Dashpot damper
Jaguar: E-Type Series 1 and 2 with SU-HD8 carburettors: All European models (1961-70), USA and Canada models to 1967 (OTS to 1E15979, FHC to 1E34582 and 2+2 to 1E77708) • XJ6 Series I with SU-HD8 carburettors to March 1971: 4.2 with A/C to engine no. 7L29581, 4.2 without A/C to engine no. 7L26479, 2.8 to engine no. 7G16692
with hexagonal brass head but without vent - length of the rod: 2.125"
Dashpot dampers are designed to slow the rise of the suction piston in the carburettor in order to give a richer mixture on snap acceleration. They vary considerably from type to type by varying the clearances in the assembled components. The oil in the dashpot is forced through the assembly and thus slows (dampens) the piston rise. A further difference is that some are externally vented (hole in the top) and some are internally vented (angled hole in the suction chamber) these are termed dustproof and non-dustproof respectively. It is essential that the correct part is fitted to ensure smooth Running of the engine.
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