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Thread: m52 Turbo Build

  1. #1326
    Join Date
    Oct 2004
    Location
    DeWitt, Michigan
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    4,800
    My Cars
    '97 540i/6, '97 328i
    But how is the smoking now? That was why you vented the drain line, right? It's a concept just like a vented drain pipe in a house I guess. I never thought of applying it to a car.

    As far as the welded diff, it's totally a personal preference thing. I got totally used to it now (doesn't mean I don't notice it, just that it doesn't bother me at all), and I've gotten to the point where I really enjoy the 100% predictability of it. My dad (who is 70) and I were goofing around with the car one day including "off roading" with it lol. After we were done he had me weld the diff in his beater truck that he drives around and gathers fire wood with, etc. He's 100% happy with it.

    So anyway, it's not for everyone, but it can be super awesome. I should disclose though that I spent years racing sprint karts, so I have a special affinity for the "no differential" life. Haha

    - - - Updated - - -

    Quote Originally Posted by pbonsalb View Post
    Are you still on a stock 328i auto trans? If so, that will fail soon with the torque you have even at 7 psi.
    I can vouch for that IF you shift with boost. It turns out that the 4L30e can handle a decent amount of abuse if you don't shift in boost, and don't try to put too much torque through 3rd gear.

  2. #1327
    Join Date
    Feb 2011
    Location
    Virginia
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    2,232
    My Cars
    97' m52 turbo
    Quote Originally Posted by pbonsalb View Post
    I don't think you are running 3.5-4.0 to 60 on street tires with 7 psi and a stock M3 diff. The hardest part of driving these cars fast is hooking up off the line. I figure that my 11.5 second quarters at 130+ are about 3.5-4 seconds to 60. The slip does not say but it does give 1/8 and I am usually in the mid to high 7s at just over 100 so I figure 3.5 to 60 and another 4.0 60-100.

    Are you still on a stock 328i auto trans? If so, that will fail soon with the torque you have even at 7 psi.
    Let me know what you think, I tried trimming the video to start from 0 mph but it looks like I got from 10mph to about 70. And I didn't ring 1st gear all the way either. The car is hitting 10-11 PSI due to boost creep when high the power band. Also keep in mind the car is basically gutted, no carpet, panels, light weight seats, no softop or frame, no hood, No bumper supports, no spare, etc... No Auto, its the ZF with a stage 3 clutch and chromoly flywheel. Style 32's wheels with 245 45 17's all around

    If you look at the seek bar at the bottom of the video im going 70 by the 4th second the entire video is 6 seconds long:

    Last edited by 328iFun; Today at 09:46 AM.

  3. #1328
    Join Date
    Feb 2011
    Location
    Virginia
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    2,232
    My Cars
    97' m52 turbo
    If the video doesn't do justice, I know I could take this car out this evening and get it to runn 0-60 in 3.5-4 seconds with a better video. About 99% confident.

    The car really lights up in redline, I wasn't expect it all. I was thinking she was going to be wore out by 6,000. Maybe the S52 cams helped?
    Last edited by 328iFun; Today at 09:48 AM.

  4. #1329
    Join Date
    Oct 2004
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    DeWitt, Michigan
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    '97 540i/6, '97 328i
    Quote Originally Posted by tptrsn View Post
    But how is the smoking now? That was why you vented the drain line, right?
    I'm very curious about this. I may try it on my E36 that I am draining to the drainplug but from a top mount. Super cheap China turbo in my case that may just be shot already, but kind of doubt it, I think more likely I have issues with my drain setup. I was going to pull the pan and weld in a conventional drain setup, but I always like to try stuff if there is a reason to.

  5. #1330
    Join Date
    Feb 2011
    Location
    Virginia
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    2,232
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    97' m52 turbo
    Quote Originally Posted by tptrsn View Post
    I'm very curious about this. I may try it on my E36 that I am draining to the drainplug but from a top mount. Super cheap China turbo in my case that may just be shot already, but kind of doubt it, I think more likely I have issues with my drain setup. I was going to pull the pan and weld in a conventional drain setup, but I always like to try stuff if there is a reason to.
    Car is not smoking. Yes, Drain.

  6. #1331
    Join Date
    Jun 2005
    Location
    Concord, NH
    Posts
    20,047
    My Cars
    08 E90M3; 99 E36M3 Turbo
    You are timing so maybe it is that quick. I am definitely surprised you are doing that well on street tires. Based on my track times, I figured I am that quick on drag radials with 50% more rwhp.
    Last edited by pbonsalb; Today at 10:14 AM.

  7. #1332
    Join Date
    Feb 2011
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    Virginia
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    97' m52 turbo
    Quote Originally Posted by pbonsalb View Post
    You are timing so maybe it is that quick. I am definitely surprised you are doing that well on street tires. Based on my track times, I figured I am that quick on drag radials with 50% more rwhp.
    I agree,

    It really doesn't make much sense to me either. I knew the .58 AR would spool up quick but I really thought it'd be done at 90+ or at red line - but that's not the case.

    This is with a 2.5" down-pipe as well, not too shabby. Like I said 12+ psi is going to be pretty crazy. car starts building boost right around or a little bit before 3,000 rpms

    I think I may have to install a stiffer spring as I've tried turning it up but it doesn't increase probably due to back pressure opening the wastegate
    Last edited by 328iFun; Today at 10:30 AM.

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