SU Carburettor Piston Spring   P/N AUC4587

This spring is LIGHT BLUE on the coil end  Load is 2.5oz. @ 2.625” Length

Suits:

SU Carbs; HD8; HS8;

As used in:

AC 16.56HP 1952 H2 x 3

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

Austin Healey Sprite Mk II; III 1961-66 HS2 x 2

Austin Healey Sprite Mk IV 1967-68 HS2 x 2

Austin 1300 GT 1969-72 HS2 x 2

Austin Princess 1800 “Special Tuning” 1976-78 FHS6 x 1 

Fairthorpe w/Triumph 6 cyl. engine 1958 H4 x 2

Fairthorpe w/Triumph Vitesse 6 cyl engine 1966 HS2 x 3

Hillman Minx “Derrington” conv. 1956 H2 x 2

Hillman Minx “Alexander” conv. 1958 H2 x 2

Lotus Elite 1220cc 1957 -1958 H4 x 2 & H4 x 1

Lotus 100E Ford eng. 997cc. 1959 H2 x 2

MG TB; TC 1939-50 H2 x 2 [when fitted]

MG TD 1950-53 H2 x 2

MG TF 1250cc;1953-54 H4 x 2

MG TF 1466cc. 1954 55 H4 x 2

MG TF Comp. 1466cc. 1954-56 H6 x 2  

MG B “Special Tuning” 1969 HS6 x 2

MG Midget 1961-63 HS2 x 2

MG Midget Mk II; III; 1963-74 HS2 x 2

MG 1100 1962 63 HS2 x 2

MG 1300 196972 HS2 x 2

Mini Cooper 998cc. 1964-69 HS2 x 2

Mini Cooper “S” 998cc. 1310cc. 1964 71 HS2 & HS4 x 2

Mini Cooper “S” “Special Tuning” 1970 on H4 x 2 

Mini Cooper “S”  GP2 970cc; `070cc; 1275cc. H4 x 2

Mini Cooper Special Manifolds HS4 x 2

Morris Minor “Speedwell” conv. 1959-61 H2 x 2

Riley Kestrel Mk II 4 cyl. 1968 69 HS2 x 2

Vanden Plas Princess 1098cc 1964 HS2 x 2

Vanden Plas Princess 1275cc. 1968-72 HS2 x 2

Wolseley 1100 1965-66 HS2 x 2

Wolseley 1300 1968-74 HS2 x 2 

 

NOTE:

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 CHAMBERS (IT WILL NOT SUIT HIF OR BALL BEARING TYPE CHAMBERS)