within your budget.
Trending Topics
I say that true duals will flow the best, but you can see in my sig what I have. I believe you can get a pretty good flowing y-pipe (QTP or mufflex come to mind) and put a cutout in to be within a nat's *** of true duals.
FWIW, I chose my setup because I want my car to appear totally stock from the outside
I am considering going with the QTP dual cutout y-pipe sometime in the future, that might be the best of both worlds.
FWIW, I chose my setup because I want my car to appear totally stock from the outside
I am considering going with the QTP dual cutout y-pipe sometime in the future, that might be the best of both worlds. LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Originally Posted by Drew778
I'm also going back to a Y-pipe and catback from duals, got tired of the noise 
I'm in the process of going back to a Y/catback setup as well. The days of the duals were fun, and loud ... but I'm getting tired of setting off car alarms every other time i start my car, and not being able to talk on my phone in the car.Duals will show alil more power than a Y setup, but the duals really help pick up power throughout the powerband .... so your peak #'s wont be much higher w/ duals over a Y.
Thread Starter
Teching In
iTrader: (1)
Joined: May 2004
Posts: 39
Likes: 0
From: Currently Iraq, normally Denver!
thanks guys. i guess i'm still up in the air, i want a muscle car sound put i don't wanna be screaming down the road.. i like the way the slp dual/dual sounds with LT's, but i kinda wanna go with true duals cuz i want to mod the car later just not sure how much.
You guys that are going from duals back to a Y pipe - why not just change the mufflers? I went from swett thunders to Flowtech Raptors, I felt no loss in power. The car is actually quiet now. I can sit at 3k rpm at 70mph and talk normally to my passenger
A 3" Y pipe w 4" to 3" Flowmaster Merge collector into a 3" cutout is gonna make damn near the same as a dumped 3" ORX TDs setup. Both very free flowing setups for our size 346 engines.
I'm cammed but I picked up 6rwhp and 2rwtq going from ory with cutout in low 70 degree weather to true duals out the back in upper 80s and very humid weather. In equal weather conditions I would guess I picked up about 10rwhp and 5rwtq and the duals sound much better than the open cutout.