Materials to Maintain Your ZHP IIIII Hand Protection IIIII Tools to Maintain Your ZHP
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  1. #21
    Join Date
    Apr 2018
    Location
    Waco, TX
    Posts
    117
    Reasoned, did you ever swap this LSD in? What are your thoughts? I have a 3.07 Performance Gearing LSD in my car and have considered going to a 3.46 for my twin screw 3 car.

  2. #22
    Join Date
    Oct 2016
    Location
    Vermont
    Posts
    588
    I did, I did... it doesn't factor into my driving much but, even with the DSC on, it doesn't kick on nearly as much, I'm better able to control the traction myself at launch, and when it does flash on, it doesn't seem to kill the power like it did--as if it's only warning me it's thinking about engaging. I leave the DSC on, as a result, and it's made my driving experience MUCH more fun! Furthermore, I was worried I'd wind up with some clunking, which is common I gather, but it's smooth as silk, so I am one happy camper with my MFactory 3.38 helical LSD.

    By the way, I now I have two spare open diffs on the shelf (a 3.07 and a 3.38). I'm thinking I might find a nice, higher mileage 330i for my next DD that would benefit nicely from the 3.38.

    As for your twin screw situation, I'm not qualified to offer an opinion, but I've read multiple reports online that say the 3.07 is ideal for superchargers (I would bet even more so for a twin screw with extra low-end torque).
    2004 BMW 330i ZHP (52k miles), Jet Black with black leather, MFactory LSD (3.38) with Z4 cover, 18"x8.5" ET38 APEX Arc-8's (Anthracite) with 245/40 Michelin PSS', Koni Sports with factory springs and front and rear reinforcement plates, Shark Injector, Corsa TSE3 cat-back exhaust, TMS under-driven pulleys (water & steering), CDV delete, TMS CF strut brace, K&N CAI, GAS DISA rebuild, TMS pedals, Wheelskins steering wheel cover, roller tray center console, black-out grilles, and WeatherTech mats

  3. #23
    Join Date
    May 2011
    Location
    Charleston SC
    Posts
    6,149
    I'm running a 3.15 with a twin screw... pretty much perfect. I wouldn't go much higher than a 3.38 with FI. My wife was running a 3.08 in her highly modified 135 and she was running in the 12s at the local drag strip... and that was pretty much spinning in 1st gear
    Dinan CAI &Throttle body, ESS Tuning TS2, Bimmerbrakes gen3 headers, UUC SSK & DSSR. Achilles oil pump, VAC oil pan baffle
    M3 Motor mounts, UUC Trans mounts, Modified clutch style LSD 3.15, TMS front subframe reinforcement, Koni Yellow sports,
    H&R sport springs,
    UUC sway bars, BMW Perf. Rotors, UUC SS brake lines, Hawk HPS pads, CSL replica wheels,
    Rotora strut bar, FXR HID conversion, M3 Mirror conversion, BSW stage 1 speakers

  4. #24
    Join Date
    May 2011
    Location
    Jacksonville, Florida
    Posts
    2,202
    Quote Originally Posted by Sockethead View Post
    I'm running a 3.15 with a twin screw... pretty much perfect. I wouldn't go much higher than a 3.38 with FI. My wife was running a 3.08 in her highly modified 135 and she was running in the 12s at the local drag strip... and that was pretty much spinning in 1st gear
    Is 3.08 is still stock gearing on the 135 diff?

    Sent from my Nexus 5X using Tapatalk
    2005 Jet Black 6MT ZHP "Family First"
    ~Rob~

  5. #25
    Join Date
    May 2011
    Location
    Charleston SC
    Posts
    6,149
    Yes, that is the stock ratio. On the newer BMWs, the ring gear is welded to the differential unit. She to took the car to VAC Motorsports. They cut off the ring gear and re-machine all the parts for bolts then installed the LSD unit. I didn't touch that one
    Dinan CAI &Throttle body, ESS Tuning TS2, Bimmerbrakes gen3 headers, UUC SSK & DSSR. Achilles oil pump, VAC oil pan baffle
    M3 Motor mounts, UUC Trans mounts, Modified clutch style LSD 3.15, TMS front subframe reinforcement, Koni Yellow sports,
    H&R sport springs,
    UUC sway bars, BMW Perf. Rotors, UUC SS brake lines, Hawk HPS pads, CSL replica wheels,
    Rotora strut bar, FXR HID conversion, M3 Mirror conversion, BSW stage 1 speakers

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