Hydra

Why would one go with (true) duals, say dual 2.5"s with an X-pipe over a single 3 or 3.25" system? The single is lighter and cheaper and easier to route under the car. It also loses less energy due to surface friction and heat dissapation... Around how much more power would a well designed dual exhaust give over a well-flowing single (assuming equal cfms)?

Round Rock TA

A single 3" pipe will outflow a duel 2.5" pipe. Most hard heads will say the opposite because it does sound odd. I cannot count the times that I have heard Horsepower type magazines and TV shows explaine the misconception.

J'sRamAir

I think most people get a dual setup so they can have something that sounds different than all the other setups. I have heard only one dual exhaust setup and I just wasn't that impressed...not like I had hoped. In fact, the dude ended up going back to single exhaust because it was too much of a hassle to get a custom dual system made well. High horsepower/drag racers will benefit from dual exhaust that dumps before the axle. This is very cheap and obviously flows well.

Hydra

Actually a dual 2.5" system has 9.8 sq in of cross sectional area, whereas a single 3" has 7.1" of area. Of Course some of its advantage is negated by higher surface friction, heat loss, etc... I was mainly interested in the "tuning" effects of a dual versus an equivalently sized single, assuming of course the dual is equipped with an X pipe. So again, how much more power, if any, is obtainable with dual 2.5"s with an X pipe over a 3" or 3.5" single, given equal cfms?

silversleeper

cutout all the way

Hydra

That's not really an option in my case... So what do you guys say, single or dual?

Chris Spiess

Exhaust is one of those things where there are no real hard and fast rules for things like this. I certainly believe that a x-pipe true dual setup with equal lengths will make more power for big cube motors or F/I motors, it gets murky when you're talking about more common combinations, even high reving LS1 setups with big cams, etc. If you realy want that then go for it, otherwise outside of a special application it simply in't worth the expense, hassle, etc for minimal power increase over a good single system with a mandrel y-pipe.

1CAMWNDR

iTrader: (21)

[quote]Originally posted by spiesscj:
<strong>Exhaust is one of those things where there are no real hard and fast rules for things like this. I certainly believe that a x-pipe true dual setup with equal lengths will make more power for big cube motors or F/I motors, it gets murky when you're talking about more common combinations, even high reving LS1 setups with big cams, etc. If you realy want that then go for it, otherwise outside of a special application it simply in't worth the expense, hassle, etc for minimal power increase over a good single system with a mandrel y-pipe.</strong><hr></blockquote>

I couldn't agree with this more. It was also stated that a dual system is more expensive. Well, not really. There is a guy here with dual 2.5" exhaust with 2 Flowmaster Delta flow mufflers. His whole system cost about $350. Compare that with a Mufflex 3.5" single outlet at $425. Dual outlet is $575. The Corsa 3" system is over $600. <img src="gr_eek2.gif" border="0"> <img src="graemlins/formula.gif" border="0" alt="[Pontiac]" />

Intelman34

Just get a Loudmouth <img src="gr_stretch.gif" border="0">

soliari

To further fuel this converstation, here's a guy that put a "true duel exhaust" on his car and dyno'ed it.

http://ericcer.tripod.com/TA/dyno.htm

As you can see, he gained 14.4 hp and 13.6 TQ.

Advantage true duel????

You can also take a look at what he had to say about one vs. the other.

http://ericcer.tripod.com/TA/true_dual.htm


...by the way, this is NOT my page. still working on other mods exhaust will be coming in a month or two.