My 2006 RXP seems to be getting slower.  It is not as quick at the start and is maxing out at about 56-58mph.  At the end of the season last year, I know I sucked up a rock and I had to pull out the impeller out.  There was a gouge in the wear ring and a ding in the impeller but I thought I still got ~64mph before I winterized it.  The supercharger was rebuilt with the metal spacers so I don't think that is it.  
During the start I also notice that it seems to rev quickly to close to 8000rpm without the force coming out the jet. Could this all tie to the impeller problem or should I look at something else.
				
			During the start I also notice that it seems to rev quickly to close to 8000rpm without the force coming out the jet. Could this all tie to the impeller problem or should I look at something else.
 
	


 
 
		 
 
		 
 
		