Dual exhaust question

[GreatRiverDucker]

Re: Dual exhaust question

JFC- right on man, I put duals straight out the back on my ranger and with the topper on, the exhaust is messed up.
The laws in your state suck a%# , not that I'm for really loud exhaust or anything, but that's really lame. I guess too many old-timers can't handle the noise?!

Hey Gary - good luck man! I hope it helps with the "popping".

BTW FYI - In MN the only such laws are in regards to catalytic converters- at least as far as I know.

 

[SpinnerBait_Nut]

Re: Dual exhaust question

Hey Gary, forget the mufflers man.
Put on a set of Headmans, run into a 3" collector, put on 3" stainless back to the rear and won't have to worry about the popping sound.
Yehawwwww!!!!!!!!!!

 

[Skinnywater]

Re: Dual exhaust question

When I did this frame-off a few years ago the exaust was the final item. This was the day it came back muffler shop.
I absolutely hate a popping, raspy exaust tone.
This '74 has a, "built" 460 4V low compression out of a Lincoln.
The exaust is Summit headers, dual 3" pipes, a simple cross-over (H pipe), two 36" generic cherrybombs, and bologna cut chrome tips that exit behind the rear wheels.

I don't know if it gets more attention from the exaust or the secondarys.

It's loud enough for the wife to complain but quiet enough to get a thumbs up from the nieghbors........just right.

 

[NeverEnough02]

Re: Dual exhaust question

By no means do you need an X pipe or H pipe. It will even out the back pressure for you but if your truck is making a spitting sound it is the mufflers or your motor. Ever here a Z06? It sound nothing like a V-8 and everything like me hocking a luggie. Its raw power that you are hearing most likely. Flowmasters have a much deeper sound but they are also have the worst resonation on the 4.8, 5.3, and 6.0. You should be good with just the flowmasters added on. It will mellow things out for you. Changing your cats will make a huge difference in sound (more than the mufflers). Check out youtube and crap like that for sound clips. Most people have very detailed descriptions of what they put on there. I am on GMFULLSIZE.com and there are quite a few write ups on exhausts. Unless people are building their motor out for full performance, they usually dont have a need for an x pipe.

 

[Lakester]

Re: Dual exhaust question

hello,

generally late-model efi trucks will produce more bottom end torque with a single exhaust upgrade such as a Gibson. the days of true duals are not the way to go on the efi truck engine.

regards
lakester

 

[NeverEnough02]

Re: Dual exhaust question

hello,

generally late-model efi trucks will produce more bottom end torque with a single exhaust upgrade such as a Gibson. the days of true duals are not the way to go on the efi truck engine.

regards
lakester

His 5.7 is going to do much better witht the duals. The constriction point is at the headers. Even on the 08 GM motors you are much better with duals. Always go with a long tube header though! They give up to 25 RWHP on a properly tuned 5.3 while shorts give about 1-3 RWHP. All depends on the tuning! Get some sound clips posted of your truck. It would help before you dump off a lot of money to get minimal results.

 

[MikDee]

Re: Dual exhaust question

Gary, I have a Flow orig 40 on my 96' Sonoma 4.3V6 for a long time now, it sounds ok, but all the flowmasters sound the same to me, and it seems everyone has one. When I change mine, I'm going with the better sounding IMCO or Cherry Bomb PRO series, Anyway, check this out, You should enjoy browsing here, there's plenty of variations to listen to:
"http://www.fullsizechevy.com/forums/general-discussion/performance/exhaust/"

 

[Gary H NC]

Re: Dual exhaust question

Thanks MikDee,I will check it out!

Man, that website i could read for hours.....Its a good site! Thanks!

 

[MikDee]

Re: Dual exhaust question

Thanks MikDee,I will check it out!

Man, that website i could read for hours.....Its a good site! Thanks!

LOL,,, That's what takes up 1/2 my time too, by the way here's a link for a couple of comparison sound clips of a Flow super 40, and a Cherry Bomb Extreme (but this version is a single chamber muffler though) the PRO is the same tone but not quite as loud:
"http://www.fullsizechevy.com/forums/general-discussion/performance/exhaust/308300-swapping-out-super-40-cherry-bomb-extreme-vid-inside.html"

 

[NeverEnough02]

Re: Dual exhaust question

GMfullsize.come is very good as well. For high tech motor info with dyno sheets to back mods the go to LS1tech.com. That site is loaded with awsome info on these motors.

 

[DJ]

Re: Dual exhaust question

Exhaust systems are very sensitive to "tuning" to optimize extraction of exhaust gasses and minimization of racket. Guys like Stillen engineer those things as though they were engineering a sound system or a musical instrument.

Everything counts. Length, diameter, converter geometry, "muffler" geometry and. . .what you don't have. . .interaction of pressure pulses from different cylinders or different banks of cylinders.

I think you need Flowmasters, first of all, and you probably need and "H" or "X" crossover to allow the two banks to cancel one another's sharp edged pressure pulses.

JB is spot on. That's why you can't get a Camaro to sound as sweet as a Mustang GT, no matter what you do. GM didn't put any resources into the exhaust note.

Aftermarket exhaust systems just aren't going to get there. Aftermarketers don't have the resources to "tune" a system like the OEM's do.

I would suggest looking at systems directly from GM. They had some decent systems on some of their SS trucks.

 

[MikDee]

Re: Dual exhaust question

JB is spot on. That's why you can't get a Camaro to sound as sweet as a Mustang GT, no matter what you do. GM didn't put any resources into the exhaust note.

Aftermarket exhaust systems just aren't going to get there. Aftermarketers don't have the resources to "tune" a system like the OEM's do.

I would suggest looking at systems directly from GM. They had some decent systems on some of their SS trucks.

Yeah, GM was using Corsa, and now use Borla, for their high end truck exhaust systems,,, I LOVE the previous Corsa, not so much the new standard Borla, but I like neither when you see the price $$$ And they cater to, or favor selling complete Catback systems to boot, not mufflers, or individual parts, so that's the name of that tune! If you got the desire, and the dough, it's the way to go.

The only reason a Mustang sounds so good, is because of that large 4" bore, & Short 3" stroke on the 302,,, The early Chevy Z28- 302's with the Exact same bore, & stroke, sounded just as good, if not better, being radically modded from the factory, especially when slightly tweaked and averaging 8k rpm.

 

[ThumbPkr]

Re: Dual exhaust question

In the "OLD" days it was common and accepted to hear the popping and backfiring in the exhaust with glasspacks or straight pipes as the case may be.What happens is that the mixture has been leaned out because of better exhaust evacuation and cannot support complete combustion so that you are hearing it as popping instead of a steady sound.We used to remove a vacuum hose from the intake manifold years ago to make it pop even more!!)
If you wind it up in gear and let off the throttle without allowing it to upshift you can get that much sought after ripple sound that the Chevy V8s were so good at.It makes the hair stand up on my arms when I hear that fabulous sound)
The Fords sounded good too but it seems like the Chevys were the best.
Chrysler had a different sound,more like a fine tuned machine which I also enjoyed but one of the best sounding engines of all time to me is the 6 cylinder Chevy with headers or a split manifold.Sweet!!Ron G