Thoughts onn a 23p prop???

[scott8058]

I have a 95 bayliner 2050 ss original 5.0 swapped for a 355 chevy and an alpha one. Guys who built it claim it has forged rods and pistons, bored over, and a mild cam. All i know for sure is that it has an edlebrock intake and 4 barrel carb. So here's my q, it originally had a 15.5 x 19p ss prop and i could spin it about 5300 rpms (way to high i know) also with that prop (and 2 adults & 3 young kids) when it would hit 4k rpms, ne more throttle and it would bog down for a sec then rip wide open and run like 50 @ over 5k rpm. There was no in between either 35mph or 50 something. So i changed it to a 14.25 x 21p aluminum and it runs great thru the whole rpm range (no bog unless i hit it hard) and i didn't lose any top end but i can still spin it to 5000 or a little higher playing with the trim. Would i have any benefit going to a 23p? We tube and ski but it has plenty of power to pull both w both props and honestly im happy with the hole shot on both i want a higher cruising speed and more top end when i want it!

Notes

- Normal load 2 adults and 120lbs of kids, half tank of gas
- Guy who built motor est it makes 325 hp......any thoughts on that?

 

[steelespike]

Re: Thoughts onn a 23p prop???

What is the wot rpm and speed with the 21?
No telling what the new wot might be though I think it may have been 5000 previously.
A 23 would put you at 4600 to 4700. could add some speed but will have a slower hole shot.
Also may be slightly more finicky at low cruising speed. I guess a 23 might produce faster cruising speed but at what actual throttle setting.

 

[Maclin]

Re: Thoughts onn a 23p prop???

Should not be a bog, may need some carb tuning for accel pump shot and jetting maybe. Also, it kind of sounds like it is cammed for a higher RPM power band too, I hope not because it will be kind of on-off like that above 3500rpm or so.

 

[Tail_Gunner]

Re: Thoughts onn a 23p prop???

http://forums.iboats.com/showthread.php?t=566376&p=3888712#post3888712

 

[scott8058]

Re: Thoughts onn a 23p prop???

Thanks for the reply's, this is the 1st chance ive had to check this thread. Ive had a lot of people tell me the carb thing so im sure it couldn't hurt to learn how to rebuild it and just do it. As for being cammed for higher rpm....it def feels like it has more power at higher rpms, if thats what you mean.