Rebuilding plastic pump to metal case?

[gbest]

My 03 GTX SC has the plastic jet pump.
The wear ring was toast, and the impeller was dinged up a bit.
I replaced the ring and filed the edges of the impeller, thrust is much improved.
The only issue is a woh woh woh sound when taking off.
My buddy's 05 GTX sc is a bit faster and no sound.
Could this be caused by the plastic case flexing?
There dosen't appear to be much to the pump, how hard would it be to swap the components into a metal case?

[Pale Rider]

If I`m not mistaken the components are different between the plastic housing and the metal ones...PR...

[gtxsc03]

PR's correct. Very few of the pump's internal parts interchange. The impeller and wear ring are the same on GTX pumps. RXP impellers and wear rings are larger diameter. Find a complete pump or go to your dealer and have them put one together for you. It's expensive, but you'll have all new stuff in it.

[SuperCharged03]

I did my 03 2 years ago and worked for the dealer and my cost for parts alone was $560.00. I used my old prop, other than that nothing else was re-useable. I had no choice as I was missing nearly every fin inside the pump housing, so I did the upgrade and I also had all the proper tools to doo it.