TRUE DUALS WITH X PIPE?????????
TRUE DUALS WITH X PIPE????????? I recently emailed MAC performance about a set of starter tubes for my headers, and the technician that responded emailed me a said that true duals and x pipe will not increase horse power or torque at all, they say that our system is set up to be equal to a x pipe or h pipe with true duals. DOES ANY ONE HAVE ANY BEFORE AND AFTER DYNO SHEETS THEY CAN POST SO I CAN PROVE TO THEM THAT IT DOES. or are they right? 
mac.
mac.
Re: TRUE DUALS WITH X PIPE????????? or if any one has any first hand experience they can tell me about it would br great. if all this set up is going to do is make it sound better, then i can spend the money else where
Re: TRUE DUALS WITH X PIPE????????? I think most experts would agree there's no question that true duels are capable of flowing better than a single tube catback exhaust. How much power you gain would depend on what has been done to your engine.
Re: TRUE DUALS WITH X PIPE????????? i agree, i am just realy curious about the nembers i guess, i mean how much more power will a true dual system give you over a ory pipe and a good cat back
Re: TRUE DUALS WITH X PIPE?????????
i agree, i am just realy curious about the nembers i guess, i mean how much more power will a true dual system give you over a ory pipe and a good cat back
Re: TRUE DUALS WITH X PIPE?????????
i agree, i am just realy curious about the nembers i guess, i mean how much more power will a true dual system give you over a ory pipe and a good cat back
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TECH Resident
Joined: Mar 2003
Posts: 770
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From: Troy Al
Re: TRUE DUALS WITH X PIPE????????? LS1 Tech Stories
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Verdad Gallardo Re: TRUE DUALS WITH X PIPE????????? That's a good thread, nice to see the dyno comparison. Looks like at least 5 hp gain over the entire rpm range, and close to 20 hp in some places. I think I see 3" duals in my future!
Re: TRUE DUALS WITH X PIPE????????? thanks for the info. guys , i think im going to get the 3in into 3 inch kit from dr. gas for $199.99 and two 12 inch dynomax bullita at 35 bucks a pop. and weld them my self. but that seems like a lot of money for 5 hp. but i hope the sound is worth it.
Re: TRUE DUALS WITH X PIPE?????????
thanks for the info. guys , i think im going to get the 3in into 3 inch kit from dr. gas for $199.99 and two 12 inch dynomax bullita at 35 bucks a pop. and weld them my self. but that seems like a lot of money for 5 hp. but i hope the sound is worth it.
Re: TRUE DUALS WITH X PIPE????????? There is is a great gain, even on a stock car, with the 3" out to the DR GAS X to bullets. I used that when the car ran the 11.49 on just bolt ons, and a little ol Vig 3200. It was loud on the car, but dont expect to talk on the phone, or hold a conversation with someone sitting right next to you.
Maybe mine was missing the insulation from under the stock carpet.
A little weight reduction never hurt anyone.
Maybe mine was missing the insulation from under the stock carpet.
A little weight reduction never hurt anyone. Re: TRUE DUALS WITH X PIPE????????? I did some calculations on the cross sectional area of different tubes, since flow is proportional to that. Flow is not proportional to diameter. Here's the results in order of flow potential:
Single 3.0" = 7.07 sq. inches
Single 3.5" = 9.62 sq. inches
dual 2.5" = 9.80 sq. inches
Single 4" = 12.56 sq. inches
dual 3.0" = 14.14 sq. inches
dual 3.5" = 19.24 sq. inches
I think a dual 3.0" is what I want!
Single 3.0" = 7.07 sq. inches
Single 3.5" = 9.62 sq. inches
dual 2.5" = 9.80 sq. inches
Single 4" = 12.56 sq. inches
dual 3.0" = 14.14 sq. inches
dual 3.5" = 19.24 sq. inches
I think a dual 3.0" is what I want!
TECH Apprentice
Joined: Aug 2003
Posts: 335
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From: Vacaville, CA
I picked up 41hp and 36 ft. lbs. 
when I went from stock manifolds, stock y, cats, and hooker catback... to Pacesetter coated LT's, and true duals with x-pipe and dynomax bullets. I know headers couldnt make a 41 hp difference, so the true duals had to make up some of that. And my car isn't that loud at cruise speed, i had the tips turned down at a 45 degree instead of straight down.
when I went from stock manifolds, stock y, cats, and hooker catback... to Pacesetter coated LT's, and true duals with x-pipe and dynomax bullets. I know headers couldnt make a 41 hp difference, so the true duals had to make up some of that. And my car isn't that loud at cruise speed, i had the tips turned down at a 45 degree instead of straight down. 
I liked my 3" Hedman x-pipe, and it was only $100...My car had the turndowns at 45 degrees, and it still rattled everything that wasn't bolted down inside the car at highway cruising RPM, but smoothed out once you got it over about 2200 or so RPM..but you can't beat the sound..I had so many compliments and thumbs up. Especially from truckers on the interstate..
