Posted 4/27/2013 15:25 (#3066205 - in reply to #3065978) Subject: Re: OK, Who knows about irrigation pumps. Here are the facts.
Soutwest Ks.
My guess is with the 6:5 ratio you are under the load curve on that engine. Haven't been around a 460 in that application but I know that 454 and 496 GM motors need a fair amount of rpm to generate hsp.