I think something like a 14P would be your starting point..

Got my 33 avanti on plane with 1 454/hp500 clone. The motor deffinatly didnt like it but i was so mad i just hammered down. Took about 2 minutes 😂. Had a 26p bravo1 prop on it

You guys are totally missing the point of this guys post. He wants to carry spare props with the sole intent of getting on plane with one engine. I take that as when he looses an engine, he will take off his normal props and put on the prop that is going to be used to run on one…..

He’s not asking if the boat will get up on plane with one engine and it’s normal props…

lol..

I seldom post, and I wanted to chime-in with a response. Maybe learn from the success of others. I do understand the call of the question.

If it were me, I'd invest in a set of 24P 4blade bone stock Bravo 1 props. (Or maybe 26s)

Good enough to swap BOTH of them on to get you home if you tore up two props.
"Meaty" enough to likely get you up on plane on one, should you need to do so.

Carry an extra couple of prop nuts, and thrust washers. (It would suck to have a prop with you, but drop all the nuts and washers you have into deep water. )
If you have the hubs with the inserts, go ahead and carry an extra set of those two (in the props in the box).

What prop math gets you to 24P with a single 496 in a 32 Sunsation? I’m not being a ball buster, just want to know what gear ratio, rpm, and speed you think he would see and what would be easier on the remaining drive train a 24P with the throttle pegged going 40 at 3500 or a 15P with the throttle pulled back spinning 3500 at 27-30???

To me the key to doing this is setting the boat up to run on plane with the least stress possible on the last remaining drive/engine.

I didn't use any math. I was just suggesting a prop that has some bite, but not too much so it would have some slip to not overstress the components.

I couldn't get my 37' AT on plane with 2 props, let alone 1. lol
I believe I have a real aggressive X-dimension.

Very interesting idea. I'd be concerned about stress on the drive too. a single bravo 1 pushing my 29 might be ok, no idea how much push before something breaks though.