Mopar Aluminum Big Block

BMP Hemi/Wedge Aluminum Engine Blocks ( Available late 2018 )

Bill Mitchell Products engineers have collaborated with leading Chrysler racers and developed a highly refined version of the original 426-style  block. It's been designed using CAD/CAM 3D technology not available when the original was developed, and is manufactured to far more critical specifications. The BMP 426 Hemi features dual pattern Chrysler/GM bellhousings & more efficient lubrication. This is the ultimate block for Chrysler applications! Available in Hemispherical or Wedge configurations.

After the first handful of castings that shipped out in August we had decided to make a few small modifications at the foundry. Fortunately this will not take too long and Projected ship dates for new orders will begin in the later part of 2018. Due to the demand we are taking orders and asking for small deposits to guarantee a spot on the schedule.

Update: As of 11/15/18 we are looking good at the foundry with our changes and are pouring the first samples now. As of right now we are still on schedule and hope to begin shipping by the end of December. 

TECHNICAL INFORMATION:

  • Material: 357-T6 Aluminum
  • Deck Height: 10.725"
  • Deck Thickness: .600" minimum
  • Cam Bearings: Stock (can be machined for 60mm)
  • Camshaft Location: Standard
  • Lifter Bores: .904"bronze bushings on a 45 Degree Lifter Bank with .035" feed hole
  • Cylinder Bore Spacing: 4.80"(stock)
  • Bores Available: 4.240" and 4.490"
  • Maximum Bore: 4.560"
  • Sleeves: Centrifugally cast ductile iron 
  • Water Jackets: Expanded for better cooling
  • Lubrication: Priority main oiling system
  • Oil System Features: Std oil pump location,
  • Crank Clearance: 4.500" max stroke, 4.750" with additional clearance
  • Main Caps: crossed bolted nodular iron
  • Main Cap Hardware: ARP 1/2" Studs
  • Rear Main Seal: Std
  • Oil Pan Rails: Std
  • Dip Stick: Std
  • Fuel Pump: OEM mount
  • Starter: OEM mount
  • Motor Mounts: Dual (front and side)
  • Cylinder Head Holes: Extra deep holes for more thread engagement, Blind tapped to prevent leaks
  • Bellhousing: Dual (accomodates stock and GM)
  • Weight: Approximately 175 lbs.
  • Cam Bearings: Std
  • Dowel Pin Kit: BMP 701595-K

MORE INFORMATION

  1. Click here to view Instruction Sheet. - PDF Adobe Reader Required.
  2. Click here to view Sleeve Tech Bulletin - PDF Adobe Reader Required.