Re: Opinion On 25 Tantrum
 

hey mike i do belive it was steve who sold me that boat through thunder dan, awsome boat. rick :drink:

Re: Opinion On 25 Tantrum
 

Active Mike, I was on your boat when the Smith Bros. owned it. Of course it was febuary and the boat was in storage but that boat is sweet......So I had one built!! :D

Re: Opinion On 25 Tantrum
 

To my knowledge, the One Vision 25 Thunder was the fastest of the Factory race boats with HP500. With Our Merc labbed prop we could hold 81.4. With a 28 Bravo 4blade by John Janiky<?> from DAH ProPellers in WI. We could hit 82, but could hold a steady 81.7 with less bow lift and better handling. The boat has since been changed back to a more pleasure friendly setup, but we still ran a 78 at the Shootout last month. The motor was freshend by Tyler Crocket back in 2000. It is still stock and still has the legal APBA seals on it.
As I posted in the first of this thread, If ANYONE is in the market for a 25' to 28' foot boat, the 25 Active Thunder is the boat to beat, (if you can). Compare it to a 29 Fountain, (the 27 isn't even close) in rough water and for top speed with identical power. I keep thinking I might sell mine, but would like to step up to twins on the next one. So, I'm waiting for Pat to take a 32 with 500HP in for trade... ;)

Re: Opinion On 25 Tantrum
 

$100k, 70hrs.

Re: Opinion On 25 Tantrum
 

<in my best "ToolTime" Tim Taylor voice>
Aaaaaaaaaarrrgghh?

Re: Opinion On 25 Tantrum
 

Hello Gordo,
Thanks for the feed back. Would you recommend for me to try contacting theis DAH Propellers to have them work on my Bravo 28?
When I purchased the boat from Rstiney it had a Bravo 26 that I have no idea what was done to it. The boat liked to porpus starting around the 60 to 65 mph then go into to chine walking. After receiving my new Bravo 28 I sent my 26 with it to Mercury Racing and explained what the 26 pitch was doing and to make what ever changes they thought was best to get rid of the chine walking and porpusing. It reduced some of the chine walking but the porpusing is still there. Mercury said that they could shorting the exhaust barrel on the prop (hub) and that it would allow for more stern lift. I asked, wouldn't that scrub speed off the top end and he said that usually it adds to the top end and gives more control.
Your thoughts?
Thanks,
Mike

Re: Opinion On 25 Tantrum
 

Mike,
I tried a 26 Bravo on my boat a couple of times looking for a rough water race prop. Never could get the performance out of a 26 for some reason. IN fact, out favorite rough water prop was a 25-26 Hydromotive Q-IV that Brad owned. Not the top speed as the 28 Bravo but handled better in big water with great acceleration.
As for porpoising and chine walking, the only time mine wants to porpoise is in flat calm (glass) water. The boats HATES it. But, With a little chop under you the boat flattens right out. You need a good 10" ripple to 1' whitecaps before the boat really comes to life. Since I don't do much boating on the Lake of the Ozarks at 7:00 AM, glass water isn't much of a problem. I do start to chine walk at around 72-74, but it's pretty minimal and I can easily drive through it and control it. When it ran in the low 80mph range it was a little more pronounced but still easily controlled once you learned the boat. Never has it been as bad as some of the Velocitys I've raced and driven. For your situation my first question would be to make sure you don't have any air in your system, (steering rams or helm). Also look for any loose fittings or linkage on your steering rams.
As for what John and the gang at DAH Propeller, I would say what ever you want they can do. It helps alot if you have exact numbers such as GPS or radar top speed, RPM at top speed and cruise speed, air and water temp at those speeds, handling at top speed, how the boat comes on plane with current prop, etc.
Let me know what you do and the results you get.
Good Luck,
Gordo

Re: Opinion On 25 Tantrum
 

Hey guys, Just for $hits and giggles my 1999 Tantrum with a 502 mag with pipes and K&N filter.......26 Bravo 4 blade with some minor work done to it (took some pitch away and balanced it (no Labbing) at Murphys Prop in Norfolk , Va.) the boat runs just at 70 with 1/4 tank and me on the boat with a nice 1-2 ft chop. I've seen the GPS flash 71.4 a couple of times.......Not lately though!!! Boat has a full cabin with a sink (empty tank :D )

I've never noticed any porpoising in any water, now chine walkin' thats a different story......too much trim and a good ole cross wake sets it into motion. Drop the drive a click or two and she settles right down!!!


Did I mention I love this boat!!!? :D

Re: Opinion On 25 Tantrum
 

Gordo / R Addiction thanks for the input.
Gordo,
No problems with my steering system, all in good shape.
On DAH Propellers I just thought that they may of had some thing to add working with you on your prop and my boat being similar. You know as well as I do how the prop game can go. Was your prop labbed (28 Bravo)? Did you have anything done special that may be reducing your porpoising with your prop that may help me?

Thanks in advance for the help,
Mike

Re: Opinion On 25 Tantrum
 

Good Luck Mike :cool:

Re: Opinion On 25 Tantrum
 

R Addiction,
Thanks again. Always trying to get a little more out of it.
With the price of fuel I figured the faster that I can get there the less fuel I will use, ha, ha.

Mike

Re: Opinion On 25 Tantrum
 

I can run all weekend on 65 gals. if I keep out of it :rolleyes: :D ......This is cruising at 50-53 mph at 3600RPM. :D

Re: Opinion On 25 Tantrum
 

hey mike dont forget the faster you get there the more beer you can drink :drink:

Re: Opinion On 25 Tantrum
 

Mike,
There was some "dialing in" with my prop that DAH did at no extra cost. When you send your prop in tell John you talked to me and have the same boat/motor as mine. Nothing was done specificaly to reduce porpoising. In fact, I really don't have that problem with any of my props as long as I'm in good chop.
Good Luck
Mike "Gordo" Gordon
ONE VISION Racing

Re: Opinion On 25 Tantrum
 

R Addiction,
That goes the same for me on the gas. Boy but let me tell you if you lay into it you can put a dent in it in a hurry.

Active,
Mike

Re: Opinion On 25 Tantrum
 

Rssteiny,
That is really what I meant. The more you drink the less you worry about the gas.
Did you check out your tire rack yet?

Re: Opinion On 25 Tantrum
 

Gordo,
Would you have a number for me to contact John at DAH?

Thanks in advance for the help,
Mike

Re: Opinion On 25 Tantrum
 

Gordo.
Rsstieny brought up a thought. When my boat was built for the Smith Brothers and an extension box was placed on it I wonder if they changed the X dimension. Could you tell me what yours is?
Mine no longer runs the box.
What is the proper way to measure the X dimension?
From the bottom of the transom plate to the front point of the lower gear housing correct? Or is it from the lowest point on the transom to the front point of the lower gearing housing?
Or neither?

Thanks,
Mike

Re: Opinion On 25 Tantrum
 

Sorry I've not been online for a while. I'm on duty the next 48 hrs. I'll get the number to DAH when I get back to the shop.
Mike,
Mine came without a box. We installed one in 2000 and tried a number of variations, (drive heights) and props. When all was said and done I finally got back up to 81 but control and handling was UGLY. In fact, now that you mention it, it did porpoise a little with the box with certain props. I would have to go back to measure, but I'm thinking my X was around 19". When I get back to the shop I'll measure it.

Re: Opinion On 25 Tantrum
 

Gordo,
Give me a shout when you get the information, I'd appreciate it. Make sure to clarify how exactly to measure my X so I'm getting the right comparison.
Thanks,
Mike

Re: Opinion On 25 Tantrum
 

Sorry gang, trying to keep up, and not doing it very well lately.
Anyway, Call John Janaky
DAH Pro-pellers
34111 Washington Ave.
Burlington, WI. 53015

Measure the X by measuring from the pivot point on the transom assembly down to the lowest point of the keel in the center of the transom.
For approx. numbers, 14" to 15" is pretty standard for recreational boats, with most race boats and high end performance stuff up around 19 or so.
(APBA Factory 1 rules had a limit of 19" for step bottom boats and 19.5" for straight bottoms like the 25 Thunder).
I'll measure mine as soon as I get a chance.

Re: Opinion On 25 Tantrum
 

Thanks Gordo for the info. I'll wait to hear from you.
Mike

Re: Opinion On 25 Tantrum
 

Hey Gordo,
Was wondering if you had a chance to make it to your boat to get the X dimension measurement ?
Also wanted to clarify something with you. When measuring the X-dimension it is taking from the pivot point of the lower unit. which pivot point the up and down or the left to right?
I couldn't seem to get a number in the range that you gave me so I want to confirm.

Thanks,
Mike

Re: Opinion On 25 Tantrum
 

Sorry for responding late Mike, been busy preparing for and recovering from Hurricane Wilma...Seems like Gordo has jumped in and answered many questions. A bone stock 25 with an Hp 500/bravo will run upper 70's all day long. Tweaked with the right X-dimension and prop you may get over 80 mph which is great for a 24 degree hull that measures 24'6" down the center line!! The greatest thing is the mid range accelleration in that boat when powered by the Hp 500 carb or efi. The boat is very throttle responsive and a joy to drive.

Re: Opinion On 25 Tantrum
 

Jupiter Pulsare,
I wish you luck with your rebuilding from Hurricane Wilma.
What kind of props do you think worked best on the tantrum with the 500HP?
Thanks in advance,
Mike

Re: Opinion On 25 Tantrum
 

HEY MIKE WHATS NEW, DONT FORGET THAT HERE IN PA WE ARE 3/4 MPH SLOWER THAN RUNNING AT SEA LEVEL IN THE SALT. I THINK AT 74 /75 YOUR ABOUT AT THE MAX W/ YOUR SET UP. WHEN I BOUGHT THAT BOAT FROM THUNDERDAN HE TOLD ME #S I NEVER SEEN UP HERE IN PA AND HE RAN IN THE SALT AT SEA LEVEL. ALSO MY 32 AUDACITY WENT 91 IN THE SALT AND BEST I EVER SEEN AROUND HERE IS 87.

32 THUNDER RICK :drink:

Re: Opinion On 25 Tantrum
 

Hey Mike, if I remember correctly (??), we were swinging a Bravo one 26, Lab finishing will give you an extra 2 mph at wot. By the way, Thunder Rick is correct. The boat will run faster in the salt water (more bouyancy) and at sea level (more oxygen to feed those hungry cylinders). Pat could give you better feedback on prop choice....he's got more seat time in that boat than anyone. The reality of a 25' Tantrum is that when the water gets snotty, that boat will crush it's way through and leave other similar sized boats in it's wake!!

Re: Opinion On 25 Tantrum
 

You are sooo right Steve!!! I've lost more pairs of sunglasses turning my head to see how far back everybody is!!! :D
How are ya by the way? :D

Re: Opinion On 25 Tantrum
 

I'm great!! The boating in Jupiter, FL is so much better than Ft Lauderdale. No where's near as crowded and lots of places to hook up with other people. No seawalls!!, just nice sandy beaches along the intercoastal and some great sandbars to hang out at! The performance boaters in the area lean more towards smaller outboard powered boats than offshore I/O's and some of them take it to the extreme!! I've seen guys running 20' STV's and Allisons at over 100 mph GPS and they still want to go faster!!! It's one thing to run that fast in a boat over 35' but it's entirely another feeling when the boat is only 20' long!!! We do have a few Offshore boats running around. Seen a couple TS TopGuns, A ridiculous Outerlimits, a Skater with tripple 300x's, a Fountain now and then but no Active Thunders. Pat may have to "loan" me one some weekend so I can rattle some cages! LOL (Then again, He'll tell me to buy one!) LOL Steve

Re: Opinion On 25 Tantrum
 

Rick,
All is good here. I'm just trying to dot my I's and cross my t's with the boat. I still want to try to dial the porpoising out if I can.
I'll have to keep digging on the prop issue.
Be good.

Re: Opinion On 25 Tantrum
 

Jupiter Pulsare,
The boat had a 26 on it when I purchased it. 74 was my best. I purchased a 28 had Mercury Racing lab it and they reduced the outer dia from 15 1/4 to 14 3/4. It seemed to reduce some of my porpoising and chine walking and I seen about 1 more mph. Rpms are hitting 5250 with the 28 Bravo 1.
Thanks for the feed back.
Mike

Re: Opinion On 25 Tantrum
 

Hey, Mike you may want to have the 26 Lab finished, Have them put some more cup in the 26 if you're hitting the rev limiters...sometimes, trying to swing too large a diameter prop or too much cup will induce chine walking in a single screw boat. Our smaller, lighter, outboard powered boats are more prone to that than the I/O offshore boats. Also, keeping everything in the boat centered and low will help alleviate chinewalking. When your flying along at WOT the boat wants to ride up on the very bottom of the keel, at the same time the torque from the prop is trying to tip the boat to one side....it's a balancing act that can be countered partially in the way you steer and trim the boat, too much trim and the boat will dance like crazy, tuck the nose down a little, get back on the throttle, and maybe drop the tab on the side that keeps falling off (just a little) (if you have tabs??) and you should see improvement.....If you think it's hard in a deep V boat...try it with a padded keel....at over 72 mph I get white knuckled in my 21' Checkmate Pulsare/merc 225 Xri just trying to keep in on the pad.....makes for fun, challenging driving!!!! Steve E

Re: Opinion On 25 Tantrum
 

Jupiter Pulsar,
When I run the 26 which I think was lab I have more chine walking and more porpoising. RPM's are running right at 5300. Do you think that I should go back to the 26 from the 28 that is on it and do some more work on it? I realize that it's called the prop game which I will continue doing if I need to. My biggest issue is trying to reduce the porpoising of the boat if it is possible thur the prop.
Thanks,
Mike

Re: Opinion On 25 Tantrum
 

Hey Mike, sometimes finding a good prop will help in handling and reduce chine walking. Also x-dimension plays a big role..if your drive is buried deep in the water the boat will want to chine walk; you could try an imco shorty or xr drive (which I think is shorter, Pat would know as I've not been involved with up to date Merc info since getting out of offshore boats). You may also want to try a 3 blade prop..I would reccommend a Merc Tempest plus 27. Great prop for top end numbers. It's a never ending battle of trial and error when dialing in a boat. Good luck!! SteveE

Re: Opinion On 25 Tantrum
 

Steve,
Thanks for the input. I will continue with the prop game to see where It will take me and go from there.
Thanks again for the help.
Mike

Re: Opinion On 25 Tantrum
 

Ttt

Re: Opinion On 25 Tantrum
 

what's with all the 25 threads comin back, some one buyin:D

Re: Opinion On 25 Tantrum
 

I had a call from a guy in Long Island that is looking for a 25. I told him to come over here and talk to you hooligans for the straight poop.

Anyone want to start a new list is 25's available :drink:

Re: Opinion On 25 Tantrum
 

Nothin but postive things from me but only got about 6hrs on it before I had to winterize............c'mon spring:D

Re: Opinion On 25 Tantrum
 

Heard that Camp.....is it April yet?:evilb: