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The BB-2 Plus heads work well with a heavy car and smaller engine (454-509 cu in). The BB-2 Plus has a 312 cc intake port and flows over 340 cfm with only the bowls blended and the intake ports matched. The CNC heads have 320cc intake ports and flow over 370cfm fully ported. For a flow chart click on Technical Information below. Both heads may be purchased angle milled to 110 cc. The combustion chambers are 119 cc or 115cc and are properly shaped for use with either methanol or gasoline, preventing detonation.
While creating the BB-2 Plus CNC, the professionals at BRODIX invested many long hours on the flow bench and at the track developing a completely ported cylinder head. The BRODIX porting design was incorporated into a 100% CNC ported masterpiece that can be mass produced. The CNC ported BB-2 Plus castings are CNC ported to a mirror finish and flow within 1% of each other. The bottom line is that our customers can now buy the most accurate, best flowing out-of-the-box cylinder heads available at the best price. The valve angles are 26 degrees, same as stock GM big block heads and accept all standard pistons, intake manifolds, and rocker arms. The exhaust ports are raised .600 higher than stock, and the valve cover rails are now raised to assure no oil leakage. These heads are available with 1.645 OD triple springs. All Bare Heads from Brodix DO NOT have valve jobs done or guides honed. |
On all complete assembly packages, it is very possible that the valve springs are not correct for your camshaft. All valve springs should be checked for compatibility to your camshaft. Severe wear of valve train components and severe engine damage could result from failure to do this. Check spring requirements before heads are installed on the engine. If in doubt please contact your camshaft manufacturer or USA Performance Parts. We do carry optional springs for all of your needs.
