VALVE - TRAIN COMPONENTS
SUPERIOR QUALITY, RACE & STREET PROVEN
A quieter, more powerful BMC 'A' or 'B' Series engine.
 BMC 'A' Series 1.5 :1 ratio |
 BMC 'B' Series 1.5 :1 or 1.6 :1 ratio |
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BMC 'B' Series Roller Rockers Apart from the increased lift ratio, this new set-up is a major departure from the traditional BMC design. The standard rocker posts, shaft and rocker assembly are replaced by a substantial ‘girdle’ incorporating a restricted oil feed to each rocker arm (refer Note 1) . This ‘girdle’ bolts onto the head with 4 new head bolts and 2 new inter. bolts (supplied) once the existing studs have been removed. Onto this is bolted individual rocker arm assemblies. Each rocker arm is fully machined from heat treated certified aircraft alloy extrusions. Fitted with large needle roller bearings mated to precision ground trunnions to reduce friction and increase engine power. Roller tips minimise valve stem and guide wear and give smoother, quieter operation (and can’t all ‘B’ Series stand improvement in this area ???) . Correct geometry improves efficiency by ensuring the intended camshaft lift is transferred. A giant step towards achieving our aim of rigidity and a reduction of reciprocating mass in the valve gear. For installation notes See YT Installation 2 - BMC B Series |
