Any tuner out there can upgrade our rear differential for better 0 to 130 timing?

Andym3100k · 09-12-2014, 05:14 AM

Hi Guys, anyone with any experience on our rear differential upgrading for better 0 to 130 timing? I believe we have our gear ratio at 3.15 & any chance we can replace with a 3.62 or something else to improve on the lower speed range for 1/4mile timing?

I know there will be more wheel spin n problem on low gear gripping but just wanted to explore to see whether anyone with similar experience even with the few older M model (E39, E60 M5)

Any advice will be appreciated, thanks.

Andy

Tylerstar · 09-14-2014, 04:49 PM

Can someone come out with a real tune so we can see some 1000whp M5's? LOL

M6-Coupe · 09-14-2014, 05:13 PM

Quote:

Originally Posted by Tylerstar

Can someone come out with a real tune so we can see some 1000whp M5's? LOL

greentrbo95gst · 09-14-2014, 05:35 PM

Why don't you maximize the potential of the car as is? What times are you trying to improve?
What did you hit 1/4 mile?

Andym3100k · 09-14-2014, 06:37 PM

Quote:

Originally Posted by greentrbo95gst

Why don't you maximize the potential of the car as is? What times are you trying to improve?
What did you hit 1/4 mile?

We always got drag race in our own group, just find that our car's power isn't as good after 4th gear. Maybe is bcos the other cars that we r racing has much bigger turbo (fully mod evo9 about 700whp) 1st to end of 3rd gear the M is still on par, after I enter into 4th gear the evo will slowly pull away. So looking for something higher differential eg maybe 3.91 to improve timing, any further advice guys??? Thanks

gmd2003 · 09-15-2014, 09:02 AM

Quote:

Originally Posted by Andym3100k

Quote:

Originally Posted by greentrbo95gst

Why don't you maximize the potential of the car as is? What times are you trying to improve?
What did you hit 1/4 mile?

We always got drag race in our own group, just find that our car's power isn't as good after 4th gear. Maybe is bcos the other cars that we r racing has much bigger turbo (fully mod evo9 about 700whp) 1st to end of 3rd gear the M is still on par, after I enter into 4th gear the evo will slowly pull away. So looking for something higher differential eg maybe 3.91 to improve timing, any further advice guys??? Thanks

Andy our ratio is already extremely short in first and second gear ( designed this way to minimize feeling of turbo lag ) . Adding an even shorter final drive would almost certainly make launching the car impossible and would mess up shift points. , kick down in auto , DSC function, e diff function etc . Our gear ratios are just fine , and the cars perform extremely well up top . We have two limitations preventing big hp . Lack of a true ECU tune and the size of our turbos ( mid size to reduce lag ). Can't fix the second problem without addressing the first .

PetrolFumes · 09-15-2014, 09:34 PM

Quote:

Originally Posted by gmd2003

Andy our ratio is already extremely short in first and second gear ( designed this way to minimize feeling of turbo lag ) . Adding an even shorter final drive would almost certainly make launching the car impossible and would mess up shift points. , kick down in auto , DSC function, e diff function etc . Our gear ratios are just fine , and the cars perform extremely well up top . We have two limitations preventing big hp . Lack of a true ECU tune and the size of our turbos ( mid size to reduce lag ). Can't fix the second problem without addressing the first .

Which i feel is almost a lost cause at this point

Tom C · 09-15-2014, 10:44 PM

Quote:

Originally Posted by gmd2003

Andy our ratio is already extremely short in first and second gear ( designed this way to minimize feeling of turbo lag ) . Adding an even shorter final drive would almost certainly make launching the car impossible and would mess up shift points. , kick down in auto , DSC function, e diff function etc . Our gear ratios are just fine , and the cars perform extremely well up top . We have two limitations preventing big hp . Lack of a true ECU tune and the size of our turbos ( mid size to reduce lag ). Can't fix the second problem without addressing the first .

+1

The only thing I would add is that changing the differential on a high tech toy like the M5 may also necessitate software updates. People changing the tires (drag radials) which isnt all that different tire height, still get weird error codes popping up. I would imagine the DCT software may not respond well to the change in hardware.

Andym3100k · 09-15-2014, 11:36 PM

Quote:

Originally Posted by gmd2003

Andy our ratio is already extremely short in first and second gear ( designed this way to minimize feeling of turbo lag ) . Adding an even shorter final drive would almost certainly make launching the car impossible and would mess up shift points. , kick down in auto , DSC function, e diff function etc . Our gear ratios are just fine , and the cars perform extremely well up top . We have two limitations preventing big hp . Lack of a true ECU tune and the size of our turbos ( mid size to reduce lag ). Can't fix the second problem without addressing the first .

Alright noted on that, may have to look out on other mod option. Btw my friend C63 fully mod Black Series has a upgraded rear differential with very good 4th to 5th n 6th gear pull against my M6. With the upgrade he would change gear early compare with my M6 & can feel his upper gear getting stronger against our car.

Used2be · 09-16-2014, 07:36 AM

Quote:

Originally Posted by Andym3100k

Btw my friend C63 fully mod Black Series has a upgraded rear differential with very good 4th to 5th n 6th gear pull against my M6. With the upgrade he would change gear early compare with my M6 & can feel his upper gear getting stronger against our car.

I agree completely with gmd2003. The final drive gearing in the differential will not change the pull of the motor in the upper gears, that is all motor and the way it makes power. Look at the gearing of our DCT with our differential gearing versus your friend's C63 trans and diff gearing. Perhaps the transmission gearing of the Mercedes allows him that enhanced pull from 4th on? The differential gearing wouldn't do it.

shahano · 09-16-2014, 08:57 AM

maybe you can change gear ratio for 4th 5th and 6th only. that would be the best option.

Andym3100k · 09-16-2014, 09:00 AM

Quote:

Originally Posted by shahano

maybe you can change gear ratio for 4th 5th and 6th only. that would be the best option.

U sure? How to do it n who can do it? Anyone any idea?

M-bitious · 09-16-2014, 09:41 AM

Turner Motorsport might be able to help you there

URBAN LEGEND · 09-16-2014, 10:06 AM

I think it's time to throw in towel for this car. There will be no real tunes coming no time soon.

Andym3100k · 09-16-2014, 10:32 AM

Quote:

Originally Posted by M-bitious

Turner Motorsport might be able to help you there

I have gone through their website, nothing for our engine.

Andym3100k · 09-16-2014, 10:34 AM

Quote:

Originally Posted by URBAN LEGEND

I think it's time to throw in towel for this car. There will be no real tunes coming no time soon.

I thought LEIB has creak it n now they hv already start tuning M-bitious car.

shahano · 09-16-2014, 01:34 PM

Quote:

Originally Posted by Andym3100k

U sure? How to do it n who can do it? Anyone any idea?

Each gear has an individual ratio, you could open up the gearbox and just change the ratio of the those 3 gears. You can find the current ratio of each gear online, and then change it slightly to have a shorter gear.

Andym3100k · 09-20-2014, 05:46 PM

[QUOTE=shahano;16642762]Each gear has an individual ratio, you could open up the gearbox and just change the ratio of the those 3 gears. You can find the current ratio of each gear online, and then change it slightly to have a shorter gear.[/

Thanks for the info, do u think by replacing the gear do we need to reprogram the software of the DCT?

09-12-2014, 05:14 AM	#1
Andym3100k Captain 110 Rep 611 Posts Drives: 2014 M6 GC FULL HAMMAN WIDE BO Join Date: Apr 2013 Location: Singapore iTrader: (0)	Any tuner out there can upgrade our rear differential for better 0 to 130 timing? Hi Guys, anyone with any experience on our rear differential upgrading for better 0 to 130 timing? I believe we have our gear ratio at 3.15 & any chance we can replace with a 3.62 or something else to improve on the lower speed range for 1/4mile timing? I know there will be more wheel spin n problem on low gear gripping but just wanted to explore to see whether anyone with similar experience even with the few older M model (E39, E60 M5) Any advice will be appreciated, thanks. Andy __________________ 2014 M6 GRAN COUPE FULL HAMANN WIDEBODY. BR TUNE STACK ON BMS JB4 BCM METH/ UPGRADE SNAIL,ZEX 100 WET SHOT, CUSTOM COLD AIR INTAKE SS DP/ FULL ARKA SYSTEM/ CHARGE PIPE TWIN NOZZ METH/NOS.BC 19" RIMS NT05R 345/30/19
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09-14-2014, 04:49 PM	#2
Tylerstar Captain 69 Rep 961 Posts Drives: Straight Piped F10 M5, GTR Join Date: Oct 2009 Location: Miami iTrader: (0)	Can someone come out with a real tune so we can see some 1000whp M5's? LOL
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09-14-2014, 05:35 PM	#4
greentrbo95gst Brigadier General 1231 Rep 4,106 Posts Drives: 21 M5 Comp Join Date: Jan 2011 Location: Orange County iTrader: (6)	Why don't you maximize the potential of the car as is? What times are you trying to improve? What did you hit 1/4 mile? __________________ Current: 21 M5 Comp, 17 X5M, 06 M3, 14 Ferrari FF, Tesla Model S Performance.
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09-16-2014, 08:57 AM	#11
shahano Lieutenant Colonel 231 Rep 1,576 Posts Drives: 21' M2C 6spd ,11' 1M, 88' M3 Join Date: Oct 2013 Location: London, UK iTrader: (0)	maybe you can change gear ratio for 4th 5th and 6th only. that would be the best option.
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09-16-2014, 09:41 AM	#13
M-bitious Lieutenant 83 Rep 411 Posts Drives: BMW M2 Join Date: Feb 2007 Location: Amsterdam iTrader: (0)	Turner Motorsport might be able to help you there
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09-16-2014, 10:06 AM	#14
URBAN LEGEND Rocky 412 Rep 3,085 Posts Drives: 16 M5, 18 ZL1 1LE, 18 M3 Join Date: Feb 2009 Location: Brenham TX iTrader: (0)	I think it's time to throw in towel for this car. There will be no real tunes coming no time soon.
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09-20-2014, 05:46 PM	#18
Andym3100k Captain 110 Rep 611 Posts Drives: 2014 M6 GC FULL HAMMAN WIDE BO Join Date: Apr 2013 Location: Singapore iTrader: (0)	[QUOTE=shahano;16642762]Each gear has an individual ratio, you could open up the gearbox and just change the ratio of the those 3 gears. You can find the current ratio of each gear online, and then change it slightly to have a shorter gear.[/ Thanks for the info, do u think by replacing the gear do we need to reprogram the software of the DCT?
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