Spray Rails

[spareparts]

Volvo used to market a thing called speed rails, they were aluminum extrusions that had a turned down edge to them, they installed on the existing strakes on your boat. They were patterned after the hull designs on the Volvo "Bat Boats" that used to race offshore in Europe. I ot a set on a friends 23 Chris Craft that had a pretty hot 400 small block in it, it didn't pick uo the top speed any, but it improved the midrange efficiency, made the boat ride higher and dryer, it moved the water break on the hull side a good four feet aft. I haven't seen them adverstised in quite a while. You might be able to find a set on ebay or somewhere, they weren't exactly cheap when sold new(around $200), but you might be able to find a set somewhere.