Any exhausts for the 545i that DONT lose power?
01-11-2009, 03:41 PM
#1
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My Ride: 545i
I've been looking into the purchase of an exhaust for my 545i for some time and was waiting for RPI's offering (with proven gains), but since their product seems to be in limbo, I'm now looking at some other options.
Thing is, the majority of exhausts for the 545 seem to lose power. My personal philosophy on car modifications dictates that any modification that loses power shall not be considered
. Other than Dinan, are there any exhausts out there that show proven gains?
So far, I've found the following testimonials:
Power loss:
Magnaflow: http://forums.e60.net/index.php?s=&sho...st&p=710359
B&B: http://forums.e60.net/index.php?showtopic=...mp;#entry242216
http://forums.e60.net/index.php?showtopic=...mp;#entry245962
http://forums.e60.net/index.php?s=&sho...st&p=242606
No change:
Remus: http://forums.e60.net/index.php?s=&sho...st&p=502531
Any help would be appreciated
Thing is, the majority of exhausts for the 545 seem to lose power. My personal philosophy on car modifications dictates that any modification that loses power shall not be considered
. Other than Dinan, are there any exhausts out there that show proven gains?So far, I've found the following testimonials:
Power loss:
Magnaflow: http://forums.e60.net/index.php?s=&sho...st&p=710359
B&B: http://forums.e60.net/index.php?showtopic=...mp;#entry242216
http://forums.e60.net/index.php?showtopic=...mp;#entry245962
http://forums.e60.net/index.php?s=&sho...st&p=242606
No change:
Remus: http://forums.e60.net/index.php?s=&sho...st&p=502531
Any help would be appreciated
01-11-2009, 04:18 PM
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My Ride: 2004 545i, Sport and Premium package, Titanium Silver with Black Dakota Leather interior
IMO, any loss or gain in hp from catback will be unnoticeable. Unless you are gonna do headers, pipes, etc just base your choice on SOUND.
01-11-2009, 04:57 PM
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My Ride: 2007 E63 AMG | Obsidian Black | Schwarzes Nappa | Black BirdEye Maple | Premium II Package | Electronic Trunk Closer | Parktronic
Engine: RPi/Powerchips custom ECU tune, RPi Ram Air Kit (BMC filter, scoops), RennTech Sport exhaust, secondary cats, charcoal and resonator delete, custom AAA x-pipe
Exterior: 50% side windows / 35% rear window Formula One Pinnacle Series | Flat AMG hood emblem
Suspension: Renntech Lowering Module
Wheels/Tires: Radenergie R10, Falken FK452 245/30/20, Yokohama ADVAN Sport 285/25/20
-----------------------------------------
2005 545i Sport SMG | Ti Grau | Schwarzes Dakota | Anthracite Maple | Logic 7 | Nav
Engine: Custom AFE CAI, Superchips ECU remap, Sprint Booster, RDSport Dual Exhaust Conversion with Quad Pipes and X-pipe, 3 resonators deleted, 90mm tips!
Exterior: M-Tech Aero kit | M5 Mirrors | M5 Rear Bumper | Trunk Lid Finisher | Vorsteiner decklid spoiler | 50% Formula One Pinnacle Tint
Suspension and Brakes: Bilstein PSS9 coilovers, JBT BBK: 16" cross-drilled rotors, 8 piston and 15" cross-drilled rotors, 4 piston
Wheels: VIP Modular VR 02 20x9F, 20x10R | Toyo T1R 245/30/20F, 285/25/20R
Lights: PIAA 4150K Xtreme White Plus fog lights, AIB v3
MOST IMPORTANT: Hardwired V1; =)
ED Date: 4/7/05, Re-delivery date: 5/21/05
Originally Posted by rogerj' post='765410' date='Jan 11 2009, 05:18 PM
IMO, any loss or gain in hp from catback will be unnoticeable. Unless you are gonna do headers, pipes, etc just base your choice on SOUND.
01-11-2009, 08:42 PM
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My Ride: 2007 E63 AMG | Obsidian Black | Schwarzes Nappa | Black BirdEye Maple | Premium II Package | Electronic Trunk Closer | Parktronic
Engine: RPi/Powerchips custom ECU tune, RPi Ram Air Kit (BMC filter, scoops), RennTech Sport exhaust, secondary cats, charcoal and resonator delete, custom AAA x-pipe
Exterior: 50% side windows / 35% rear window Formula One Pinnacle Series | Flat AMG hood emblem
Suspension: Renntech Lowering Module
Wheels/Tires: Radenergie R10, Falken FK452 245/30/20, Yokohama ADVAN Sport 285/25/20
-----------------------------------------
2005 545i Sport SMG | Ti Grau | Schwarzes Dakota | Anthracite Maple | Logic 7 | Nav
Engine: Custom AFE CAI, Superchips ECU remap, Sprint Booster, RDSport Dual Exhaust Conversion with Quad Pipes and X-pipe, 3 resonators deleted, 90mm tips!
Exterior: M-Tech Aero kit | M5 Mirrors | M5 Rear Bumper | Trunk Lid Finisher | Vorsteiner decklid spoiler | 50% Formula One Pinnacle Tint
Suspension and Brakes: Bilstein PSS9 coilovers, JBT BBK: 16" cross-drilled rotors, 8 piston and 15" cross-drilled rotors, 4 piston
Wheels: VIP Modular VR 02 20x9F, 20x10R | Toyo T1R 245/30/20F, 285/25/20R
Lights: PIAA 4150K Xtreme White Plus fog lights, AIB v3
MOST IMPORTANT: Hardwired V1; =)
ED Date: 4/7/05, Re-delivery date: 5/21/05
Your butt dyno isn't a true indicator of whether you lost power or not. RPi has dynoed a 545i with Magnaflows that showed a loss of power.
01-11-2009, 09:01 PM
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My Ride: 2007 E63 AMG | Obsidian Black | Schwarzes Nappa | Black BirdEye Maple | Premium II Package | Electronic Trunk Closer | Parktronic
Engine: RPi/Powerchips custom ECU tune, RPi Ram Air Kit (BMC filter, scoops), RennTech Sport exhaust, secondary cats, charcoal and resonator delete, custom AAA x-pipe
Exterior: 50% side windows / 35% rear window Formula One Pinnacle Series | Flat AMG hood emblem
Suspension: Renntech Lowering Module
Wheels/Tires: Radenergie R10, Falken FK452 245/30/20, Yokohama ADVAN Sport 285/25/20
-----------------------------------------
2005 545i Sport SMG | Ti Grau | Schwarzes Dakota | Anthracite Maple | Logic 7 | Nav
Engine: Custom AFE CAI, Superchips ECU remap, Sprint Booster, RDSport Dual Exhaust Conversion with Quad Pipes and X-pipe, 3 resonators deleted, 90mm tips!
Exterior: M-Tech Aero kit | M5 Mirrors | M5 Rear Bumper | Trunk Lid Finisher | Vorsteiner decklid spoiler | 50% Formula One Pinnacle Tint
Suspension and Brakes: Bilstein PSS9 coilovers, JBT BBK: 16" cross-drilled rotors, 8 piston and 15" cross-drilled rotors, 4 piston
Wheels: VIP Modular VR 02 20x9F, 20x10R | Toyo T1R 245/30/20F, 285/25/20R
Lights: PIAA 4150K Xtreme White Plus fog lights, AIB v3
MOST IMPORTANT: Hardwired V1; =)
ED Date: 4/7/05, Re-delivery date: 5/21/05
There are numerous dynos of aftermarket exhausts that caused power loss at RPi. The most infamous to date has been the Meistershaft exhaust for the M5. It caused a 30rwhp loss. The former owner of that exhaust is a member here and on M5board.
01-12-2009, 12:43 AM
#9
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My Ride: 545 SE Auto in Black
I have the Eisenmann quad back on mine seems to breath a lot better :-), they even havet he flap on them that the vacum hose pushes into. not cheap but I love it!
I think by adding the rpi scoop makes up for it