300/440/550 js 440 impeller

[dakota]

Hi, Im looking to upgrade the impeller on my 77 js 440. It has the stock one in it now and the motor is stock as well but I will be adding a pipe soon. I'm a big guy 250#. What impeller should I go with?

 

[restosud]

try either a 15 or 16* or a 14/17 variable.
at 250#,don't expect stellar perf.