Hair's breadth from pulling the trigger on the Stasis diff mod - engineer types please comment.....

markbradford · 04-06-2002, 06:24 PM

From Stasis

Differential Tuning

Tuning the center differential provides one of the most significant performance gains available to the Quattro owner. The standard torsen center differential in the S4 and A4 provides a 2:1 torque distribution capability. This enables the end of the car with traction (generally the rear) to deliver twice the torque being delivered by the least tractive end of the vehicle (generally the front). For high performance street cars, we recommend a bias ratio of 4:1. This is the same bias ratio that Audi has provided in the stock RS4 driveline.

In professional competition a high bias center differential provided a performance gain of almost 2 seconds a lap. This is the equivalent of adding 60hp to an S4. This is our first step in almost every tuning project. It provides a measurable performance gain for track-oriented drivers. For the enthusiast street driver in good weather conditions, it can provide the balance and control of a rear wheel drive vehicle, as 80% of the cars power will be applied to the rear wheels upon corner exit.

The center differential in an S4 is a slip in cartridge accessible from the rear of the transmission. The A4 center differential is a self-contained bolt on unit. Install time is approximately 2 hours.

Center Differential rebuild A4/S4 - $500

Please comment on reliiability, performance, etc.

Thanks!

[ej257] · 04-06-2002, 06:32 PM

give me that mod money.

no clue as to your real question though...

BOOSTD · 04-06-2002, 06:37 PM

dingster · 04-06-2002, 06:37 PM

Suspension, alighment, tires will make more of a difference. IMHO you won't see a difference on a center diff mod unless you drive 9/10th on a track or you're competing. The above will give you more significant improvements for the same price.

djnelsen · 04-06-2002, 06:52 PM

SameerP · 04-06-2002, 07:30 PM

Lambo-Bully · 04-06-2002, 07:31 PM

will let y'all know, someday, when I get around to it....

THis will also give a 4:11/1 final drive ratio compared to the 3:89/1 in the 5 speeds

markbradford · 04-06-2002, 07:31 PM

All done.

"IMHO you won't see a difference on a center diff mod unless you drive 9/10th on a track or you're competing. "

I drive at 9.9/10 on the track, and I compete. =)

Yippers® · 04-06-2002, 07:33 PM

dingster · 04-06-2002, 07:33 PM

Seriously race tires, and more aggressive alignment(more neg camber, toe) will get you a lot more out of the car.

04-06-2002, 06:24 PM	#1
markbradford Member Account #: 129 Join Date: Mar 2000 Location: Chicago Posts: 37,587	Hair's breadth from pulling the trigger on the Stasis diff mod - engineer types please comment..... From Stasis Differential Tuning Tuning the center differential provides one of the most significant performance gains available to the Quattro owner. The standard torsen center differential in the S4 and A4 provides a 2:1 torque distribution capability. This enables the end of the car with traction (generally the rear) to deliver twice the torque being delivered by the least tractive end of the vehicle (generally the front). For high performance street cars, we recommend a bias ratio of 4:1. This is the same bias ratio that Audi has provided in the stock RS4 driveline. In professional competition a high bias center differential provided a performance gain of almost 2 seconds a lap. This is the equivalent of adding 60hp to an S4. This is our first step in almost every tuning project. It provides a measurable performance gain for track-oriented drivers. For the enthusiast street driver in good weather conditions, it can provide the balance and control of a rear wheel drive vehicle, as 80% of the cars power will be applied to the rear wheels upon corner exit. The center differential in an S4 is a slip in cartridge accessible from the rear of the transmission. The A4 center differential is a self-contained bolt on unit. Install time is approximately 2 hours. Center Differential rebuild A4/S4 - $500 Please comment on reliiability, performance, etc. Thanks!

04-06-2002, 06:32 PM	#2
[ej257] Member Account #: 11725 Join Date: Oct 2000 Posts: 34,980	dont do it give me that mod money. no clue as to your real question though... __________________

04-06-2002, 06:37 PM	#3
BOOSTD Elder Member Account #: 6443 Join Date: Jun 2000 Posts: 28,116	been thinking about that myself __________________ Please read.

04-06-2002, 06:37 PM	#4
dingster Member Account #: 776 Join Date: Mar 2000 Posts: 3,349	Spend that money on better suspension first. More bang for the buck. Suspension, alighment, tires will make more of a difference. IMHO you won't see a difference on a center diff mod unless you drive 9/10th on a track or you're competing. The above will give you more significant improvements for the same price. __________________

04-06-2002, 06:52 PM	#5
djnelsen Elder Member Account #: 13802 Join Date: Dec 2000 Posts: 14,829	drooll..... __________________ 2002 Audiworld A4 B5 Forum PostWhore Grand Champion my mod reviews

04-06-2002, 07:30 PM	#6
SameerP Elder Member Account #: 1204 Join Date: Mar 2000 Posts: 13,063	Well he does have the glorious Hypercoil/Blilstein setup... __________________

04-06-2002, 07:31 PM	#7
Lambo-Bully Junior Member Account #: 21967 Join Date: Jul 2001 Posts: 1,078	I'll get the same result from installing an S4 6 speed, right? ;-) will let y'all know, someday, when I get around to it.... THis will also give a 4:11/1 final drive ratio compared to the 3:89/1 in the 5 speeds __________________ Soon to be "The mechanic formerly known as 'Mat@4induktion'" Email me at audigeek@hotmail.com AIM: MatJReid In the stable...... '05.5 S4, modded with GIAC!, 30% tint, RNS-E, RS4 front grill, APR snub mount, TPMS system, MY07 front caliper springs. ;-P '98 Dodge neon 5 speed. 45 MPG!!! Daughter's car when she turns 14 & gets her permit. Pulling autocross duty until she takes over. :-D '03 R1, MIG dual undertail exhaust, flush mount front blinkers, K&N, racing intake....when nothing else is fast enough - - FOR SALE, $6000!!! SOLD!!! for $6800, on May 16 2008. All you haters that said it was worth less.....pfft!

04-06-2002, 07:31 PM	#8
markbradford Member Account #: 129 Join Date: Mar 2000 Location: Chicago Posts: 37,587	"Suspension, alighment, tires will make more of a difference. " CHECK! All done. "IMHO you won't see a difference on a center diff mod unless you drive 9/10th on a track or you're competing. " I drive at 9.9/10 on the track, and I compete. =)

04-06-2002, 07:33 PM	#9
Yippers® Member Account #: 19399 Join Date: May 2001 Posts: 17,328	Dan, what's your feeling on the impacts in street driving in the real world? __________________

04-06-2002, 07:33 PM	#10
dingster Member Account #: 776 Join Date: Mar 2000 Posts: 3,349	I'm talking about real alignment, susp, tires =P Seriously race tires, and more aggressive alignment(more neg camber, toe) will get you a lot more out of the car. __________________

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