fhdfdfh [Archive] - E46Fanatics

Rob Levinson * UUC Motorwerks

11-19-2007, 04:02 PM

<img border="0" src="http://www.uucmotorwerks.com/images/UUC_logo_h.gif" width="450" height="24">
Great news for 330Xi and 325Xi 5-speed owners! 
 Confirmed! Our Stage2/M5 clutch conversion lightweight flywheel packages are 100% compatible with 5-speed Xi models. 
<blockquote>
<a href="http://www.uucmotorwerks.com/flywheel/select_gear_lfw.jpg" target="_blank"><img border="0" src="http://www.uucmotorwerks.com/flywheel/select_gear_lfw_small.jpg" align="right" width="223" height="169"></a>Ultimate throttle response and faster acceleration at your command... 
 UUC's unique "sprung hub" clutch design Stage2 lightweight flywheel has been named one of <a href="http://www.europeancarweb.com" target="_blank">European Car</a> magazine's "Top 10 Products" for 2003 in the E36 fitment.  Now the same technology is available for E46 and E39. 
Second-generation "Stage 2" technology now available for E46 and E39. Tipping the scales at only 8.5lbs, this aluminum flywheel boasts the same great features as our first-generation flywheel, but is designed to use the clutch disk, pressure plate, and throw-out bearing from the 3.6 liter E34 M5. 
Big news for E46 owners! 
 Many E46 owners (330, 328, 325, 323 models) have experienced mushy clutch feel, inconsistent engagement, and premature wear of the clutch in their manual-transmission cars.  The reason is quite simple - the original BMW (LUK-manufactured) clutch in the E46 (and E39) has a new "SAC" (Self Adjusting Clutch) design.  This new mechanism built into the clutch pressure plate is supposed to keep the clutch pedal engagement point the same as the clutch wears... but in all reality, it's a case of  "an answer to a question that nobody was asking." They have added a layer of complexity and feedback isolation, filling a need that didn't need filling - it is not too often that anybody notices that their clutch engagement point as moved 1/2" over 50K miles. The SAC mechanism itself causes problems; it over- or under-adjusts the pressure plate and therefore causes the clutch to slip or burn out prematurely. They are also known to shift, causing the pressure plate release fingers to slip off the plate, keeping 1/3 of the pressure plate engaged at all times. Bottom line is that the only fix is a complete clutch job, and your dealer is likely to claim "driver abuse". We have seen it happen too many times. 
 
The SAC mechanism may not give a clean release like a standard clutch. Instead of just two sets of springs, there is an adjuster mechanism that makes engagement feel mushy or slow.The M5 clutch conversion eliminates the SAC mechanism and restores traditional clutch feel with predictable and crisp engagement. 
This clutch has several advantages for the enthusiast driver: <ul>
<li>Maintaining the reliability and over-the-counter availability of a BMW factory part.<li class="text">Greater clamping force than standard 3-series clutch.<li class="text">Elimination of the SAC
mechanism.
<li class="text">Incorporates a sprung-hub design for quiet operation with a heavy-duty steel pressure plate.</li>
</ul>
The advantage of a sprung-hub clutch design is improved resistance (and in many cases, complete elimination) of the residual <a href="http://www.uucmotorwerks.com/flywheel/gear_rattle.htm" target="_blank">chattering noise</a> at idle that some lightweight flywheel-equipped cars can experience. Because BMW spec'd this clutch for use on the powerful S38-series engine in the M5, it is up to the task of handling the output from a modified M50-series (all '92-'05 6-cylinder 3-series and 6-cylinder 5-series) motor.  <div align="left"><table cellspacing="0" cellpadding="2" bgcolor="#000000" border="0"><tr><td><a href="http://www.sharked.com/supercharger.html" target="_blank"><img alt="European Car Shoot Small 0064.jpg (62106 bytes)" src="http://www.uucmotorwerks.com/flywheel/European_Car_Shoot_Small_0064_small.jpg" align="left" border="0" width="200" height="132"></a></td><td>UUC customers have been using the Stage 2 & M5 clutch setup in turbo or supercharged E36 M3s and MZ3s with fantastic results.  Our own testing has shown the M5 clutch to reliably handle in excess of 450hp. The UUC Stage 2 flywheel and clutch assembly has been used in the "test platform" M3 of Eurosport High Performance's supercharger development, reliably handling many miles and dyno runs in this powerful machine.</td></tr></table></div> The total weight of this clutch disk and pressure plate combo is greater than that of a standard E46 clutch, so we have reduced the flywheel weight to achieve an overall rotating mass that is almost identical to a standard 11.5lb lightweight flywheel and 3-series clutch combination. You can be assured not only of the performance increase you will experience,
but the long-term ease of ownership that comes with knowing a replacement clutch is never any further away than your dealer's parts counter. Now available - complete Stage 2 flywheel and clutch kits with choice of these clutch components: - OEM BMW M5 clutch kit - Performance Organic  (performance street/track organic) - UltraSmooth Cerametallic - (performance street / track / high power supercharger or turbocharger) - Multi-Puck Ceramic ( track, high power, and extreme drag-racing use) <a href="http://www.nexternal.com/uuc/?Target=products.asp&ProductID=285" target="_blank">click here for current pricing on these complete kits</a> All kits come complete with Stage 2 flywheel, pressure plate, clutch disk, and throwout bearing. Technical features:</blockquote><div align="center"><center><table cellspacing="0" cellpadding="4" border="0"><tr><td class="text_large" valign="top" align="right">applications:</td><td valign="center">330 5-speed, 328, 325, 323 (all i, Ci, ,Xi, iT variants) E46 6-cylinder models with 5-speed transmission (1999-2004). models with manual transmission only.</td></tr><tr><td class="text_large" valign="top" align="right">construction:</td><td valign="center">CNC machined 6061-T6 aluminum</td></tr><tr><td class="text_large" valign="top" align="right">dowel pin hole:</td><td valign="center">enlarged like factory-fit.</td></tr><tr><td class="text_large" valign="top" align="right">friction plate:</td><td valign="center">replaceable, 1050 steel.</td></tr><tr><td class="text_large" valign="top" align="right">balancing:</td><td valign="center">11,000rpm and spin-burst tested to 14,000rpm. SFI CERTIFIED</td></tr><tr><td class="text_large" valign="top" align="right">weight:</td><td valign="center">8.5 lb </td></tr><tr><td class="text_large" valign="top" align="right" bgcolor="#efefef">pressure plate, throwout bearing & clutch used:</td><td valign="center" bgcolor="#efefef">'91 - '93 E34 M5 parts required.   BMW part # 21 21 2 226 428 (complete clutch kit)</td></tr><tr><td class="text_large" valign="top" align="right">source:</td><td valign="center">Made in USA</td></tr><tr><td class="text_large" valign="top" align="right">price:</td><td valign="center">Available clutch components: - OEM BMW M5 clutch kit - UUC "Performance Organic" - UUC "UltraSmooth CeraMetallic" (extreme power/ drag racing) - UUC "Multi-Puck Ceramic" (extreme power / frequent drag racing) <a href="http://www.nexternal.com/uuc/?Target=products.asp&ProductID=285" target="main">click here for current pricing on these complete kits</a> All kits come complete with Stage 2 flywheel, pressure plate, clutch disk, and throwout bearing. </td></tr></table>Professional installation recommended. </center></div>