Being an ex white van man I can say that it's completely unrequired. white van drivers seem to manage extreme feats of acceleration and speed from just the ordinary diesel engine.
Fair play Bernie, that is first class

Bet thats a lot of fun for upsetting the Max Power lads in their blinged up Corsa's and Saxo's. Come to think of it I bet it's a lot of fun upsetting a lot of things