If you did not change the cam, your engine is probably only making 50HP over stock.
Try a 26p B1 and I would not expect to run more than 3mph faster than she did before the engine mods.

It is a stock 27 hydro, I already got about 4 mph better from stock, but I just want my rpms up a little more do you think I could get 200rpm out of it??

Concider working with the B1 propellers if you wish to go into Labbing.

The Q4 propellers work well as is, if they work to begin with in the application in question. Interesting how times change as well as learning curves and getting 300 out of a hydro Q4 isn't such a good idea anymore (just kidding).

Run a 28 B1 and get some base line numbers. Then determine if a special Lab recipe is a option or if backing off the pitch or different geometry is the best idea.

you think i would spin a 26 B1 too high?

I have a bud with a 29' Fountain powered by at 525sc.
He runs a LH 26p B1 and has run a best of 75mph @ 5200rpm.

so is the concensus a 26 or 28 B1, I think Ill try a 26 and see where Im at. Anyone have 1?

We have test propellers available in 26 B1's.

$20 plus shipping, no strings attached.

do u have any solid hub ones?

Yes, hub are interchangeable (is that spelled right?)