Leading A-Series engine specialist since 1981
Considered by many as the ultimate carburettor setup for competition Minis, twin split Weber installations were originally used on the Works rally cars of the late '60s. They've been used very successfully over the decades on all manner of fast road and competition engines, giving more power potential than a single Weber or twin SUs, and the ultimate in engine bay kudos!
The principle behind this setup is to give a straighter, less restrictive inlet path from the carburettor barrels to the inlet ports on a five-port cylinder head. On the complete kits, we carefully trim one carburettor to allow the twin 45s to sit side-by-side, modifying both to use only one of the two barrels. On the DIY kit we leave this to the customer.
Testing on full-race engines has shown power gains over a single Weber 45, more pronounced on large-bore 1380s and 1460s.
We can supply DIY kits to suit either right or left-hand-drive Minis, selectable from the list above.
We also produce a complete Twin Split Weber Kit to include brand new modified carburettors, ready to go.