proper prop selection help
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proper prop selection help
Hope someone can save me some time here. I own an older Powerquest, when it was still called Powerplay. Its a 230 conquest. Boat still in great shape and now has fresh motor, putting out around 425hp. Still has smaller peanut port heads though for now, ran out of money at the time. But boat pulls hard with these heads.As of now, it goes about 59-60 mph on gps. I have a 23p mirage on there now. I realize that another set of heads would help , but for now, I want to make sure I am getting all I can with this. I did a slippage calculation, ( 5,200 rpm, 1.5 ratio, 23p, 59mph,) and it works out to about 22% slip. Even if I trim up more, say to 5,300rpm, I gain no more speed. Before I did the calculations,I always assumed my heads were my limiting factor as far as speed goes, but 22-23% slip seems high. Would not mind bumping rpms back down to 5,000 wot. Wondering if anyone can recommend a good prop for this boat with these parameters. I realize the obvious is to go up in pitch, but which style prop would help me most with this hull. Thanks.Rich
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Re: proper prop selection help
I would think that you will be hard-pressed to ever get your hull much below 20% slip. If you could get to 15-18% you'd be doing great. Doesn't your boat weigh 4500 lbs +?? At my marina a gentlemen has a 225 Crownline. They do not make this model anymore but he ordered it with a 502. I'm sure the boat is lighter than yours and he can run a legit 68 GPS although it is not driveable (safe) Its a 2O-21 deg. hull and just not up to that kind of speed. Sounds like you need to try a 25P. Good luck
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Re: proper prop selection help
Originally Posted by Kentz
I would think that you will be hard-pressed to ever get your hull much below 20% slip. If you could get to 15-18% you'd be doing great. Doesn't your boat weigh 4500 lbs +?? At my marina a gentlemen has a 225 Crownline. They do not make this model anymore but he ordered it with a 502. I'm sure the boat is lighter than yours and he can run a legit 68 GPS although it is not driveable (safe) Its a 2O-21 deg. hull and just not up to that kind of speed. Sounds like you need to try a 25P. Good luck
Last edited by rich allen; 06-26-2004 at 07:19 AM.
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Re: proper prop selection help
I own a 93 Conquest with a stock 454 mag with abravo 1 drive spinning a modified 23p Mirage turned down to a 22p. Mine runs at 5100rpm at 62mph.
I think you'll be hard pressd to see anything over 65mph with this hull. I've talked to others that had these and have put some pretty bigp power to no avail. This hull was never designed to see those speeds, simply a nice riding, mid performing boat in it's day. She is a very good riding boat and very predictible + fairly good on gas! We really love ours and she's a beauty condition wise. I tried 5 different props last year and it was amazing what the boat did not like. The worst was a bravo 4 blade. I did talk to Huston Props and he thought he could get me another 2-3 mph doing some work.
I think you'll be hard pressd to see anything over 65mph with this hull. I've talked to others that had these and have put some pretty bigp power to no avail. This hull was never designed to see those speeds, simply a nice riding, mid performing boat in it's day. She is a very good riding boat and very predictible + fairly good on gas! We really love ours and she's a beauty condition wise. I tried 5 different props last year and it was amazing what the boat did not like. The worst was a bravo 4 blade. I did talk to Huston Props and he thought he could get me another 2-3 mph doing some work.
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Re: proper prop selection help
Originally Posted by PQConquest
I own a 93 Conquest with a stock 454 mag with abravo 1 drive spinning a modified 23p Mirage turned down to a 22p. Mine runs at 5100rpm at 62mph.
I think you'll be hard pressd to see anything over 65mph with this hull. I've talked to others that had these and have put some pretty bigp power to no avail. This hull was never designed to see those speeds, simply a nice riding, mid performing boat in it's day. She is a very good riding boat and very predictible + fairly good on gas! We really love ours and she's a beauty condition wise. I tried 5 different props last year and it was amazing what the boat did not like. The worst was a bravo 4 blade. I did talk to Huston Props and he thought he could get me another 2-3 mph doing some work.
I think you'll be hard pressd to see anything over 65mph with this hull. I've talked to others that had these and have put some pretty bigp power to no avail. This hull was never designed to see those speeds, simply a nice riding, mid performing boat in it's day. She is a very good riding boat and very predictible + fairly good on gas! We really love ours and she's a beauty condition wise. I tried 5 different props last year and it was amazing what the boat did not like. The worst was a bravo 4 blade. I did talk to Huston Props and he thought he could get me another 2-3 mph doing some work.