Physical Specifications GM 12480011 (SB2.2) Castings Intake runner volume     282cc Combustion chamber volume     46cc Intake valve angle 11 deg. x 4 deg. Intake Valve     2.180 dia. x 5.640 length     Serdi #    HP2849-B1 (50 deg. seat) Exhaust valve angle 8 deg. Exhaust Valve     1.625 dia. x 5.540 length     Serdi #    HP2684-B1 (55 deg. seat) Intake port opening at gasket     2.13H x 1.51W Distance from floor to deck at gasket     (Black plug) 1.86 Intake min. cross sectional dim.     2.79 sq. in. Notations Deck flat milled .115" Valve seats dropped .050" Pushrods are clearanced for the most commonly used rocker systems. Cylinder Head Design Description The GP Tech 2 design retains all of the same characteristics of GP Tech 1 design, with the exception of the intake valve seat design. This area is dropped .050", and the floor angle, left to right, is somewhat steeper. The seat being lower in the bowl allows the centerline of the runner to have a better view of the valve window. The steeper floor angle also contributes to this effect. In combination, these modifications should slightly enhance power at peak, and make it easier for the engine to make power above its power peak. Note: Due to the deep bowl of this head, intake valve spring seats must not be lowered at all! The head includes as standard 45 degree valve seats. Flow numbers can be greatly enhanced, in particular the exhaust flow, with a 55 degree exhaust valve seat, combined with a 50 degree intake valve seat. Weld Tech gives the customer the option of either valve job. The amount of actual performance increase on the dyno will vary from one engine combination to another.   Click for larger version of graph

 

Home | Products and Specs | New Products | Custom Programs | Company Profile | Contact WELD TECH | Links

WELD TECH 1789 South Green Street Brownsburg, IN 46112 (317) 852-4450 Fax: (317) 852-5291