Recalling some trips to the dyno with a P-car I remember my engine guy
getting significant power increases using an adjustable fuel pressure
regulator and tweeking the pressure between runs...I think it probably had
something to do with the spray pattern as influenced by the fuel pressure?
Has anyone messed about with that on a VW motor?  I recall getting 20-40hp
(on a 400hp motor,)  but on a 100hp Van motor...it might be 4-5...enought to
bother with.

  Don Hanson