i have been playing with the primary pump on my 750DP. i have the black cam in position 2.the strange thing i notice is that is seems like the pump arm only moves about 50 percent of its total travel room. is this normal or not? i have tried different colored cams with the same luck. i recently upgraded to a 50cc pump because i could not get enough of a shot with the stock pump.

thanks for any help
Brian

 

Have you tried the yellow cam for a 50cc pump?

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Big 454 72 Chevy Nova
383 86 Camaro Z28
10.5:1compression Dart Pro 1 Aluminum heads 215cc,234dur.488lift exh&int,Victor Jr. intake, 770 Holley Avenger vac.sec 400 crank,flat top pistons,tranny shift kit,2500 stall converter. 3.42 ,Hooker Headers,2.5inchpipes with 40 s. Flowmasters,MSD coil,MSD module.

 

no i did not try the yellow cam but the pump came with the orange cam. i thought the black was the mowt aggressive cam.

b