03 daytona with 525
 

I'm looking at buying a 2003 daytona with a stock 525. What speeds can I expect and what upgrades do you recommend. Ideas anyone? prop?

Re: 03 daytona with 525
 

what size daytona

Re: 03 daytona with 525
 

2003 26 foot daytona. 525 efi with 40 hours. bravo xz with ITS. it has a 26 bravo 4 blade prop now.

Re: 03 daytona with 525
 

yo will be luck to see 65-70 tops out of that motor

Re: 03 daytona with 525
 

i rode in a 27 w/ a 496 HO that went 68......

Re: 03 daytona with 525
 

75 to 80 mph!!! :D

Re: 03 daytona with 525
 

I was hoping to see 85, 86 mph. What upgrades is there ? It is still under 1 year warranty so I don't want to go into the blue motor yet. What prop do you suggest? What do you think of the ITS system?

Re: 03 daytona with 525
 

I'd say 80-82 mph and go with a 5 blade prop like the p5x.

Re: 03 daytona with 525
 

What pitch prop would you try? It came from eliminator with a 26 bravo.

Re: 03 daytona with 525
 

26 Bravo=25 p5x possibly a 26 p5x.

Re: 03 daytona with 525
 

I don't know how a p5x works on a 26 but we tried a few on a 25 with a 500efi and the p5x was terrible. Blew out, slow to plane and lost cruise and top end when replaceing a 28 bravo. As for the 26 , what gear ratio?

Re: 03 daytona with 525
 

its a stock xz drive.

Re: 03 daytona with 525
 

Is it a cat or v-bottom.I have a 03 26' cat with a 525 and a 28 pitchprop.runs mid 80's all day.FOR SALE in the classifieds.

Re: 03 daytona with 525
 

How Much And Have You Done Anything To It?

Re: 03 daytona with 525
 

I just bought the boat. My first time to drive a cat. WOW !!!!! What a ride compared to my baja. Need some help with where to mount the depth finder sending unit. This boat don't have one and I don't want to drill a hole in the boat.

Re: 03 daytona with 525
 

gsmith9898 - Welcome to the Eliminator Club!!!! WOW is usually the reaction of a first time cat owner.

I had a chance to see a brand new 05 Daytona 26 with a 525, and a 28 pitch factory 4 blade prop this weekend at LOTO. The boat was being delivered by Midwest Performance in Omaha NE, and the driver was Marty of that dealership, so he is better a getting the needed top speed!!! Needless to say the recall on the GPS was 84, brand new out of the box.

You will love the boat.....Enjoy the envy of the v-bottom owners.

Re: 03 daytona with 525
 

I test drove the boat when I boaght it and it went to 81 mph with three of us and felt like it could go some more. It has 1.35 gears and a 26 4 blade bravo prop. was not close the rev limiter so do I try a 28 prop or stay with the 26?

Re: 03 daytona with 525
 

If I'm understanding you right, the boat was not close to the rev limiter? What top rpm did you get? You wouldn't want to go to a 28p prop if you can't reach the rev limiter with a 26.

Re: 03 daytona with 525
 

We did not hit the rev limiter. I think we got to about 5000 rpm. So you think go down to a 25 or 24 pitch prop?

Re: 03 daytona with 525
 

I would say it sounds like you are close with what you have. The true test if you are looking for top speed only would be to have just you in the boat, minimal gear (coolers, etc.), and have maybe 1/4 tank of fuel. Of course I would also say that if the boat/engine is brand new...it will loosen up a bit once you get some hours on it.

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.

Re: 03 daytona with 525
 

is a lab finished prop worth the moneyY

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.

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. :D

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.

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.

Re: 03 daytona with 525
 

how can you tell slip ratio?

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

Re: 03 daytona with 525
 

Here's another one: http://www.hillpropellers.com/propcalc.html

Re: 03 daytona with 525
 

RPM X Pitch X Drive Ratio X .00094697 X Slip = MPH

Re: 03 daytona with 525
 

Time To Burn....I don't think your formula is correct based on my math:

5300RPM*28P*1.5*.00094697*.10=21.07MPH? I sure hope not!

Perhaps I am missing a decimal point in that calc. somewhere or not using the correct number?

Re: 03 daytona with 525
 

You're missing a decimal, it should be 210.7 mph...... :D

Re: 03 daytona with 525
 

If my theoretical is 210.7MPH then that means that my slip is about 40%? ;) :drink:

Re: 03 daytona with 525
 

5300 X 28 P X .67 (1.5 Gear Ratio) X .00094697 X .90 (10% slip) = 84.739 MPH

You must figure the gear ratio into an decimal number and also for slip take % of 100.

Hope this help!

Re: 03 daytona with 525
 

The caculation basically determines the props or boat distances of travel in one rotation... so when you times these number together the explaination is to prove that the slip is extra critical.
For example:

At
5% (.95) you see 89 mph!!!!!!!!!!!!!!!!!!!!!!!!! (which is hard to get).
15% slip (.85) you see 80 mph! (Do not get discouraged- this is a great percentage for a single engine Cat.) The SLIP IS BETTER ON CATS, than V-bottom.

OF COURSE there are many factors to determine a boat speed... this only gives you a hypothetical rate or explanation of HOW FAST THE BOAT CAN GO... I look at slip as the drivers comfort and ability to drive a boat fast SAFELY. Have fun with these numbers.

Re: 03 daytona with 525
 

Great dialog. My slip percentage on a V-Bottom according to the given mathematical formulas is 13%. That is calculating my actual top speed using a hand held GPS. Here are the specs: 23 pitch, 5150 RPM, 1.5 gear ratio, 74.7 theoretical speed, 65mph actual speed. That is 13% slip on a semi-performance V-bottom. How does that compare to the Eliminator Daytonas as far as slip percentages? Looking at cats, not yet sold on the design.

Re: 03 daytona with 525
 

Slip is somewhat high on a cat until it starts packing air, which will happen at around 70-75 mph. 8-10% slippage is good on a cat.

Re: 03 daytona with 525
 

Yes... The props efficieny is extremely proficient once the boat is on plan.

ALL VBottom have a higher SLIP ratio than CATS, but 13% is excellent for a Vbottom.

Re: 03 daytona with 525
 

My 25 daytona runs around 12 percent slip with a bravo and 13 percent with a black hawk at 5200 but runs 6 % at 4000 and 26% at 4000 respectively,
9% at 3000 and 34% at 3000.
Speeds for each drive at 3000 rpm = bravo 50, bh 40 mph
4000 bravo= 70, bh = 60 mph
5200 bravo = 83, bh = 91
As you can see, once the hull starts packin air, the slip numbers fall really fast for the bh drive as the boat rocks back over the step in the hull. The bravo can be forced to this ride attitude with positive trim so the slip stays low no matter what speed whereas the bh needs forward speed to pack air and lift the bow to get the slip down. At 2500 rpm. the bh drive has nearly 45 % slip. Really only a top speed drive setup.

Re: 03 daytona with 525
 

It would appear that the basic combo for a 25 or 26 daytona is a 1.50 gear set with a 28 prop or a 1.36 gear set with a 26 prop. Seems to be the standard combos I have seen out there. 1.50 may be a little quicker getting to the top but the 136 has better cruise and top end speeds.

1.36:1 spinning 26" at 5200 at 10% slip =86.29 mph
1.50:1 spinning 28" at 5200 at 10% slip =84.03mph.