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Thread: Engine Rebuild Advice

  1. #1
    Join Date
    Mar 2003
    Location
    Central NJ
    Posts
    759
    My Cars
    98' M3, 92' 850i

    Engine Rebuild Advice

    I figured this would be a good place to post this. I am rebuilding my M50 motor in my 325is. It has 230k miles on it's time for a makeover. I thought of the possibility of going F/I route but decided against that. Instead I'd like to put in high quality parts. If you have any suggestions, recommendations, or if there is anything that I am missing please let me know. Thanks

    M3 Cams w/software $1249
    M50 2.5 Wiseco 84.91mm Piston Set $699
    Ferrea Competition Big Valves $838.80
    Ferrea High Performance Valve Spring Set $480
    Ferrea Spring Seat Set $104.16
    Ferrea Titanium Retainer Set $383.04
    Arrow Connecting Rods $289.95
    M50 / M52 Multi Layered Steel Head Gasket $219.00
    ARP M50/M52/S50(US)/S52(US) Head Stud Kit $229.95

    TOTAL ~$4490
    1998 M3 | 1992 850i | 1993 325is (R.I.P)
    AA Track Pipe | Bilstein PSS9 | CDV Delete | X-Brace | AFE 3.5" | 540 HFM | Bimmerworld Silicone 3.5" TB Boot | Stainless Clutch/Brake Lines | UUC Slotted Rotors | Remus Exhaust | Xtec 6000k HID | 3-Spoke Steering Wheel Retrofit | UUC Clutch Stop | DLS UP35 | DLS A5 | DLS MW12 | Pioneer 880 |

  2. #2
    Join Date
    Apr 2004
    Location
    Houston
    Posts
    2,695
    My Cars
    1994 BMW 325i, 1996
    Just getting a slightly used M3 motor would cost about the same and get you a 3.2 or 3.0L 240hp motor with no science project required. Swap your M50 manifold over and it will be making another 15hp or so.

    or a 328 engine for $1000, swap your M50 manifold over, M3 cams and software and have about 250hp for half the price


    Quote Originally Posted by Calypso-325is
    I figured this would be a good place to post this. I am rebuilding my M50 motor in my 325is. It has 230k miles on it's time for a makeover. I thought of the possibility of going F/I route but decided against that. Instead I'd like to put in high quality parts. If you have any suggestions, recommendations, or if there is anything that I am missing please let me know. Thanks

    M3 Cams w/software $1249
    M50 2.5 Wiseco 84.91mm Piston Set $699
    Ferrea Competition Big Valves $838.80
    Ferrea High Performance Valve Spring Set $480
    Ferrea Spring Seat Set $104.16
    Ferrea Titanium Retainer Set $383.04
    Arrow Connecting Rods $289.95
    M50 / M52 Multi Layered Steel Head Gasket $219.00
    ARP M50/M52/S50(US)/S52(US) Head Stud Kit $229.95

    TOTAL ~$4490
    http://www.framesdirect.com/sunglasses/ - Sunglasses!
    1994 BMW 325i - GUTTED,
    AD shocks, eibach race springs, motorforce camberplates, stud conversion, and RTAB limiters, tunnel exauhst, CAI/chip, underdrive pullies, fan delete, AC delete, sparco race seats, 18x9 Superlegerras, GC swaybar, 2.8L engine with M50 intake manifold
    AND
    1996 BMW 328 - daily driver

  3. #3
    Join Date
    Jul 2002
    Location
    West Coast
    Posts
    1,299
    My Cars
    E36 M3 GrpN 3.0
    you can buy remfg'd BMW S50 or S52 for not much more....

    Quote Originally Posted by Calypso-325is
    I figured this would be a good place to post this. I am rebuilding my M50 motor in my 325is. It has 230k miles on it's time for a makeover. I thought of the possibility of going F/I route but decided against that. Instead I'd like to put in high quality parts. If you have any suggestions, recommendations, or if there is anything that I am missing please let me know. Thanks

    M3 Cams w/software $1249
    M50 2.5 Wiseco 84.91mm Piston Set $699
    Ferrea Competition Big Valves $838.80
    Ferrea High Performance Valve Spring Set $480
    Ferrea Spring Seat Set $104.16
    Ferrea Titanium Retainer Set $383.04
    Arrow Connecting Rods $289.95
    M50 / M52 Multi Layered Steel Head Gasket $219.00
    ARP M50/M52/S50(US)/S52(US) Head Stud Kit $229.95

    TOTAL ~$4490
    like2short
    E36 M3 3.0L Gruppe N
    E39 //M5 TiAg/Silverstone
    E53 X5 4.4

  4. #4
    Join Date
    Sep 2005
    Location
    NY/CT
    Posts
    125
    My Cars
    E36 M3 IP #94
    Quote Originally Posted by like2short
    you can buy remfg'd BMW S50 or S52 for not much more....
    Think that you have to multiply the con rod figure by 6 - Tony @ VAC Motorsports is a direct distributor + can give you a good deal on the rods.

  5. #5
    Join Date
    Aug 2004
    Location
    Albany, NY
    Posts
    652
    My Cars
    00 M5, 01 750iL
    Quote Originally Posted by jmott
    328 engine for $1000, swap your M50 manifold over, M3 cams and software and have about 250hp for half the price
    Is that what you have in your DSP car, Jack?

  6. #6
    Join Date
    Sep 2002
    Location
    MD
    Posts
    4,605
    My Cars
    BMW M3 LTW
    Quote Originally Posted by Calypso-325is
    I figured this would be a good place to post this. I am rebuilding my M50 motor in my 325is. It has 230k miles on it's time for a makeover. I thought of the possibility of going F/I route but decided against that. Instead I'd like to put in high quality parts. If you have any suggestions, recommendations, or if there is anything that I am missing please let me know. Thanks

    M3 Cams w/software $1249
    M50 2.5 Wiseco 84.91mm Piston Set $699
    Ferrea Competition Big Valves $838.80
    Ferrea High Performance Valve Spring Set $480
    Ferrea Spring Seat Set $104.16
    Ferrea Titanium Retainer Set $383.04
    Arrow Connecting Rods $289.95
    M50 / M52 Multi Layered Steel Head Gasket $219.00
    ARP M50/M52/S50(US)/S52(US) Head Stud Kit $229.95

    TOTAL ~$4490
    heck I could sell ya my schrick cams instead for cheaper than what u have up there for M3 cams...
    Sunir
    M3 LTW
    #22 HP

  7. #7
    Join Date
    Apr 2004
    Location
    Houston
    Posts
    2,695
    My Cars
    1994 BMW 325i, 1996
    Quote Originally Posted by Alex S
    Is that what you have in your DSP car, Jack?
    Nope, the cams would not be legal.
    http://www.framesdirect.com/sunglasses/ - Sunglasses!
    1994 BMW 325i - GUTTED,
    AD shocks, eibach race springs, motorforce camberplates, stud conversion, and RTAB limiters, tunnel exauhst, CAI/chip, underdrive pullies, fan delete, AC delete, sparco race seats, 18x9 Superlegerras, GC swaybar, 2.8L engine with M50 intake manifold
    AND
    1996 BMW 328 - daily driver

  8. #8
    Join Date
    Sep 2004
    Location
    Bucks County, Pa
    Posts
    4,100
    My Cars
    1995 M3, 1992 Saab 900, 2003 WRX
    Quote Originally Posted by jmott
    Just getting a slightly used M3 motor would cost about the same and get you a 3.2 or 3.0L 240hp motor with no science project required. Swap your M50 manifold over and it will be making another 15hp or so.

    or a 328 engine for $1000, swap your M50 manifold over, M3 cams and software and have about 250hp for half the price
    hmmm, you'd have to probly have pulleys and an intake also, and definitely software to hit those numbers, extra 1k.

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