MED ST1 CAMSHAFT KIT

Which camshaft should I choose?
It's entirely dependant on your driving preferences and the spec of the other engine components. Road trip mile muncher or daily driver? The most civilised HT profile would be ideal. Fast road car for country lane blasts? RS makes a good compromise. Fast road/trackday/rally car for the weekend? Go for the XT. A more conservative camshaft spec can often result in a more enjoyable driving experience on the road, as the power band is lower in the RPM range. 

How much power can I expect?
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 outouts could be expected:
HT - 100lb.ft/100bhp
RS - 100lb.ft/106bhp
XT - 100lb.ft/112bhp

Which engines will this fit?
All BMC A-Series and A-plus engines, with the exception of eight-port head conversions. Standard 850 engines do not use camshaft bearings, so you will need to line-bore the block and fit bearings.

Can I change my camshaft in situ?
It has been done, but we wouldn't recommend it. 

Do I need to fit 1.5:1 rockers?
Our camshaft profiles have all been optimised to work below 1.5:1 rockers, but it's not essential. We also supply 1.3:1 ratio rockers to cater for personal preferences and all engine builders have their own tastes.   

Do I need double valve springs?
Ideally, yes. Our uprated road springs sets are highly recommended to remove the chance of valve bounce at higher RPM. These are available separately or as the Stage 2 camshaft kit.

How about adjustable cam timing setup?
It's essential; without adjusting the camshaft timing to suit the new profile, you will not be able to optimise engine performance. Stage 2 comes complete with an adjustable vernier duplex timing kit.