True Duals Cost POWER!?!?!??
Banned
Joined: Feb 2008
Posts: 26
Likes: 0
Yet you give out the area of a circle formula like it proves that a particular exhaust will make more power based on area alone. Like you were the only person in the thread that could figure out the area of a circle. 
Then come to find out you likely dont even have a car let alone a modded one and you cite "internet racing" as a reason not to say anything. I guess 90% of the sites members, moderators, and admin are all internet racers since we tell people what we have.
Then come to find out you likely dont even have a car let alone a modded one and you cite "internet racing" as a reason not to say anything. I guess 90% of the sites members, moderators, and admin are all internet racers since we tell people what we have. No, I gave that out to that particular bonehead because he stated that it would take a 5" single pipe to duplicate the flow of two 2.5" pipes. I hope he was being sarcastic because that honestly was the most boneheaded statement I've ever heard on the internet. And simple math can prove it.
Banned
Joined: Feb 2008
Posts: 26
Likes: 0
Thats all I was trying to point out. Also.....
Don't you think its ironic that the 2.5" dual exhaust here is good for only 2% more power than the single 3.5" y-pipe? Wow, and the 2.5" dual just happens to have 2% more flow area than the single 3.5". wow, amazing.....coincidence?? Still think flow area has nothing to do with power obtained from exhaust? And this is from an article written by a guy who has more credibility in his dirty sock than you or I put together!! LOL.
"Hey guys I just got done reading a good article in the May 2005 issue of Popular Hot Rodding Magazine. The article was written by David Vizard who seems to be one of the most accredited and respected people in the automotive performance world. In the article he stated that CFM is a great way to help develop a zero loss exhaust system. For zero loss a exhaust must flow 2.2 CFM per horsepower(This means less than 1% of total power produced by the engine is lost due to back pressure.). From reading the article I think that a lot of people that see gains when going from a 2.5” exhaust system to a 3” dual system see them because the muffler on the 2.5” system didn’t flow enough for their application. David stated that per square inch of exhaust tubing there is 115 CFM of flow. So plugging some numbers into the good ole TI-89….. ((3.14 * radius^2)*115[*2 for a dual exhaust system])/2.2 = Max hp supported with zero loss
A 2.75” (stock) single system is good for a 310hp engine with zero loss…
A 3” Single system is good for a 370hp engine with zero loss…
A 3.5” Single system is good for a 503hp engine with zero loss…
A 4” Single system is good for a 657hp engine with zero loss…
A 2.25” dual system is good for a 457hp engine with zero loss…
A 2.5” dual system is good for a 513hp engine with zero loss…
A 3” dual system is good for a 812hp engine with zero loss…
A 2.75” (stock) single system is good for a 310hp engine with zero loss…
A 3” Single system is good for a 370hp engine with zero loss…
A 3.5” Single system is good for a 503hp engine with zero loss…
A 4” Single system is good for a 657hp engine with zero loss…
A 2.25” dual system is good for a 457hp engine with zero loss…
A 2.5” dual system is good for a 513hp engine with zero loss…
A 3” dual system is good for a 812hp engine with zero loss…
Tech Resident
Joined: Jan 2006
Posts: 5,117
Likes: 3
From: Philly
It's not "bad" as in harmful, but you are costing yourself considerable power by not having a crossover pipe. You're not getting the scavenging effect through your exhaust, so that's a big disadvantage for you.
were not all pro racers here. Moral of the story is use the setup you want and like for your application. I went y pipe, TD, now im going back to y pipe because I dont want to drive to a out of state reputable shop to get one fabricated. I also trapped just as fast with both setups. My TD is shitty because it is mild steel, starting to rust, and I wanted tips out the back. It just felt not up to par. In the end people will judge your car no matter what but when they go home its not in their garage. DO WHAT YOU WANT WITH YOUR CAR!
Just my quick 2cents. My friend was stuck in the 10.80s with a true dual set up. Switched to a Y-pipe and Hooker muffler and the very next time at the track he pulled a 10.71. I have no clue why but he was in the 10.80s for 6 months. For what its worth.
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Well, a dedicated pipe for each exhaust manifold vs. channeling ventilation from each manifold and restricting flow into a single pipe, then split it into two pipes. Is it possible that it is better to have higher cfm velocity than unbalanced airflow?
Why do corvettes have true duals instead of the Y pipe?
Nothing against the Y pipe. My camaro has one, however I would have gone with true duals if it were an option when the exhaust was installed.
Why do corvettes have true duals instead of the Y pipe?
Nothing against the Y pipe. My camaro has one, however I would have gone with true duals if it were an option when the exhaust was installed.
TECH Apprentice
Joined: Nov 2007
Posts: 316
Likes: 0
From: DelrayBeach/Tampa,Florida
i read in a old carcraft article that the further back you put the muffler the better it makes power. Also i heard that alot od back pressure is bad but if u got with lik 5 inch pipe you wil kill your power. so i gues a little is good.
