speed 25 daytona
 

I just dynoed 509 bbc 628 hp 600 fpt. This weekend were installing It into my 25' daytona bravo one 1.5. Need help with prop and estimated speed

Wont really matter much unless you upgrade to a XR drive at least. That bravo will be lucky to make it past prop testing.

I must be very lucky. My buddie is running 540/620 for 2 years on a 25 sunsation, with a bravo one 1.5/28 lab finish @5500 . and I had a 28 donzi also power by 540/580 ran that for 4 years ( got to go easy)thay last!

i would try a 30 pitch bravo one four blade , should put you in the mid 90s

My former 25 Daytona was running 650 hp thru a Bravo for 7 years, without a single problem. I was spinning a labbed 32 pitch, Bravo 4 blade, and the boat would run consistantly between 95 to 98 mph. Wish I never got rid of it.:traurig001:

with a 1.5 gear, I would try a 32. Mine stock with w 500efi and a 28 B1 would pull 5200rpm so I think with an extra 150 hp, you should be able to pull a 32.

I would try a 30 or 32. I bet you end up with a labbed 32 or stock 30. I have a friend with a quad rotor motor putting out over 1000hp in his his 25 foot daytona and his stock b1 handles it just fine. Its all about the drive habits and weight.

Thanks for that, love to here them numbers

thanks guys I'll keep you posted

I have a 25' Daytona with a 572 NA motor 730hp and a Bravo XR spinning a 28p prop I see just under 100. I like to be able to ease it out of the hole. A big prop 30 + is going to be slow out of the hole but fast on the top end...

I ran a 28 pitch 4 blade on a 1.36 ratio drive on my 25 with around 620hp for reference.

[QUOTE=QWKRN U;2758421]I ran a 28 pitch 4 blade on a 1.36 ratio drive on my 25 with around 620hp for reference.[/QUO tell us your top speed,and how is she getting on plain

[QUOTE=vendetta;2758454]boat has seen 104 on the gps once and normally 96-98, came out the hole just fine. Mid range punch was incredible. Most of my drive issues were related to the lake I used the boat on. LOTO.

Ive since sold it and moved on the 30 I have now.

my 25 had a 555 blown 950+hp with b1 drive 1:50. high x and 31p5x prop. at 6800rpms i was at 118mph gps. hope this helps.
has anyone seen a red with grey scallop 25 daytona? i miss that boat.

do you remember were the x's was set

i used to own a 26 with a 800 hp bbc ,1.5 gears, xr upper imco lower, 34 b1 110 mph, never had a problem with outdrive, everyone said i would, its all about easin it on plane .

Easing on plane AND minimize high speed prop surfacing. I have always eased on plane, but run in the rough lake Ontario snot - very difficult to get off the throttles quick enough in the snot when one side wiggles out of the water - much easier if we were running in predictable swells or flat water.

Unfortunately, I burned through 3 XR style drives this summer -but they were IMCO - they were replaced with Teagues late in the year - that combined with me taking it a bit easier on rougher days - and my drive oil changes have been clean and green since.

Very true about the holeshot, I added the large Dana tabs to my 25, which helped immensely. Oh, I was running a 2 inch shorter lower also.

My old Daytona, anybody seen it, I was told it went to Michigan.

This was also the issue with my old 25. LOTO and its washing machine is one place that will find a boats weak spot quickly.

was it a hp bravo,also what prop were you using

No, it was a standard Bravo, and it was pushing a labbed 32 pitch 4 blade Bravo prop.

I have a 25' eliminator with a 800 hp 632 spinning a labbed 30 pitch and an imco extreme drive with 136 gears. I have seen 110 with 4 adults in the boat.

well today I ran the boat , not good. First thing eng temp never went over 140, needed 180 .( alum heads) So I Did'n make the true power.Also ran 30 pitch bravo one @top rpm 4750 /79 mpI:mad::mad: Ill be back

I have a 25 Daytona 600 cu in super charged Imco Extreme drive, 1800 hp, 32 pitch prop, 7400 rpm = 148.7 mph with 11 lbs boost. That makes it the fastest Daytona in the world!!

Anybody considering drive upgrades, Imco Extreme is the way to go! No problems, been running drive for 7 years, pull drive down and inspect every year prior to start of season and all parts are A-OK.

It is also For Sale!!

You had better luck than me. I smoked 3 IMCO Extremes in one season..was running 5 blade labbed props though and in Lake Ontario snot most of the time with a high xdim and was surfacing props...so I'm sure some of challenges I had with their product were due to the driver and the conditions...been running Teagues with 4 blade props for the latter part of the season without any issues. Like with the Imco - changing drive oil every 20 hours - however with the Teagues/4 blade prop been seeing nothing but clean and green oil changes....phew!

The fact that you've had that kind of success pumping that kind of HP through those drives is amazing. Wow!

post some photos

Ok today she ran great , 28 lab bravo one 180 eng temp, 240 oil 5150 rpm's 85. 6 mpi gps. I could live with that. Going back out tomorrow and going to try a 26 bravo one

little prop tunning on the 28 5400/91 mpi. Is it true that the bow riders are 5 mpi slower because of the extra lbs up front

That's fast, I would like to see it run.

I have a video its 7.5 mb need to be 1.91 mb. I have no idea what to do to post the video,s

hey sean Ive seen that boat its sitting in my garage Ive had it for 3 years now an still love it

I also have a 25 Daytona and am having problems figuring it out. It won't go over 78 mph and I've been through every prop from 28 to 34 Lab/no lab. In searching OSO it seems like your Daytona is very close to mine so can I pick your brain a bit? 25 daytona bowrider 620HP 540BBC 1.5 bravo. Stock 28P Bravo1 prop runs 78 mph @ 5200 rpm, Labbed 30 runs 78 mph @ 5300 rpm, Labbed 34 runs 76mph @ 4700 rpm. There must be a problem with the X dimension, with the drive all the way down the center of the prop is about even with the bottom of the sponsens, should the X dimention be measured with the drive trim raised to the max speed trim level?
Thanks! :drink:

Frank it should be measured at neutral trim.That is with the propshaft level with the running surface of the hull.Easy to do with a straight edge and another person.
My 27 runs best with the shaft level with the bottom of the sponsons.
Remember the old rule,15-20hp to gain 1 mph.
I rode in a 25 with a 496ho 425hp.It topped out at 70.Wouldn't budge over it.If you calculate it out,you are'nt far off.
If the propshaft is level with the bottom of the sponsons and your in your correct rev range you are done.It's then down to props and fiddly bits.
I believe these cats run fastest the higher you can get that drive up and still maintain driveability.Meaning still be able to get it out of the water.
Without my bolt on manufactured cav plate mine won't get out.Hope this helps.

should put a black hawk on thne u will see some mph to hp just playin i run one fast but can be a pain in your ass an no props for them

blackhawk
 

That's absolutely hillarious!!!! I just came to the same conclusion and PMd ya before I saw you that you chimed in on this post Neil.

Turns out I was wrong about the X dimension, after measuring properly instead of "eyeballing it" I'm 4.5" low (below the sponsens). That's gotta be worth 12mph!

As I understand it a Blackhawk mounted in the same hole would be 7 inches higher than a Bravo 1 ??? A Blackhawk is supposed to be installed 3" above the bottom of the sponsens so it seemed like the Blackhawk is my solution. Now comes the problem....

Not many blackhawks around and the few I've found are 4 grand plus, now try and find props at 1 to 2 grand a set, add in the reliability issues and the Imco shorty looks a lot more attractive. I wish I had the stupid play money from a few years ago to get both and compare. Any smokin deals on a blackhawk you're aware of? By the way I check with my prop guy today and he has a set of 29 blackhawk props he's had laying around for 8+ years, he wants 1500, I see you've been searching for a set :drink:

yeah your right ther is a guy on hear selling a BH with all three sets of props that wear avalible for it i think he wants 7k for it i am having my BH update with brovo X gears right now its a little better but my up was alittle worn out so getting parts for them are no prb but the prop thing will bust your ass i am runing 22 daytona 509 with dynoed 560 hp real mild build with 29 or 31 props its over the 100mph zone

I saw the ad for 7K on OSO but cannot justify spending 1/2 that for a Blackhawk. You know of any BH drivesout there under 3K?
If you're looking for a set of 29s call Richard at The Propeller Company in Lake Havasu City.

i hear that i was going to sell mine off my 22 at one an i started it at 3500 i just got 29 for it yesterday so now i need 31

Looks like the boat a buddy bought 2-3 years ago had 454 m-1 with bravo-1 now has 540 m-3 i think he's having a drive built right now...very nice boat...and should scoot even better now...runs it in west Michigan.