SU Carburettor Piston Spring   P/N AUC4826

This spring is RED and GREEN on the coil end. Load is 11.25oz. at 3.875in. Length

Suits:

SU Carbs; HD8; HS8;

As used in:

Aston Martin DB5; 1962-64 3 X HD8

Aston Martin DB6; 1965-66 3 X HD8

Aston Martin DB6; 1967-72 3 X HD8

Austin Healey Mk III; BJ8 6 Cyl. 1964-=68 2 X HD8

Daimler Majestic Major V8; 4.5L. 1964 2 X HS8

Daimler Limousine; 4.2L. 6 Cyl. 1973-75 2 X HS8 AED

Daimler Sovereign 2.8L. 6 Cyl. 1968-71 2 X HD8

Daimler Sovereign 2.8L. 6 Cyl. 1971-72 2 X HS8

Daimler Sovereign 4.2L. 6 Cyl. 1967-71 2 X HD8

Daimlerr Sovereign 4.2L. 6 Cyl. 1971-73 2 X HS8  

Jaguar 4.2L. 420 Auto. 6 Cyl. 1967-68 2 X HD8

Jaguar 4.2L. XJ6; 6 Cyl. 1968-71 2 X HD8 Th.

Jaguar 4.2L. XJ6; 6 Cyl. 1971-73 2 X HS8 AED

Jaguar 2.8L. XJ6; 6 Cyl. 1972-73 2 X HS8 AED

Jaguar 3.4L. XJ6; 6 Cyl. 1975-76 2 X HS8 AED

Jaguar Sovereign 4.2L XJ6; 1975 HS8

Jaguar Sovereign 4.2L XJS Series II; 6 Cyl. 1975 on HS8

Land Rover 109; 6 Cyl. 1967-68 HD8

Rolls Royce B61 Engines - Power Units 6 Cyl. 1974-75 2 X HS8

Rover 2.6L; P5 1963 with HD8

Rover P4 6 Cyl. 1963 with HD8

Rover 3L. P5; 1958-64 with HD8

Rover 3L Coupe; P5; 1965 with HD8

NOTE:

This spring is suitable for 2 inch diameter Throttle Carburettors only.
The Piston Spring phased out heavy weighted pistons, 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.

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

For lighter load in 2" carbs use AUC2107 [Light Blue & Black] [Replaces AUC5014] 4.5oz. @ 3.875"  

For heavier load in 2" carbs use AUC4818 [Light Blue & Red] [Replaces AUC2091] 18oz @ 3.875"