For product assistance, please call (631) 737-0372.
ALL BMP CYLINDER HEADS ARE PRICED INDIVIDUALLY
THESE VORTEC-STYLE HEADS ARE CURRENTLY ON SALE AT 25% OFF RETAIL PRICING WHILE SUPPLIES LAST !!!
Bill Mitchell Products has taken the Chevrolet’s Vortec-style cylinder head design to the next level with these superior-performing 23° BMP SBC Aluminum heads. Originally known as the Motown from World Products, these Heads combine high-flow ports with generous 2.080” diameter Manley stainless steel intake valves and you can see where the extra power comes from.
They’re available bare, or in three different assemblies that are designed to match your camshaft’s valve spring requirements. A multi-angle valve job and Manley stainless steel valves make the assemblies an excellent value and a real time-saver for engine builders.
PLEASE NOTE: These heads feature straight Vortec style Intake Manifold mounting holes in addition to the conventional sbc intake bolt pattern.
BMP Now Offers Heads in
Unassembled Kit Form !!
Due to many requests from machine shops and engine builders, any of the assembled heads below are now available in kit form. This allows the flexibility to port match, shim springs to custom pressures, set valve guide clearances for unique applications, etc. without the inconvenience of disassembling the heads first. If you intend to modify your heads in any way, or if your engine builder will disassemble your heads anyway at your additional expense, or you are perfectly capable of assembling heads yourself and prefer to do so, this is the most economical way of purchasing your heads !! Just scroll down to the product list below and look for your desired part number and click the option box for your unassembled option!!!
Casting ID Number: WOR-077B
Material: 355-T6 alloy high density aluminum
Valve Seats: Intake (hardened), exhaust (hardened)
Valve Guides: Manganese bronze
Spring Seats: Machined for 1.560"
Valves: Manley stainless steel valves in assemblies
Valve Diameter: 2.080" intake, 1.600" exhaust (11/32" stem)
Guide Plates: BMP 702351-8
Rocker Arm Studs: Screw-in style
Rocker Arms: .150 ratio (use of 1.6 ratio may require elongation of pushrod holes)
Intake Runner: 215cc, standard port location
Exhaust Ports: 70cc, standard location
Combustion Chamber: 64cc, straight plug orientation, Vortec style chamber.
Spark Plug: 14mm .750" reach gasket style. Accel 416 or equivalent
Valve Job: Multi-angle intake and radiused exhaust
Valve Cover Rail: Raised w/ perimeter and center bolt pattern
Valve Angle: Stock 23°
Accessory Bolt Holes: Stock
024015 BMP 215cc Aluminum Head Flow Data
Valve Lift--.300 --.400 --.500 --.600 --.700 --.800
2.080 ------- 180 -- 227 -- 263 -- 279 -- 268 -- 268
1.600 ------- 141 -- 162 -- 177 -- 186 -- 194 -- 197
Methods used: Superflow 600, Flowed at 28" with a bowl blend 1" down, 1" radiused entry plate on the intake port, No exhaust tube, Using Manley RaceMaster valves.
|MOTOWN 23 DEGREE ALUMINUM VORTEC
HEAD ASSEMBLY BUYING GUIDE
Use this guide to match your Cam Spring Specs to our Assembled Heads & choose which assembly you need from the choices below. Please Note: Bare Heads contain no Valves.
-1 Assembled Heads: Hydraulic Flat Tappet Cam
1.250": 100 lbs. @ 1.810", 300 lbs. @ 1.250", coil bind @ 1.200"
MAX LIFT @ .570"
-2 Assembled Heads: Mech. Flat Tappet or
Hydraulic Roller Cam
1.437": 125 lbs. @ 1.810", 340 lbs. @ 1.210", coil bind @ 1.160
MAX LIFT @ .600"
-3 Assembled Heads: Solid Roller Cam
1.550": 200 lbs. @ 1.900", 480 lbs. @ 1.200", coil bind @ 1.150", max lift