I have a 2004 210ssi chaparral 5.0L,it came with a 19p ss wide fan prop.over rives at 4800,can't get wot.bought 2 alum.turning point props 14 1/4x21 can get up to 53mph but no big push on the start.the 14 1/4x23 is about 51mph but low rpm.the wide fan ss 19p is about 52-54 mph but can open motor...