severe porpoising with any prop

[jwbbuck]

I've tried 3 and 4 blade props of various pitches on my 23 Warlock with a 530 HP/502 Chevy, Bravo and short Bob's nosecone. I get severe, continuous porpoising with anything other than neutral trim position with every prop I've tried. I can drag the tabs and it only helps a little. What should I try next?

[Havasu Hangin']

Cat or V?

[gnarley]

Chopper or Cleaver?

[jwbbuck]

It's a V-bottom. No steps. I've tried 25" 3-blade Mirage Plus, 27 Hydromotive 4 blade and a 26 Bravo 4-blade. All caused about the same, severe amount of porpoising. I've run the boat with full load and empty and the results are the same.

[BLOWN HOWARD]

Hey John I take it you got the prop how did it do with it on there? Do you wanna sell the other props you have let me know what you got.

[jwbbuck]

Blown Howard,
The 25 Mirage Plus seems to work well. It only has slightly less midrange speed than the 27 Hydrmotive I was using. I can't check out anything over 4500RPM because the boat is porpoising so badly, I get scared. I'll check for hook in the bottom again, but then I may get rid of the 2" short nosecone and go back to stock.
I borrowed every other prop I've tried, so I don't have any for sale.
Buck

[BLOWN HOWARD]

Hey glad to hear it worked out for you hope you can get the porpoising out of it. Did you say you have a 2" lower on your drive if so that might be your problem