True Duals? some questions

rammanriley20 · Feb 27, 2015

so as of now i have a catback exhaust system made by Dynomax. The system came on the truck when i bought it exactly how it is. It has a cat converter as well as a muffler but im not sure if it is a high flow cat or what type of muffler is on it. It sounds great at idle not too loud not too quiet it has a really nice deep rumble and i love it, but it just lacks some "umph" when you step on the gas. it doesnt sound quite right at higher RPM's and i want this baby to RAP when i hit the gas! i heard a guy who had a 5.9 and was running true duals and it sounded amazing! it had what i was looking for when he revved it up. so my question is if i go with true duals will my easiest route to go be buying a set of long tube headers? and will there be any problems swapping to long tubes? and is there any problems in general when swapping to true duals?

rowdyram · Feb 27, 2015

I don't know if long tubes will fit but I can tell you that doing long tubes and duels will cause a loss in throttle response and low end power. It will also cause a lean idle and backfiring if not done correctly

dodge dude94 · Feb 27, 2015

If you wanna spend money.....shorty headers, true duals, X-pipe, and some form of straight through muffler, with 4in tips. lol

rammanriley20 · Feb 27, 2015

rowdyram said:
I don't know if long tubes will fit but I can tell you that doing long tubes and duels will cause a loss in throttle response and low end power. It will also cause a lean idle and backfiring if not done correctly

i wasnt sure if long tubes or shortys would be better, first im just gonna get a high flow cat and a glasspack to see if i like the sound better.

dapepper9 · Feb 27, 2015

You should post up an exhaust vid if you haven't already. Not many running dynomax

dodge dude94 · Feb 27, 2015

I've got Dynomax.......

on the 76. :hidesbehindsofa:

rowdyram · Feb 27, 2015

If you do duals I would not go larger than 2.25 dia and even that might be pushing it

dodge dude94 · Feb 27, 2015

You can go bigger if you run a Chokemaster....being they don't actually flow worth a damn. :laughing1:

bassslayer25 · Feb 27, 2015

Go with flowmaster super 10 if you want aggressive sound. I have the muffler 2 notches down and mine is pretty damn loud. Plus they are only like 90-100 bucks. You wont loose any throttle response and you wont break the bank.

dapepper9 · Feb 27, 2015

On the '76 with 400 big block lol. Sounds good tho.

You out flowmaster on and you can prob go up to 2.25-2.5" pipe

Graygoose · Feb 27, 2015

For best sound, do 2.5" exhaust.

rammanriley20 · Feb 27, 2015

how do i link an exhaust vid? i have one on instagram if anyone has that!

HammerHead · Feb 27, 2015

rammanriley20 said:
so as of now i have a catback exhaust system made by Dynomax. The system came on the truck when i bought it exactly how it is. It has a cat converter as well as a muffler but im not sure if it is a high flow cat or what type of muffler is on it. It sounds great at idle not too loud not too quiet it has a really nice deep rumble and i love it, but it just lacks some "umph" when you step on the gas. it doesnt sound quite right at higher RPM's and i want this baby to RAP when i hit the gas! i heard a guy who had a 5.9 and was running true duals and it sounded amazing! it had what i was looking for when he revved it up. so my question is if i go with true duals will my easiest route to go be buying a set of long tube headers? and will there be any problems swapping to long tubes? and is there any problems in general when swapping to true duals?

Take the time to read these articles, you will make a better exhaust decision and save some $$.

exhaustbackpressure

Exhaust: The straight scoop on backpressure | DSMtuners

Exhaust Theory | NSX Prime

http://www.cobbtuning.com/Technical-...es-s/70676.htm

http://www.endtuning.com/exhaustsystems/

bassslayer25 · Feb 27, 2015

Trust me. You will not be disappointed with flowmaster. Id either get super 44 or super 10. By far my favorite purchase since ive owned the truck for almost a year and half now.

dapepper9 · Feb 27, 2015

rammanriley20 said:
how do i link an exhaust vid? i have one on instagram if anyone has that!

I usually just post em to YouTube and add hyperlink

rowdyram · Feb 27, 2015

Most gas engines need about 2.2 cfm of exhaust flow per HP a pipe flows 110cfm per square inch. 2.25 pipe has a sa of 3.55 inches flows about 408 cfm so dual 2.25 pipe will handle just shy of 400 HP. Dual 2 inch is what you need. Don't over do it. You'll be sorry, I promise.

1SilverBullet2 · Feb 27, 2015

I have a si/ do super 10 on my truck, I love it! I have 2.5" pipe with no cat and shorty headers. I'd like to do true dual with super 10's someday.

Graygoose · Feb 27, 2015

rowdyram said:
Most gas engines need about 2.2 cfm of exhaust flow per HP a pipe flows 110cfm per square inch. 2.25 pipe has a sa of 3.55 inches flows about 408 cfm so dual 2.25 pipe will handle just shy of 400 HP. Dual 2 inch is what you need. Don't over do it. You'll be sorry, I promise.

dual 2? With mufflers, will sound terrible. 2.25" with Flowmaster is ok, but deeper rumble with 2.5" per side. And it wont kill lowend at all.

rowdyram · Feb 27, 2015

I guess if sound is all your after, all I'm doing is giving my professional input. After all its not my truck..

Graygoose · Feb 27, 2015

Well, assume most put mufflers on for sound. 2" will sound like a Honda with a glasspack.
Minimum I'd do is 2.25".

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