gas mileage and exhaust?

[Howard]

<<if it didnt produce a louder sound, noone would get them cuz they might as well stickwith their stock exhaust>>
This explains why there are so many idiots in the world!

 

[Skiguy411]

Originally posted by: Evadman

Originally posted by: Aharami
yes MUFFLERS are meant to muffle noise. but thats stock. i wasnt talkin about that. aftermarket catback exhaust systems have resonators that generate that throttly sound. most people get aftermarket exhausts (not just the muffler) for that throttly sound. if it didnt produce a louder sound, noone would get them cuz they might as well stickwith their stock exhaust

Dear:

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Those always make me laugh

 

[Aharami]

Originally posted by: Evadman

Originally posted by: Aharami
yes MUFFLERS are meant to muffle noise. but thats stock. i wasnt talkin about that. aftermarket catback exhaust systems have resonators that generate that throttly sound. most people get aftermarket exhausts (not just the muffler) for that throttly sound. if it didnt produce a louder sound, noone would get them cuz they might as well stickwith their stock exhaust

Dear:

/junk taken out

Thank you.

wow! you have a template made for that? or did u just type that up? if you did, hats off to ya!

and how am I a ricer? if you look carefully, you'll see that i said i dont want one of those fart pipes. originally i thought getting an exhaust system would increase the performace of my car. that why i posted this thread, but M4H misunderstood me. most aftermaket exhausts ARE louder than stock...and since according to the general consensus here, they dont generate any performance gain. so why would so many people get them? to get the louder noise....thats a reality... people get the mufflers (mind you, just the mufflers, not the entire exhaust) to get the decibels. in a sense i was stickin up for the ricers...my mistake. im actually the opposite....i want my car to be a sleeper....i dont want a loud exhaust that will annoy others cuz i myself get annoyed by loud exhausts

 

[Aharami]

Originally posted by: Vic

Originally posted by: Aharami

Originally posted by: Vic

Originally posted by: geno
It varies from car to car how much of a difference it'll make - what kind of car are we talking about here?

Look up. 2.8L VR6 12V -- an engine that doesn't mod well for extra performance in the 1st place.... but they do sound awesome with the right (not too loud) exhaust.

and do you have any suggestions on what is the "right (not too loud) exhaust?"

I don't own a VW, but the consensus on VWVortex.com seems to be the magnaflow. It's just a cosmetic mod for the most part though, don't expect much of a performance improvement.

If you want it, I say get it. Sporty cars should be heard before they are seen

i wouldnt call my car sporty by any means . sporty cars are cars like G35C or 350Z. now if i put a turbo in mine...then...hmmmm....

but thats too much money for now

 

[Eli]

Originally posted by: Vic
Theoretically, it should either have no effect or should go up very slightly. That and any performance gains would depend on the particular car. Many people see their gas mileage go down slightly after installing a new performance exhaust, but that's usually because the new exhaust causes them to drive a little more... uh, spirited

 

[DivideBYZero]

A pipe with a resonator will make less noise than a straight thru pipe.

PS: Not biting M4H

 

[Howard]

A well-designed aftermarket exhaust will free up some power, but not as much as you expect, given the average state of tuning.

 

[beatle]

Magnaflows have great sound. I wouldn't expect much in the way of a power increase, possibly 1-2 hp. An intake is likely to make your power go up and your mileage go down. Assuming all things equal (they won't be, but just hear me out ) the cooler the air you draw into the engine is, the denser it is, and thus the more oxygen is in it. With more oxygen in the air, your car will add fuel to keep the mixture at the proper air-to-fuel ratio. More air + more fuel = more power (in a general sense).

 

[MercenaryForHire]

Originally posted by: DivideBYZero
A pipe with a resonator will make less noise than a straight thru pipe.

PS: Not biting M4H

:beer:

- M4H

 

[KingNothing]

YAY! The flame form is back!

 

[huesmann]

The way to get more power out of your motor without increasing gas mileage is to increase the amount of fuel actually burned. Note: this is not the same as the amount of fuel used. The exhaust contains a ton of unburned fuel due to the inefficiency of combustion. Basically, you need to increase the amount of air (oxygen) your engine gets so that it burns more fuel. You can do this by increasing the ability of the system to run air through. One way is to increase the size of the vessel through which the air flows, one of which is the exhaust. But increasing the exhaust won't do it alone.

Oh yeah, Borla stainless steel is where it's at.

 

[Howard]

Originally posted by: huesmann
The way to get more power out of your motor without increasing gas mileage is to increase the amount of fuel actually burned. Note: this is not the same as the amount of fuel used. The exhaust contains a ton of unburned fuel due to the inefficiency of combustion. Basically, you need to increase the amount of air (oxygen) your engine gets so that it burns more fuel. You can do this by increasing the ability of the system to run air through. One way is to increase the size of the vessel through which the air flows, one of which is the exhaust. But increasing the exhaust won't do it alone.

Oh yeah, Borla stainless steel is where it's at.

???

Uh oh

 

[MercenaryForHire]

Originally posted by: Howard

Originally posted by: huesmann
The way to get more power out of your motor without increasing gas mileage is to increase the amount of fuel actually burned. Note: this is not the same as the amount of fuel used. The exhaust contains a ton of unburned fuel due to the inefficiency of combustion. Basically, you need to increase the amount of air (oxygen) your engine gets so that it burns more fuel. You can do this by increasing the ability of the system to run air through. One way is to increase the size of the vessel through which the air flows, one of which is the exhaust. But increasing the exhaust won't do it alone.

Oh yeah, Borla stainless steel is where it's at.

???

Uh oh

*sniff sniff*

I smell Uncle Ben's.

- M4H

 

[Howard]

Originally posted by: MercenaryForHire

Originally posted by: Howard

Originally posted by: huesmann
The way to get more power out of your motor without increasing gas mileage is to increase the amount of fuel actually burned. Note: this is not the same as the amount of fuel used. The exhaust contains a ton of unburned fuel due to the inefficiency of combustion. Basically, you need to increase the amount of air (oxygen) your engine gets so that it burns more fuel. You can do this by increasing the ability of the system to run air through. One way is to increase the size of the vessel through which the air flows, one of which is the exhaust. But increasing the exhaust won't do it alone.

Oh yeah, Borla stainless steel is where it's at.

???

Uh oh

*sniff sniff*

I smell Uncle Ben's.

- M4H

...made in a microwave oven. :Q

 

[MustangSVT]

Folgers Can works best.

and it gives 200hp to wheels if combined with enough stickers and cut spring!

 

[MercenaryForHire]

Originally posted by: MustangSVT
Folgers Can works best.

and it gives 200hp to wheels if combined with enough stickers and cut spring!

And don't forget about TEH ...

- M4H

 

[Zenmervolt]

Originally posted by: Aharami
they dont generate any performance gain. so why would so many people get them?

Because people are stupid and they fall for phony advertising claims instead of listening to mechanics. There is a minor bit of accoustic tuning that can be done by changing exaust systems, but the point is to change the tone of the sounds, and not the loudness unless you're putting aftermarket pipes on a Harley. (For the record, I have nothing against loud Harleys, I ride a motorcycle and I can completely understand where the "loud pipes save lives" people are coming from. People in cars just don't pay attention to bikes unless there's something to snap them into reality.)

ZV

 

[DuffmanOhYeah]

Typically, you can expect next to nothing in gains if you weren't already constrained. Like running a large turbo with one of those old civic 1" exhausts. Generally, and this is not always true, Larger exhaust will net you a little in the top end, but cost you in the low. Opposite for smaller pipe.