will a 3" True Dual setup hurt?
Registered User
Joined: Nov 1998
Posts: 575
From: St Charles MO, USA
Re: will a 3" True Dual setup hurt?
http://www.mofbody.com/blkchevyz/web...6hpnumbers.htm
thats why i did duals.
i had dual cut outs in the y-pipe
thats why i did duals.
i had dual cut outs in the y-pipe
Registered User
Joined: Oct 2003
Posts: 2,140
From: DOVER DE
Re: will a 3" True Dual setup hurt?
Originally Posted by Hotwire
Is it crimp bend or mandrel bent piping? does he run full exhaust when making the passes?
Cutout installed where the Borla plates would be is open, no cutout in the Y pipe and the cat is removed.
I'm not saying he would benifit from a dual system. I' certian the engine would pick up power with duals and a set of LT headers. But the engine is is obviously not choked off by the single 3" exhaust.
Registered User
Joined: Dec 2003
Posts: 2,724
From: Oklahoma where trees are made of wood.
Re: will a 3" True Dual setup hurt?
Originally Posted by blkchevyz
http://www.mofbody.com/blkchevyz/web...6hpnumbers.htm
thats why i did duals.
i had dual cut outs in the y-pipe
thats why i did duals.
i had dual cut outs in the y-pipe
I'm not making anywhere near 450 RWHP.
Registered User
Joined: Nov 2000
Posts: 2,734
From: Kansas City suburb of
Re: will a 3" True Dual setup hurt?
I,m sure I saw most if not all of the gain due to the LTs BUT the 3 inch true duals did not hurt anything. I love the way they sound and much easier to deal with when working on the car than a catback system.
Registered User
Joined: Dec 2004
Posts: 655
Re: will a 3" True Dual setup hurt?
I went with a 2.5" xpipe setup just for a hair more ground clearance. between 3 / 2.5 I dont think a street motor would loose a noticeable ammount of power because of tubing diameter, because a street motor isnt even going to be able to outflow a 2.5 inch true dual system.
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Joined: Aug 2002
Posts: 465
From: Baytown Tx, Home of HRP
Re: will a 3" True Dual setup hurt?
Originally Posted by revtime
I,m sure I saw most if not all of the gain due to the LTs BUT the 3 inch true duals did not hurt anything. I love the way they sound and much easier to deal with when working on the car than a catback system.
Registered User
Joined: Dec 2005
Posts: 58
From: DURANT, OKLAHOMA
Re: will a 3" True Dual setup hurt?
2.5 is plenty i have 2.5 with an x and bullets x-pipe kit from mail oreder of your choice about 150 bullets 80 and you can use clamps till you get setup the way u want then weld great setup if you got LT
Registered User
Joined: May 2001
Posts: 1,511
From: fort worth/burleson Tx
Re: will a 3" True Dual setup hurt?
go 2.5 cheaper
better ground clearance
better size for your set up
gain power instead of lose lowend
duel 2.5 is good to 450hp i think...u don't need that
better ground clearance
better size for your set up
gain power instead of lose lowend
duel 2.5 is good to 450hp i think...u don't need that
Registered User
Joined: Nov 2001
Posts: 719
From: Summerfield, NC USA
Re: will a 3" True Dual setup hurt?
Originally Posted by Critter
go 2.5 cheaper
duel 2.5 is good to 450hp i think...u don't need that
duel 2.5 is good to 450hp i think...u don't need that
Registered User
Joined: Nov 2001
Posts: 719
From: Summerfield, NC USA
Re: will a 3" True Dual setup hurt?
thank you, will check it out. figured I'd get creative and ask a company, just sent a lengthy email to random technology about this very subject seeing which way they would steer me since I'm staring at a completely clean slate on my project. I know it's not a z, but it's beating with the same heartbeat.
Registered User
Joined: Nov 2000
Posts: 2,734
From: Kansas City suburb of
Re: will a 3" True Dual setup hurt?
Originally Posted by Rage
Im looking at going with the exact same setup. Im just curious as to how you routed your exhaust and wat not. Did you run them all the way out the back or do you have turn dows? What kind of mufflers...yadayadayada. Let me know.
I don,t mind a little vibration though. and its not nearly as bad as you think.
Last edited by revtime; Feb 17, 2006 at 12:07 AM.
Registered User
Joined: Nov 2001
Posts: 719
From: Summerfield, NC USA
Re: will a 3" True Dual setup hurt?
Straight from Random Technology technician:
Quote--
"Should I go w/ dual 2.5" exhaust w/ dual catalytic converters, or will one 3" cat be fine?"
Considering vehicle weight, I'd use at least two 2-1/2" converters, but my personal preference would be to use dual 3" converters. That's the same configuration we use on Corvettes, which have approximately the same power output as your LT1, but weigh considerably less. You'll hear all kinds of babble about losing torque with a dual 3" system, but that's really more a matter of air/fuel calibration than exhaust size. A single 3" pipe flows slightly less than two 2-1/2" pipes. If you plan to run a single exhaust, the best compromise is probably to run dual 2-1/2" pipes into a single 3"-- mainly because of the outlet diameter of the exhaust manifolds. If you install long tube headers in the future, they will probably have 3" diameter collectors, in which case you'll have to use reducers to match up to your 2-1/2" y-pipe. You'll compromise power a bit with this arrangement, but probably not enough to justify redoing the y-pipe.
The short version- run two 2-1/2" converters or two 3" converters and build the remainder of the exhaust system to fit.
"Should I go w/ dual 2.5" exhaust w/ dual catalytic converters, or will one 3" cat be fine?"
Considering vehicle weight, I'd use at least two 2-1/2" converters, but my personal preference would be to use dual 3" converters. That's the same configuration we use on Corvettes, which have approximately the same power output as your LT1, but weigh considerably less. You'll hear all kinds of babble about losing torque with a dual 3" system, but that's really more a matter of air/fuel calibration than exhaust size. A single 3" pipe flows slightly less than two 2-1/2" pipes. If you plan to run a single exhaust, the best compromise is probably to run dual 2-1/2" pipes into a single 3"-- mainly because of the outlet diameter of the exhaust manifolds. If you install long tube headers in the future, they will probably have 3" diameter collectors, in which case you'll have to use reducers to match up to your 2-1/2" y-pipe. You'll compromise power a bit with this arrangement, but probably not enough to justify redoing the y-pipe.
The short version- run two 2-1/2" converters or two 3" converters and build the remainder of the exhaust system to fit.
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