prop size w/ another 200hp?
 

Recently built a 500hp 509. The original motor was a 300hp volvo penta vortec 7.4l. The original F6 props are too small. With an extra 200hp should I get the F7 props or possibly the F8 props?

Repost in the prop section. I just burned 20 minutes trying to find the prop pitches. Volvo is very secretive with these. Blades should be able to help. But I would also run the boat with existing props first. Get speed and rpm numbers so you have a base line...

Nothing but crickets over there. I did switch to a F7 (26P) and still spinning about 5k so this should be the right size. I'm interested in spacers for my 496 manifolds to read the AFRs but don't know who sells them. Rylar doesn't & the ones on Ebay are not the right size.. Anyone know who sells them?

I would call BBLADES for a recommendation.