:: 94' Delsol Dual Exhaust?? ::

[Immortal Sol II]

Hey i was just curious... How hard would it be to put dual exhaust on a del sol... I heard that for dual exhaust the other pipe would have to be cut into the frame... I kno my car isnt supposta have dual exhaust but i think it looks better... And if i have a body kit how do they form the kit around the muffler...

[esp]

back pressure, back pressure, back pressure

[Immortal Sol II]

What about back pressure... Is back pressure good or bad....

[GScivic7]

back pressure is bad...by adding a second muffler to your exhaust your just creating more back pressure. Why do you want dual exhaust anyways...looks tacky as hell on a car with a I4

[Ricochet]

Since you're only going for looks you could just buy a muffler and hang it there..

[1600cc]

LOL...that's funny...

[dejoux]

Backpressure is good for torque at low revs
Less backpressure is good for hp at high rpms

it wont make your car faster to just put a 3" pipe the whole way back, just like everything else its a balancing act.

Twin pipes do look pretty ghey on an I4 though

[Buzz1167]

Ok I guess I don't get the backpressure thing, I mean I know when its good and bad an why. But why is adding a second muffler creating more backpressure? Hes adding another hole for the exuast to get out of, how could that restrict airflow more? And if it is as you say, why do high performance cars have dual exausts like corvettes?
gscivic7-
If dual exausts only create more backpressure (and by your description backpressure is bad), why wouldn't anyone create a single exaust system for a dual exaust car, but rather it usually works the other way around?

Buzz1167
Jon N

[911S_TARGA_RSR]

*HAHA* Duals on a Del Sol *HAHA* Oh shit that was good for a laugh.

<---Thinks about the back pressure

A NOTE TO BUZZ : Cars that have engines that are big enough (not I4s) to handle Duals (e.g come with Dual outs from the engine) work better because they have more exhaust to expell. I4, on the other hand, do not have that much exhaust being produced by the engine so air tends to flow back up the pipe, from the outside. Thus causing Back Pressure.

Just my

[eckoman_pdx]

I am also going to guess that adding a second muffler will reduce the effects and benfits of scavenging. That's probably part of the added backpressure right there.

[hotmaledotcom]

N.A. car especially 4 bangers shouldn't have dual at all, u lose all ur torque, unless u have a high displacement engine

[Privatebigandrew]

I have a 95 Del Sol VTEC model and got dual exhaust installed. It was easier than you think. All the muffler shop had to do was route the other pipe around the other side of the wheel well just like the stock one. To run you through how i did it, and how i personally think is the best way try this. I put DCsports ceramic headers (not required) on, then connecting straigh to that is an airmass high flow Cat, which is then welded to a magnaflow round straight through muffler (it sits right underneath you shift linkage). Then i got a Y-pipe welded to the end of the muffler. From there, one pipe went in the stock routing, and the other on the other side (above the suspension). It all comes out in two sets of beatiful bosal brospeed dual tips (2 1/4) for a quad look. The magnaflow muffler sounds great and performs too. Of course i am sure i have moore back pressure than a single pipe, but still less than stock. The look, sound, and compliments much outweigh the .2 or .3 back pressure difference from a single pipe.

[Ricochet]

Originally Posted by Privatebigandrew

Of course i am sure i have moore back pressure than a single pipe, but still less than stock. The look, sound, and compliments much outweigh the .2 or .3 back pressure difference from a single pipe.

This makes no sense, you won't have more back pressure with larger piping.

The magnaflow muffler sounds great and performs too.

Performs? You're LOSING power by having all these fat pipes sticking off your car. The larger-than-stock yet limited size of an aftermarket single exhaust lets the gasses expand in one direction, out of the muffler. With two huge pipes the gasses will just kind of "hang out" in them, and get sucked back into the combustion chamber instead of fresh air, making the engine run LESS efficiently and LOSE horsepower. Also, I've never heard a good-sounding dual exhaust on a 4 cylinder engine. They've all been loud and gargly pieces of crap, even "professionally" done (brand name mufflers/exhausts installed by muffler shops).

Just like huge spoilers looking good on Indycars because they serve a purpose, dual exhausts only look good on V6's+. Otherwise it's just tacky and teh gheynezz.

[Prelewd]

1 exhaust manifold, 1 exhaust pipe. most efficient design, sounds better, looks better, performs better. Most 600+ hp supras and other I6 cars I have seen have been single exhaust. You also have weight to think about. Unless you REALLY like the looks of it, there's no point. Dual exhaust, I4..

I just thought about how funny it would be if some guy took his camaro, y-piped his exhaust, and had big quad tips.

[eckoman_pdx]

Originally Posted by Privatebigandrew

I put DCsports ceramic headers (not required) on.... Of course i am sure i have moore back pressure than a single pipe, but still less than stock. The look, sound, and compliments much outweigh the .2 or .3 back pressure difference from a single pipe.

Okay, 2 points.

Point Number 1) You have a B16A motor, a 4 cylinder motor. You only have 1 exhaust manifold. This is what the header replaces. A V8 can have "headers" (2 headers). A V8 is essentually 2 4 cylinder motors back-to-back. This is why there are daul exhaust on a V8, because there are 2 headers!!! A a 4-banger can not have more than 1 header, as that requires more than 1 exhaust manifold. You have 1 header, not "headers." Now, you can see why a V8 has daul exhaust and a 4 bander does not. The V8 has a true dual exhaust, you del sol is duel tips, not a duel exhaust, it still is only one pipe and header out of the motor.

Point Number 2) The purpose of the bigger piping on a cat-back system is to free up the airflow, reducing the backpressure. Too much backpressure can mess things up, the gases get backed up, and that slows things down, and can create all sorts of problems. Shrinking the pipes will create backpressure, increasing the size will not. You made the piping bigger, which will not increase backpressure, but reliave it. However, the reason why the duel exhausts can mess things up is it will reduce the effects of scavenging. When you put on a good cat-back system, you free up the airflow, and increase the effects of scavenging. I am well-aware of how a "duel exhaust" is done on a honda, and as I said above, it's not true "duel. "The spilt is near the axel, and piping is run to the other side as well. Exhaust gases split at the piping y-junction, and then flow out the 2 spearate mufflers/tips. However, this split, etc...reduces scavenging, which....shocking....decreases performance. Efficent Scavenging is why those headers you buy like the DC Sports ones work to increase power, and when run with a good exhaust, it free's up more airflow. All the duel exhaust does is serve to defeat this purpose. Sure, you may think it "looks cool," but function wise it just slows things up; reducing scavenging and the power gains assoiated with the exhaust you just paid dearly for. I.E, you make think it looks good, but it serves no real purpose, performance wise. It just messes with things.