[s-cars] EDL Vs. Manual Diff Lock : FW; some stuff I ran into about the 2004 wrx-sti ( the 2003 isn't even out yet ! )

Stephen Redford shr42 at msn.com
Fri Jan 17 01:05:19 EST 2003

 I cut and pasted this , "specifications and features "  from http://impreza.subaru.com/microsites/impreza/wrxsti/wrxsti.jsp    This is obviously PR stuff , but it had the comments about the center / front and rear diff.'s which might interest the listers who had some interest in "Diff's." ...... Found one comment on another site which says that the rear diff on the 2003 WRX  is a  Viscous--Limited Slip Diff.  ...Again , it was PR stuff....  I haven't found any technicals yet............ Stephen Redford

300-horsepower @ 6,000 rpm, 300 lb.-ft. of torque @ 4,000 rpm
2.5-liter intercooled and turbocharged 4-cylinder boxer engine with Active Valve Control System (AVCS)
Full-time All-Wheel Drive (AWD) with Driver Controlled Center Differential (DCCD)
Mechanical limited-slip rear differential
Suretrac viscous limited slip front differential
4-wheel fully independent sport-tuned suspension with inverted struts
6-speed manual transmission with short-throw shifter
Subaru All-Wheel Driving System
Front seat side-impact air bags (SRS)*
Brembo braking system with 4-wheel disks
Super Sport Anti-lock Braking System (ABS) with Electronic Brake-force Distribution (EBD)
Front bumper corner spoilers, rear trunk spoiler, STi side ground effects
High Intensity Discharge (HID) headlights
17-inch BBS aluminum-alloy wheels with 225/45 R17 summer radials
Leather-wrapped STi MOMO brand steering wheel
Performance design reclining front bucket seats with integrated head restraints.
*The Supplemental Restraint System (SRS) (air bags) affords the driver and front passenger additional protection in a moderate-to-severe frontal or (when equipped with front seat side-impact air bags) a side-impact collision. This system provides supplemental protection only, and seatbelts must be worn in order to avoid injuries to out-of-position occupants upon bag deployment and to provide the best combined protection in a serious accident. Children should always be properly restrained in the rear seat.

Specifications on this site are based on the latest product information available at the time of publication. Some equipment shown in photography on this site is optional at extra cost. Specific options may be available only in combination with other options. Specific combinations of equipment or features may vary from time to time and by geographic area. Certain accessories and equipment may not be available at the time of publication. Subaru of America, Inc. reserves the right to change or discontinue at any time, without notice, prices, colors, materials, equipment, accessories, specifications, models and packages without incurring any obligation to make the same or similar changes on vehicles previously sold. Colors shown may vary due to reproduction and publication processes. Subaru, Impreza, WRX, STi, MOMO, "The Beauty of All-Wheel Drive" are registered trademarks.

----- Original Message -----
From: "Keith Maddock" <Keith.Maddock at trw.com>
To: <shr42 at msn.com>
Sent: Thursday, January 16, 2003 12:05 PM
Subject: Re: [s-cars] EDL Vs. Manual Diff Lock


Attached is the paper.  Save yourself a headache and first skip ahead to Section 4 on page 13, "Synergy: Torque Sensing + Traction Control Systems"  Section 4.3, "Torque Sensing + Brake TCS" is the applicable section for Torsen+EDL.


Keith Maddock, TRW Automotive,  Koblenz, Germany
Slip Control Systems, Systems Design, Traction Control
+49 (0)261/ 895 2474     -    -    keith.maddock at trw.com

>>> "Stephen Redford" <shr42 at msn.com> 21:05:58 16.01.2003 >>>
Thanks for the offer of the technical paper from ZexelTorsen .    I  would really like to read it. .........Stephen Redford  shr42 at msn.com
----- Original Message -----
From: "Keith Maddock" <Keith.Maddock at trw.com>
To: <s-car-list at audifans.com>; <jhull at cs.autometric.com>; <dohnal at hevanet.com>
Sent: Thursday, January 16, 2003 7:24 AM
Subject: Re: [s-cars] EDL Vs. Manual Diff Lock

> Great summary Wayne!
> Jeremy, my personal suggestion is to buy a 95.5 with EDL and then install a Torsen.
> A locker is the best  for ultimate traction but only usable in very specific circumstances.  In all other circumstances, you're stuck with a open diff.
> Both EDL and Torsen work all the time (S6 EDL cuts off above 40mph I have read), and the synergy you get with the combination of both is about as good as you could get for our cars.
> I have a good technical paper from the ZexelTorsen boys that describes well the benefits of Torsen with EDL, I can forward to anyone interested.
> Cheers,
> Keith "EDLBoy by day, TorsenBoyJunior by night" Maddock
> ****************************************************************
> Keith Maddock, TRW Automotive,  Koblenz, Germany
> Slip Control Systems, Systems Design, Traction Control
> +49 (0)261/ 895 2474     -    -    keith.maddock at trw.com
> >
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