MED ST3 CAMSHAFT KIT - 1.5 ROCKERS

It's impossible to answer without knowing the exact spec of the engine and the quality of the rebuild. However, for a rough guide, if we were to take an identical 1380cc high performance road engine with a modified head, re-worked crankshaft, single HIFF44 carburettor and 1.5:1 roller rockers, the following peak outputs could be expected: HT - 100lb.ft/100bhp, RS - 100lb.ft/106bhp, XT - 100lb.ft/112bhp.

The supplied rockers will not fit a small-bore engine unless you have converted to a 1275 cylinder head and pocketed the block for valve clearance. The camshaft itself will suit all BMC A-Series and A-plus engines, with the exception of eight-port head conversions and late Rover MPi Minis (1996-2000). Standard 850 engines do not use camshaft bearings, so you will need to line-bore the block and fit bearings. So basically, this kit will suit all 1275 engines with some exceptions.

It has been done, but we wouldn't recommend it.

Our camshaft profiles have all been optimised to work below 1.5:1 rockers, but the 1.3:1 ratio rockers can work more effectively on certain engines. 1.5s usually give more power thanks to the increased valve lift, however there is no one-size-fits all, and some applications will benefit more from the 1.3 ratio. If you're unsure please call or email for more information.