my truck was sold to me under the premise that it had a 913 on it, but i never paid no mind....I brought it to be flowed and balanced and It ended up being an 180 with that cut in the helix. There were some 180's and 215's that shared the same plunger part number, but the 913 was different.....yet it has a visible cut in its plunger too, but I am wondering if it not as substantial......I really wish that pump guy didnt tell me this stuff now it really bugs me.
My 180 put the hurt on the 10hp test stand though. He said it had 16mm rack travel before showing it boost. Then he showed it boost and the stand dropped 300 rpm, and wouldnt turn it through 4k stopped before 3500. I just dont like the idea of having fuel........bad spot w/ timing retard.........and fuel again as the rack turns the helix seems like a bad idea to me