SU Carburettor Suction Chamber Piston Spring Red & Green 11.25oz At 3.875"

Load at length 11.25 oz @ 3.875 in. Suitable for 2in diameter Throttle Carburettors only. Piston Spring phased out heavy weighted Pistons and are designed to produce a resistance to the rising Suction Piston in order to balance the venturi size with the correct mixture/air flow. The ultimate aim being that the engine should be able to produce full power with the Piston fully raised together with progressive acceleration and steady cruising over the whole Range of driving. Rich mixture for fast acceleration being provided by the Damper.

SPRING FOR NORMAL SUCTION CHAMBER ( WILL NOT SUIT HIF OR BALL BEARING TYPE CHAMBERS)