BILL MITCHELL PRODUCTS BMP Cylinder Heads Aluminum Ford Small Block 275cc, 285cc 10Degree 2.250" x 1.625"
The BMP engineering team has developed what is the ultimate competition cylinder head for 302/351 Ford small block applications. It features a highly advantageous 10° valve angle (with parallel rocker arm mounting) and some humongous ports. The “as-cast” intake runners are available in 275 and 285cc with huge 102cc exhaust ports. Add the CNC porting option and a 310cc intake runner is yours. Designed for use with all power-adders, the 10° BMP SBC comes with provisions to use two extra head bolts per cylinder as is offered with the companion BMP SBF Aluminum block or WORLD Iron Block.
- Heads utilize standard Windsor Bolt Pattern. Some modifications may be required when using standard Windsor intakes.
- Custom Sheet Metal or Edlebrock #2868. Some modifications are reqired to the intake face of the cylinder head to accept the Edlebrock bolt pattern.
- You must make sure that the intake water cross over ports line up with the holes on the head.
- For crossover water passage, you may have to drill two holes into the head to allow water flow between the intake and head.
- Use a gasket as a template locate your drill points.
- Casting ID Number: I-081A 285cc or I-081B 275cc
- Material: 355-T6 alloy high density aluminum
- Valve Seats: Intake (hardened), exhaust (hardened)
- Valves: 2.250 Intake, 1.625 Exhaust
- Valve Guides: Manganese bronze
- Spring Seats: Machined for 1.560"
- Valves: Manley stainless steel valves in assemblies
- Rocker Arms: Shaft mount system required, JESEL part#KPS371149 or CROWER part # 75157 (use of 1.73 ratio will require elongation of pushrod holes)
- Intake Runner: 285cc, standard port location
- Exhaust Ports: 102cc, standard location (dual exhaust bolt pattern to accommodate large custom headers)
- Combustion Chamber: 64cc Spark Plug: 14mm .750" reach gasket style
- Valve Job: As Cast Heads do not have a valve job
- Valve Cover Rail: Raised
- Valve Angle: Stock 10°
- Head Gasket: Cometic http://www.cometic.com/search.html?q=manowar
- Accessory Bolt Holes: Stock
BMP 275cc 10 Degree Race Aluminum Head Flow Data
Valve Lift--.300 --.400 --.500 --.600 --.700 --.800
2.250 ------- 220 -- 283 -- 327 -- 352 -- 365 -- 347
1.625 ------- 166 -- 204 -- 222 -- 237 -- 243 -- 246
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 Severe Duty valves.