Fastest SOB hull???

[Greg G]

The Tuff 24 is 24'9" RBT, so it is too long for this particular thread. How that is "biased" is mind boggling to me. I have spread zero mis-information. I just said there are no photos of the Tuff running in rough waters so far. If you have photos please post them up, if not then I rest my case. Do you have some?

For this thread, the Tuff 21 remains at the top at 106mph. Perhaps the new Tuff will outdo it. I hope so.

Start a new thread, simple.

[Greg G]

Your bias is so painfully blatant. Add that you like to spread misinformation.
Now if anyone thinks the challenger 21 is a poor offshore boat you can stop reading here. The Tuff 24 has a deeper vee, is narrower, longer, and deeper than the 21. Add that it has a ballast tank. 110 with a 300r out of the box. Now, to be clear the chauldron is narrower and has a deeper vee, I would never pretend to think the Tuff rode like they will. But reality is NONE on the current list can touch the Tuff 24 in ANY conditions
now back to CNN

Zero bad info put forward by me. Zero. Buy a tape measure, then start a new thread

[hellbents-10]

No ballast tank in mine, but I have been out in 3-4ft waves in Lake Michigan a few times with the drive tucked in and flying. Lake Michigan is not easy to run in like the ocean either!!! I will have to get a chase boat our for some video next year for sure. I don't even have any good pics or videos of it up on the pad!!! I was simply to busy working and racing this year and when I had a chance for a rip in the Tuff I didn't get the camera crew assembled haha.

A ballast tank would be a help for sure, some day I will incorporate one.

[Greg G]

RBT back to this thread topic ...... question for you on the new Tuff 20 (or 21) do you have an idea when it will be done and go into first build ?

[Greg G]

....... The boys down under are known for pressing the envelope and testing on the race circuit. The V8 tall boy may be hurting SOB top speeds when you combine the fat gearcase and the cowl wind resistance. Only time will tell as owners get them dialed in but right now the 300XS seems a bit faster.

That would be rare for the XS to be faster. The R has about 22 more HP, 200 more operating RPM.

V8 torque is impressive. Edit: Thanks to River Rocket for providing the detailed test data below.

WavetoWave, the 300XS made 306 hp on the dyno, where are you getting the roughly 328 horsepower for the R, is there a dyno print for it out there?

[TooStroked]

V8 torque is impressive.

WavetoWave, the 300XS made 306 hp on the dyno, where are you getting the roughly 328 horsepower for the R, is there a dyno print for it out there?

A while back, somebody posted up the numbers supplied to the California Air Resources Board (CARB) for the new Mercury outboards. I don't remember the exact numbers, but 328 HP for the 300R sounds about right. From a "percentage over advertised HP" number standpoint though, the 250R was even more impressive. Anybody got those numbers?

[river rocket]

For Fastbass Marine TV videos I tested the 250R before my 300R showed up. I almost canceled my 300R order as a result. Luckily I had the opportunity to test a 300R and do some logging on it before my 300R showed up. The 300R tested completely different.

I was simply not able to get the 250R to run at the top speeds the 250XS could run at. I also didn't match the acceleration of the 250XS when comparing prop to prop. Down low it would come out very close to the 250XS (1-2 boat lengths back in a 5mph to 85mph test), but up top it falls short on the Allison XB21. Not the case for the 300R, it clearly outruns the 300XS up top and down low.

Don't get me wrong, the 250R is a great motor and it has many clear benefits over the 250XS. While it hasn't proven to pull the same acceleration numbers as the 250R or top end, it does outshine a 250XS when the boat is loaded up with gear, has two on board, and a full livewell. All things that are important to a fisherman. To date no 250R boat has passed the 250XS record top speed on an XB21.

What you don't see in any of the Fastbass Marine TV videos is all the testing that was done on the 250XS and 300XS side by side. The 250XS is an amazing motor. When I first switched to the 300XS from a 225XS I was like WTF, the 225XS with the same 1.62 case got out of the hole better with the same props. The 250XS motors down low power is incredible and puts the 300XS to shame. It is one of the reasons you see, the 1.62 to 1.75 swap, DBR tuner test, and Flywheel test on Fastbass Marine TV. I was trying to get the 300XS to launch with a 250XS. Up top the horsepower prevails but down low the 250XS was strong and left my 300XS chasing down the 250XS test boat.

Interesting to note I tried to repeat the 1.6 to 1.75 gear case test I did on the 300XS and 250XS on the 300R and the 1.6 case didn't perform well. The 1.6 case is not the right case for the 300R. We brought the results to Merc and they agreed and recommended we only use the 1.75 case on new boats going forward.

[WavetoWave]

Ya, well said river rocket. The 1.6 gears are mostly for a twin sport cat setup.

On the new V8, the 250 Pro XS and 250R are the exact same engine, so power is exactly the same. Great value there, especially if you want the TM, the DTS Pro xs is a good deal. The 250R is only a mechanical SM. Great if you want to save some money over the 300R.

I think the 250R on the right boat screams. We had a reader repower a Mirage with a 250R and I think he was running 114 MPH.

[moatorbotin]

.....
Time for someone to start a new thread, "Fastest V bottoms 25' - 27' with a Single Outboard".

I know two guys who would do a great job writing it and two boats that would be perfect to start it out

why not 25-30? ...

[WavetoWave]

Customer reports the 25 Chaudron is running 92 now, stock Bravo 30"

[river rocket]

Not to turn this into a motor thread but stay tuned to Fastbass Marine TV.

The newest 450R test boat should be running soon and we will have 450R testing on that boat and the Allison XB21 450R boat. Real data comparisons of the 450R vs the 300R. Not to mention side by side comparisons of the new Carbon Fiber LCB vs the Allison XB21. In what limited testing data I gathered the 450R is pulling hard on the Allison XB21. Crazy power and significant 5-85 and 3000ft drag test improvements. It will be interesting to see it on the data logger when we have it running well on top.

The loaded to fish XB21 300R test boat was running a best of:
5-85mph in 13.8 seconds and 1100ft(28 Promax)
5-100mph test in 24 seconds and 2235ft (32P3BC)
5-105mph test in 33 seconds and 3439ft (32 5-BLD CNC).

Best over all wheel Mercury 5 Blade CNC
5-85mph in 17 seconds and 1200ft, 5-100mph test in 26 seconds and 2442ft, 5-105mph test in 33 seconds and 3439ft Top speed 108.1

Best over all poor mans wheel 34 P4 BC
5-85mph in 18 seconds and 1232ft, 5-100mph test in 28 seconds and 2675ft, 5-105mph test in 37 seconds and 4062ft Top speed 108.1

Early indications are the 450R boat will be push us into testing the 5-110mph or the 5-115mph. All with a wheel big enough to put up those huge numbers and still beat the 300R running an under pitched 28 in the lower ranges. That is moving.

I also pulled some data on a Nizpro SHO. Really cool results as well. That video will be out soon on Fastbass Marine TV.

[JLanier571]

Can't wait to see! You do the most intricate testing in the business for the public. The numbers never lie!

[WavetoWave]

Longest thread on SF?

We did a writeup on Battle Wagon Boats building a great 21 called the Savage.

Article:
https://www.wavetowave.com/home/2021...e-and-pleasure

[TooStroked]

A while back, somebody posted up the numbers supplied to the California Air Resources Board (CARB) for the new Mercury outboards. I don't remember the exact numbers, but 328 HP for the 300R sounds about right. From a "percentage over advertised HP" number standpoint though, the 250R was even more impressive. Anybody got those numbers?

Found the post and numbers:

250R vs 300R (screamandfly.com)

300r rated at 316 hp at 6250 and 311 ftlb at 5000.

250r rated at 276 hp at 5500 and 312 ftlb at 4500.

I’d guess the 250 makes a hair more low end torque and a bit less top end power; midrange being nearly identical.

Data courtesy CARB off-road database on the junkiest fuel you can get.

[David]

LOL, the longest thread here was a guy putting a V8 OMC on a Hydrostream, the famous Filter

Longest thread on SF?

We did a writeup on Battle Wagon Boats building a great 21 called the Savage.

Article:
https://www.wavetowave.com/home/2021...e-and-pleasure