Valves, Guides, Springs & Caps - MGB

The selection of valve springs is made by taking into account the combined specifications of the valves, camshaft and rocker gear; once again it is felt that the point must be stressed about taking the utmost care and attention when choosing and assembling these components on an engine.

The road uprated springs are designed for use with standard ratio rocker arms and any of the camshaft profiles up to, but not including, the racing types. They will help to improve power in the usable rev. range, while not being so strong that they might affect reliability. They are designed to be used with alloy valve caps but can also be used on pre-18V engines with the early double spring type valve caps.

Road Uprated Valve Springs 
Moss Special Tuning's design of uprated valve springs are made to suit the range of camshafts together with standard ratio rockers and are usable up to 7000rpm; they are supplied as a set of 8 double springs.

On 18V engines (with single springs as standard) alloy valve caps are definitely required (see below).

Competition Uprated Valve Springs 
These are suitable for the 'B' series engine when a high lift cam and high ratio roller rockers are used. They are supplied as a set of 8 double springs and in a conscientiously built engine can be used up to 8000rpm, they must be used with alloy valve caps (see below).

Valve Caps 
Weight reduction of all reciprocating components within an engine is vital to the fuel efficiency; the lighter a component, the less power will be lost through friction and heat. For this reason, along with the benefits of less stress and wear on related components, Moss offer lightweight valve caps. These aluminium caps are approximately half the weight of the standard steel caps, while also being stronger. They are designed to match the later type of valves and must be used only with double valve springs; they are supplied individually.