Technical Details

• Type: SU HD8 constant-depression carburettor, twin-carb configuration

• Application: Twin carb-setup for 4½ litre Daimler V8 (and other British V8s) Wikipedia+1

• Body size: HD8 specification (larger piston/air-flow than HD6)

• Fuel inlet: Standard SU banjo style feed

• Choke / Cold-start: Typically manual or thermostatic variant depending on original specification

• Condition: Supplied as core units; inspection recommended — rebuild kits, jets, needles available separately

• Note: Jets/needles must be configured to engine size, manifold and exhaust setup

Compatibility

Direct or adaptable for:

• Daimler V8 250 Saloon (4½ L variant) — original twin SU HD8 fitment. Wikipedia+1

• Other British V8s using twin SU HD8 carburettors (e.g., early Jaguar E‑Type 3.8, Jaguar XJ6 4.2 Series I)

• Custom and kit-car projects aiming for period British twin carb installation in the 3.5–4.5 L range

Additional Notes

Each carburettor set is inspected for throttle-shaft play, piston slide function and body integrity.
We strongly recommend a full rebuild (new needles, jets, pistons, dash-pot oil, float height check) before installation for peak performance and longevity.
Gasket/pancake kits for SU HD8 available — for example, compatible with the Daimler Sovereign 2.8/4.2L models with HD8 units. mecatechnic.com+1
Proper synchronisation of the twin carbs is critical to smooth idle and even running — flexible linkage, balance pipe and vacuum advance must be set accordingly.

Trade-in Offer

We welcome your used carburettors (SU, Stromberg, Weber, Solex etc) for trade-in credit towards purchase of these HD8 units. Provide clear photos and tag numbers for evaluation.

Shipping & Support

Worldwide shipping from the Netherlands. Carbs individually packed and clearly labelled for twin-set identification.
Technical support available for rebuild advice, jetting assistance and carb matching for your engine/manifold combo.

Carburateur Service Nederland
Classic carburettor specialists – Since 2018
www.carbservice.nl