M50, M50tu, S50, M52 & S52 Engines

M50 Non-Vanos: (325i/525i ‘91-92),
M50tu: (325i/525i ‘93-95), S50: (M3 ‘95)
M52: (328i/528i ‘96-’97), S52: (M3 ‘96-99)- 6 Cyl DOHC
Engine SeriesHorsepowerPriceCore Deposit
3200 Sport OBD I or II275 HP$10,495$2,000-3,500
3200 Rally OBD I or II 280-305 HP$12,995$2,000-3,500
3300 Rally OBD I or II295-315 HP$14,995$2,000-3,500
3200 Forced Induction OBD I or II 375 - 500 HP$13,995$2,000-3,500

* Includes Intake Cam ONLY

3200 Sport OBDI or OBDII Engine: M50/M50tu/S50/S52   A replacement to a M3 (S52) engine with some attitude.If your a BMW driving enthusiast who wants a moderate increase in power and greater engine longevity, without sacrificing fuel economy at a cost effective price, this engine fills the bill.

The MM 3200 Sport offers the following advantages over a stock engine:

  1. Increase in displacement and compression for more torque.
  2. Improved head flow and stronger valve retainers.
  3. Surface Turbulence valves to prevent head cracking and increase fuel economy.
  4. Stronger yet lighter forge Alusil pistons and pins.
  5. Special coated Tri-Metal.
  6. Rebuilt “blueprinted” VANOS unit.

Options usually purchased with this engine are:

  1. Oil pan swing to prevent oil starvation under hard cornering.
  2. MM lightened 240mm flywheel and clutch assembly.
  3. MM EPROM chip upgrade.

3200 Rally OBDI or OBDII Engine: M50/M50tu/S50/S52   The most popular power plant we sell in this engine series. This dual purpose engine lends it’s self well to enthusiastic driving on the street or track. It has a broad power band, pulls good down in the lower rpm range all the way it’s 7700rpm redline. The reciprocating mass is not only a good bite lighter but much stronger then the pistons, pins, rods, and rod bearings used In a E36 (S52) engine. This increase reliability and allows the engine to “spool up” more quickly. In an E36 will run the the1/4 mile in about 13.5 seconds at 108 mph.

The MM 3200 Rally provides these advantages over a stock engine:

  1. Chrome Moly steel crankshaft 89.6mm stroke
  2. Stronger but lighter 87mm forged alusil pistons with lighter 22mm tapered wall wrist pins.
  3. Premium light weight Crome Moly forged “H” beam rods.
  4. Coated trimetal rod bearings.
  5. Hotter rally intake and exhaust cams, with special ovate beehive valve springs and retainers.
  6. Higher flowing head, with lighter valve train, and surface turbulence valves.
  7. Windage tray and swing gate to prevent oil starvation under hard cornering.
  8. Rebuilt blueprinted VANOS unit.

Options usually purchased with this engine are:

  1. Light weight 240mm flywheel and clutch assembly
  2. MM EPROM chip and larger injectors
3300 Rally OBDI or OBDII Engine: M50/M50tu/S50/S52   If you are looking for the biggest most powerful street/ track engine we offer in a normally aspirated engine – this is it! The heart of this engine is a 93mm stroked S54 Crome Moly forged steel crankshaft coupled to a light but strong reciprocating mass (pistons, pins, rods, and rod bearings). The lighter but stronger reciprocating mass not only adds life to the engine but helps it “spool up” quicker. This engine has a wide power band, it pulls down low but can rev to 7700rpm. This engine when coupled to our light weight 240mm flywheel and clutch assembly works well with the stock drive train. In a E36 it will do about 110mph in the 1/4 mile in 13 seconds.
Added advantages are:
  1. Longer 93mm stroke Crome Moly steel crankshaft for more torque and larger displacement.
  2. Stronger but lighter 87mm forged alusil pistons with lighter 22mm tapered wall wrist pins.
  3. Premium light weight Crome Moly forged “H” beam rods.
  4. Coated trimetal rod bearings.
  5. Hotter rally intake and exhaust cams, with special ovate beehive valve springs and retainers.
  6. Higher flowing head, with lighter valve train, and surface turbulence valves.
  7. Windage tray and swing gate to prevent oil starvation under hard cornering.
  8. Rebuilt blueprinted VANOS unit.

Options usually purchased with this engine are:

  1. Light weight 240mm flywheel and clutch assembly
  2. MM EPROM chip and larger injectors

3200 FI OBDI or OBDII Engine: M50/M50tu/S50/S52   This engine is built tough to take boost. It is commonly used with a centrifugal blower (with or without a reduced pulley diameter) but will maximize it’s power better with a turbocharger.

The mechanical upgrades engineered into this engine to make it stronger for boost are:

  1. 8.6:1 compression forged alusil ceramic coated flat top pistons with thicker crowns. Optional hard anodized pistons for high boost levels.
  2. Heavy Duty wrist pins.
  3. Premium Crome Moly forged “H” beam rod, with 4 oil squirter grooves to cool off the bottom of the piston.
  4. Coated Tri-Metal rod bearings.
  5. 89.6mm Crome Moly forged steel crankshaft.
  6. Increased head flo with surface turbulence valves (reduces head cracking by minimizing detonation).
  7. Cams designed specifically for forced induction along with special ovate beehive valve springs and retainers.
  8. rebuilt “blueprinted” VANOS unit.
  9. Oil pan comes with Windage tray and swing gate, to prevent oil starvation under hard cornering.