The Truth Behind Quad Setups. Seperating Fact and Fiction.
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Joined: Oct 2004
Posts: 1,578
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From: Peachtree City Georgia
My Ride: 2004 e60 M5 Replica
Titanium Silver
Premium Package
Premium Sound Package
Adaptive Xenon's
Apple iPhone cell interactive pared with iDrive Bluetooth setting
19 inch BMW OEM 166M rims,
Michelin tires
Sprint Booster - V2
Fidelity / BMW Extended Warranty 7 year / 100,000 miles
I know everyone here states that quad setups will lose horsepower and based on common knowledge of exhaust system backpressure, I can understand how you'd lose low-end power, which everyone talks about, however how about the top-end? In theory wouldn't the quad setup provide better top-end performance than a more restrictive single-sided exhaust system with higher backpressure? Does anyone have empirical data to support that a quad setup would indeed impair performance throughout the entire power band?
Also, couldn't one achieve the same or close to stock backpressure by using different exhaust tube diameters and lengths to create the backpressure needed to retain low-end performance? It just seems that it is quite a bold statement to say that with any quad setup, you'll lose power. Personally it sounds like there just hasn't been a quad setup that has been developed correctly, unless of course we have data to support these claims.
Anyone?
I am looking to do a quad setup soon so I'd really like to hear what efforts have been made to prove that a quad setup will indeed impair performance. And please don't post "Butt Dyno" results, as there are so many various conditions that can play a role in how your engine performs between not having quads and having quads.
Looking forward to hearing from the crowd!
Also, couldn't one achieve the same or close to stock backpressure by using different exhaust tube diameters and lengths to create the backpressure needed to retain low-end performance? It just seems that it is quite a bold statement to say that with any quad setup, you'll lose power. Personally it sounds like there just hasn't been a quad setup that has been developed correctly, unless of course we have data to support these claims.
Anyone?
I am looking to do a quad setup soon so I'd really like to hear what efforts have been made to prove that a quad setup will indeed impair performance. And please don't post "Butt Dyno" results, as there are so many various conditions that can play a role in how your engine performs between not having quads and having quads.
Looking forward to hearing from the crowd!
BMW OWM rear bumper 250.00 (installing) and the REMUS QUAD for 899.00 tips and all and Lifetime warranty and love it!
www.bavautosport.com aka Bavarian auto sport
Hope this helps!
Presley348
Contributors
Joined: Oct 2004
Posts: 1,578
Likes: 0
From: Peachtree City Georgia
My Ride: 2004 e60 M5 Replica
Titanium Silver
Premium Package
Premium Sound Package
Adaptive Xenon's
Apple iPhone cell interactive pared with iDrive Bluetooth setting
19 inch BMW OEM 166M rims,
Michelin tires
Sprint Booster - V2
Fidelity / BMW Extended Warranty 7 year / 100,000 miles
I know everyone here states that quad setups will lose horsepower and based on common knowledge of exhaust system backpressure, I can understand how you'd lose low-end power, which everyone talks about, however how about the top-end? In theory wouldn't the quad setup provide better top-end performance than a more restrictive single-sided exhaust system with higher backpressure? Does anyone have empirical data to support that a quad setup would indeed impair performance throughout the entire power band?
Also, couldn't one achieve the same or close to stock backpressure by using different exhaust tube diameters and lengths to create the backpressure needed to retain low-end performance? It just seems that it is quite a bold statement to say that with any quad setup, you'll lose power. Personally it sounds like there just hasn't been a quad setup that has been developed correctly, unless of course we have data to support these claims.
Anyone?
I am looking to do a quad setup soon so I'd really like to hear what efforts have been made to prove that a quad setup will indeed impair performance. And please don't post "Butt Dyno" results, as there are so many various conditions that can play a role in how your engine performs between not having quads and having quads.
Looking forward to hearing from the crowd!
Also, couldn't one achieve the same or close to stock backpressure by using different exhaust tube diameters and lengths to create the backpressure needed to retain low-end performance? It just seems that it is quite a bold statement to say that with any quad setup, you'll lose power. Personally it sounds like there just hasn't been a quad setup that has been developed correctly, unless of course we have data to support these claims.
Anyone?
I am looking to do a quad setup soon so I'd really like to hear what efforts have been made to prove that a quad setup will indeed impair performance. And please don't post "Butt Dyno" results, as there are so many various conditions that can play a role in how your engine performs between not having quads and having quads.
Looking forward to hearing from the crowd!
BMW OWM rear bumper 250.00 (installing) and the REMUS QUAD for 899.00 tips and all and Lifetime warranty and love it!
www.bavautosport.com aka Bavarian auto sport
Hope this helps!
Presley348
Members
Joined: Oct 2009
Posts: 143
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From: SF Bay Area
My Ride: 550i
Model Year: 2008
Cool thanks! If I go to the event in San Jose I'll probably just go to coffee on Saturday morning at Santa Row, let me know if you can make it!
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Joined: Apr 2009
Posts: 1,122
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From: Seattle
Members
Joined: Apr 2011
Posts: 136
Likes: 0
From: northern new jersey
My Ride: [IMG]http://i848.photobucket.com/albums/ab48/big525i/IMG_20110329_082033-1.jpg[/IMG]
2005 525i mtech front and rear bumper Magnaflow custom quad tip exhaust with some carbon fiber goodies and staggered VMR VB3 wrapped in Nitto Invos
i run a custom magnaflow quad i threw in an x pipe figuring if i throw it in ill gain some torque back and u feel it if u go this route it will probably cost 600 bucks for the muffler x pipe and it all welded up
Members
Joined: Jul 2010
Posts: 110
Likes: 0
From: Atlanta, GA
I want something that will not lose low end torque abut little more quiet then "west" and "socalE39" setup would this be a good setup? from OEM cat - OEM resonator - Mangaflow X muffler #11385 - OEM center resonator - Mangapack # 10425 on each side to dual tips on each side?
I have a 08 550i
I have a 08 550i
Members
Joined: Apr 2011
Posts: 136
Likes: 0
From: northern new jersey
My Ride: [IMG]http://i848.photobucket.com/albums/ab48/big525i/IMG_20110329_082033-1.jpg[/IMG]
2005 525i mtech front and rear bumper Magnaflow custom quad tip exhaust with some carbon fiber goodies and staggered VMR VB3 wrapped in Nitto Invos
quads done the wrong way will loose power done the right way depending on the muffler used lets say magnaflow straight thru like I have will loose you power in the low end if you do a x pipe before the muffler and resonators after the maganaflow mufflers I felt more low end the car is quiter but im getting a stett performance header so it will get loud again
Members
Joined: Apr 2011
Posts: 136
Likes: 0
From: northern new jersey
My Ride: [IMG]http://i848.photobucket.com/albums/ab48/big525i/IMG_20110329_082033-1.jpg[/IMG]
2005 525i mtech front and rear bumper Magnaflow custom quad tip exhaust with some carbon fiber goodies and staggered VMR VB3 wrapped in Nitto Invos
like here is my set up maganaflow universal x pipe into magnaflow muffler and slp shotgun resonators after the mufflers
