Differential mods for 545i / 550i
#41
Contributors
Join Date: Apr 2005
Location: San Diego, CA
Posts: 7,363
Likes: 0
Received 0 Likes
on
0 Posts
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
![Default](https://5series.net/forums/images/icons/icon1.gif)
Originally Posted by houbmw' post='294066' date='Jun 7 2006, 03:48 PM
is this also available for the 2007 530i with SMG???? Who much would installation cost, approximately, and would it void our warranties? Ive already bout some mods and I still dont have my car yet, haha
Contact Koala Motorsport: http://www.koalamotorsport.com/contact.asp. They may just have a 530 differential for you. I bet all it is is a swap from a 530 Step with a final drive ratio of 3.64.
#42
Senior Members
Thread Starter
Join Date: Apr 2006
Location: Huntington Beach, CA
Posts: 755
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2007 550i, Black Sapphire, SMG, M-Aerokit, Sports Package, Comfort Access, Logic 7,
![Default](https://5series.net/forums/images/icons/icon1.gif)
Originally Posted by jiio' post='294072' date='Jun 7 2006, 05:57 PM
$1500 is just for the differential and shipping from Ohio. Installation is separate. I have a guy in mind already in San Diego to do the install.
![Devil](https://5series.net/forums/images/smilies/imported/devil.gif)
#43
Contributors
Join Date: Aug 2005
Location: Austin TX
Posts: 6,554
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2014 X5 xDrive 5.0 M Package Carbon Black Metallic/2008 M Roadster Imola Red
![Default](https://5series.net/forums/images/icons/icon1.gif)
Originally Posted by houbmw' post='294066' date='Jun 7 2006, 05:48 PM
is this also available for the 2007 530i with SMG???? Who much would installation cost, approximately, and would it void our warranties? Ive already bout some mods and I still dont have my car yet, haha
To deny a warranty claim, all BMW has to do is to assert that an after-market part caused the problem with the OEM part--whether it did or not. BMW, like many manufacturers, is very adroit at arguing that problems with OEM parts are caused by after-market parts. Thus, I would not want to be in the position of having to take BMW to court to force the company to "prove" its point.
So, I won't install an after-market part that might be argued somewhat reasonably to have caused the failure of a BMW part unless the after-market manufacturer provides a warranty on the part and any BMW part that may fail because of the part (e.g., Dinan). Even then, one can get caught in the middle.
#44
Contributors
Join Date: Aug 2005
Location: Austin TX
Posts: 6,554
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2014 X5 xDrive 5.0 M Package Carbon Black Metallic/2008 M Roadster Imola Red
![Default](https://5series.net/forums/images/icons/icon1.gif)
Originally Posted by jiio' post='294053' date='Jun 7 2006, 05:29 PM
Hollywood,
You and I should try to get some other folks for a group buy![Tongue](https://5series.net/forums/images/smilies/imported/tongue.gif)
I don't know if I want to pay Dinan's overinflated price of $2K. Koala Motorosport is selling differentials for $1500 and you get a choice of the different final drive ratios. Dinan only offers 3.45. I think I'm going to go with either 3.91 or 3.64 from Koala. Thanks for the info Znod and choi000!
You and I should try to get some other folks for a group buy
![Tongue](https://5series.net/forums/images/smilies/imported/tongue.gif)
I don't know if I want to pay Dinan's overinflated price of $2K. Koala Motorosport is selling differentials for $1500 and you get a choice of the different final drive ratios. Dinan only offers 3.45. I think I'm going to go with either 3.91 or 3.64 from Koala. Thanks for the info Znod and choi000!
#45
Senior Members
Thread Starter
Join Date: Apr 2006
Location: Huntington Beach, CA
Posts: 755
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2007 550i, Black Sapphire, SMG, M-Aerokit, Sports Package, Comfort Access, Logic 7,
![Default](https://5series.net/forums/images/icons/icon1.gif)
Originally Posted by Znod' post='294085' date='Jun 7 2006, 06:12 PM
You are welcome. Happy down gearing.
#46
Contributors
Join Date: Aug 2005
Location: Austin TX
Posts: 6,554
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2014 X5 xDrive 5.0 M Package Carbon Black Metallic/2008 M Roadster Imola Red
![Default](https://5series.net/forums/images/icons/icon1.gif)
Originally Posted by hollywoodtrash' post='294176' date='Jun 7 2006, 08:48 PM
Hey Z, do you think the differential will shave off at least .5 seconds on the zero to sixty?
![Thumbsup](https://5series.net/forums/images/smilies/imported/thumbsup.gif)
#47
Senior Members
Thread Starter
Join Date: Apr 2006
Location: Huntington Beach, CA
Posts: 755
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2007 550i, Black Sapphire, SMG, M-Aerokit, Sports Package, Comfort Access, Logic 7,
![Default](https://5series.net/forums/images/icons/icon1.gif)
Originally Posted by Znod' post='294185' date='Jun 7 2006, 09:10 PM
I really do think so--even going 3.48 to 3.91. That's 12.4% more RW torque. Let's say that means 12% more RWHP--.124 X 250 (max) = 40.92 more equivalent RWHP for a 545i. Assuming a 20% loss in efficiency between the flywheel and the ground, that means 40.92 / .8 = 51.15 more equivalent FWHP--which yields a total of 51.15 + 330 = 381.15 equivalent FWHP for a 545i. Then, using the standard rule of thumb that 10 extra FWHP means a .1 quicker ET we get an ET improvement of 51.15 / 10 / 10 = .5115 sec quicker ET. ![Thumbsup](https://5series.net/forums/images/smilies/imported/thumbsup.gif)
![Thumbsup](https://5series.net/forums/images/smilies/imported/thumbsup.gif)
![W00t](https://5series.net/forums/images/smilies/imported/w00t.gif)
![Tongue](https://5series.net/forums/images/smilies/imported/tongue.gif)
![Tongue](https://5series.net/forums/images/smilies/imported/tongue.gif)
#48
Contributors
Join Date: Apr 2005
Location: San Diego, CA
Posts: 7,363
Likes: 0
Received 0 Likes
on
0 Posts
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
![Default](https://5series.net/forums/images/icons/icon1.gif)
It's gonna be the best $2K spend so far on my precious. I'm going to make the call to Koala tomorrow and give them my business then call the guy in San Diego to set up a schedule for the install.
Hollywood,
I'm gonna tear you up!
That is until you get yours done. :'(
Hollywood,
I'm gonna tear you up!
![Tongue](https://5series.net/forums/images/smilies/imported/tongue.gif)
#49
Senior Members
Thread Starter
Join Date: Apr 2006
Location: Huntington Beach, CA
Posts: 755
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2007 550i, Black Sapphire, SMG, M-Aerokit, Sports Package, Comfort Access, Logic 7,
![Default](https://5series.net/forums/images/icons/icon1.gif)
Originally Posted by jiio' post='294216' date='Jun 7 2006, 10:04 PM
It's gonna be the best $2K spend so far on my precious. I'm going to make the call to Koala tomorrow and give them my business then call the guy in San Diego to set up a schedule for the install.
Hollywood,
I'm gonna tear you up!
That is until you get yours done. :'(
Hollywood,
I'm gonna tear you up!
![Tongue](https://5series.net/forums/images/smilies/imported/tongue.gif)
![Worthy](https://5series.net/forums/images/smilies/imported/worthy.gif)