Obie and everyone
Many thanks for the input. Just for info my engine is a Crossflow uprated to 1700, with a fast road cam - carried out by Vulcan Enginnering and twin 40s. With my drop down screen and the noise from the 40s its great just the way it is. But if you get the chance to watch Robbie Coltrane programme on the Supercharger, which is available on YouTube, go for it. It's great watching with a mug of tea and some biscuits!
