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03 daytona with 525

Old 04-20-2005, 11:11 PM
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Default Re: 03 daytona with 525

It sounds like you have the correct prop the way it is. Given a little seat time, I'm sure you'll be able to squeeze out another 100 to 200 rpm's when you get comfortable with the boat.
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Old 04-21-2005, 06:43 AM
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Default Re: 03 daytona with 525

is a lab finished prop worth the moneyY
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Old 04-21-2005, 07:57 AM
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Default Re: 03 daytona with 525

gsmith,

It depends what you consider "worth the money"? To go fast gets expensive. If you gain 3-4 MPH with a labbed prop (which is pretty typical) I would say that it's worth it. Again, a labbed prop doesn't like to hit bottom or debris, so if you are in an area where that is an issue, perhaps you will want to have a couple props..one for everyday use and one for speed (poker runs?). Typically I've read that it takes 15 horsepower to gain 1 mph once you've attained your highest speed...if you gain 4 MPH with a labbed prop, you've saved yourself the money it would cost you to gain 60 horsepower. That being said, a lab job is anywhere from $200-$400...how much does it cost for 60 horsepower??? My guess is it would be substantially more. I think you should definitely get the motor broke in and get comfortable with some seat time before you spend ANY money on upgrades...then you can figure out what your true needs are. You might even find a MPH or three by having a professional look at the bottom of the boat...remove hook and correct straightness....of course that comes with a price as well. Let us know what route you decide to take.
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Old 04-21-2005, 11:35 AM
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Default Re: 03 daytona with 525

Lab finishing at best might net you 2-3 mph, 4 is pushing it and there are no guarantees. It substantially weakens the prop and causes much more slip during hole shot and mid range cruising speeds. I personally won't lab finish, since it takes away from all other areas of performance to gain a few mph on top end. Lab finishing is for the race course and ultra high end speed applications. How often will you actually be running the boat at max capacity vs. mid-range cruising speeds? I've gone through all this before and my advice is to save your money for gas.
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Old 04-21-2005, 11:41 AM
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Default Re: 03 daytona with 525

I completely disagree with Harper on this one that it's not worth it....but he does bring up a few valid points. The prop will be weaker as I had mentioned before and it won't last long with debris or bottom in it's future. If you have the right person doing the labbing and depending on lots of other variables, a labbed prop can give you 5mph or it could give you nothing. It all depends on how the other variables are working together. I completely disagree that a labbed prop will sacrifice slip/holeshot/midrange. It will depend on what you are looking for and who is doing the work on your prop. I can guarantee that you can get a labbed prop to make different changes to certain areas of your boat...if you are looking for nothing but top speed, the propshop can help make a prop that will work best for that application (and maybe sacrifice something as Harper has noted). If you are looking to increase your midrange cruise speed/efficiency a propshop will be able to help you...again, it comes down to what you are looking for in a prop and how much the other variables are or are not working. But for the price to have a prop labbed, the advantages for possible increases in certain areas definitely outweight the disadvantages IMHO.
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Old 04-21-2005, 03:56 PM
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Default Re: 03 daytona with 525

I agree somewhat with both Dave1972 and Harper220, but i am going to add that (in my opinion) speed depends on the amount of SLIP... If you're boat runs at 8 to 10% SLIP, your doing extremely well.... If you're higher in the slip ratio, then you start to think change in prop.

Last edited by TimeToBurn; 04-21-2005 at 04:01 PM.
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Old 04-21-2005, 06:52 PM
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Default Re: 03 daytona with 525

how can you tell slip ratio?
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Old 04-22-2005, 08:49 AM
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Default Re: 03 daytona with 525

gsmith...there's an interesting calculator online that is kind of fun to use. Slip is a relationship between theoretical speed and actual speed shown as a percentage. Take a look at: http://www.go-fast.com/Prop_Slip_Calculator.htm
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Old 04-22-2005, 09:50 AM
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Default Re: 03 daytona with 525

Here's another one: http://www.hillpropellers.com/propcalc.html
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Old 04-22-2005, 01:32 PM
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Default Re: 03 daytona with 525

Originally Posted by gsmith9898
how can you tell slip ratio?
RPM X Pitch X Drive Ratio X .00094697 X Slip = MPH
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