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Old 26-12-2011, 09:27 PM   #1
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Country: Norway
Boat make: Phantom 25
Engines: Verado 350 Sci

Join Date: Mar 2008
Posts: 38
Phantom 25 2011 project

Hi

Last year at this time I decided to sell my two Merc 2.5 EFI SS engines. The new engine I bought is a Verado 350 sci. The engine has suprised me very much in a positive way; great punch and excellent to use. Its heavy, but my Phantom 25 likes weight aft rather than using setback, so balance is now spot on. According to Steve Baker my Phantom 25 is heavier than a normal 25. I do not know why, but I think it was made for endurance offshore racing. I use a Stainless Marine 4,25 inch hydraulic jackplate. Works great.

I managed to get the boat finished by July the 1st, and I have done some few prop tests. Best speed has been 80 mph at 6,500 rpms with 1:75 gears using a Rev4 25 pich prop. The gearcase of 350 sci has a larger diameter than a standard Torquemaster, so the clue is to get it out of water as musch as possible. The tube of the REV4 is stock, so shorten it will normally give another mph. I will test out a BBlades 4bl Blaster next summer. 82 mph is absolutely within reach.

You can check out some videos on flat water at www.vimeo.com. Search for Toffen Phantom.

Fuel consumption is 32 litre at 3,500 rpms and 44 mph, 41 litre at 4,000 rpms and 49 mph. And 73 litre at 5,000 rpms and 63 mph. When I had a Promax 300 SVS (Brucato intake and ECU) I used 55 litre at 4,000 rpms and 50 mph. Top speed with the PM 300 SVS was 76 mph on a good day. Normally 74-75 mph.

Happy New Year!

Cheers, Toffen
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Old 26-12-2011, 09:45 PM   #2
Too many projects.....
 
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Country: UK
Location: Warsash
Occupation: Sunseeker Sales @ Swanwick
Interests: Making things go fast....
Boat name: Top Gun
Boat make: Sunseeker Hawk 27
Engines: 2x Volvo Penta 5.7 V8s
Cruising area: South Coast

Join Date: Sep 2007
Location: Warsash
Posts: 220
That's a great result, you must be really pleased to keep the performance but half the fuel cost of twins and added benefit of no fumes, fly by wire controls etc.

Out of interest how have you found the fly by wire throttle, is it on a hand control or foot throttle?
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Old 26-12-2011, 09:57 PM   #3
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Country: Norway
Boat make: Phantom 25
Engines: Verado 350 Sci

Join Date: Mar 2008
Posts: 38
Phantom 25 2011 project

Hi,

I use a foottrottle linked to a hand control DTS. So I can choose to use the hand control only or the foottrottle, and gear with the handtrottle. The latter is a perfect match. You can adjust the sensitivity of the gearshift, but stock its working great. A little testing first after 6 years with twins though!

The milage suprised me big time. Although the Brucato PCU did wonders with the Merc 2.5 EFI's. However, no oil no more. I paid almost 20 GBP per litre, and used almost 3 litre per hour.... So now my fuel costs correspond approx. to the oil cost ...

Cheeers, Toffen
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Old 27-12-2011, 08:24 PM   #4
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Country: Guernsey
Occupation: Engineering
Boat make: None, boo!
Engines: Turbines mainly!
Cruising area: The inside of my workshop!

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Posts: 2,644
Fantastic!! The Phantom looks great with the big verado on the back!
I sometimes get to use a 28' rib with a 350SCI on the back. Although the owner is having a few issues with the motor, mainly the throttle response, the power is amazing!!
Makes me want one (or two ) for the back of the Revenger!!

Did you get a good price? I know the one I use cost a fortune!!

James
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Old 27-12-2011, 11:37 PM   #5
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Country: Norway
Boat make: Phantom 25
Engines: Verado 350 Sci

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Posts: 38
Phantom 25 2011 project

Hi,

Thanks

The only issue I have had is a fault code due to a battery issue. The engine or more correct, the DTS is very sensitive to battery / electrical faults. So you have to wire the electrical according to the book, and use a reccommended battery.

Outboards in Norway are very expensive indeed in Norway, as most things are

Cheeers, Toffen
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Old 28-12-2011, 08:48 AM   #6
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Country: uk
Location: salcombe
Occupation: semi retired
Interests: racing(middle east class 3 6l)
Boat name: still no worries
Boat make: phantom18
Engines: 2.5 efi
Cruising area: salcombe

Join Date: Dec 2007
Location: salcombe
Posts: 499
Top speed

Hi
How fast was your 25 with twin 2.5efis (280) ?
Thanks
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Old 28-12-2011, 09:28 AM   #7
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Country: UK
Location: Portsmouth
Occupation: Marine Engineer
Interests: everything fast
Boat make: Phantom 28/phantom 18
Engines: 2x Mercury 3.0 225 optimax/yamaha 85
Cruising area: Solent

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Posts: 1,308
Talking p25

i think that boat ran 88mph with twin 2.5 280s on it
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Old 28-12-2011, 09:44 AM   #8
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Country: uk
Location: salcombe
Occupation: semi retired
Interests: racing(middle east class 3 6l)
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Boat make: phantom18
Engines: 2.5 efi
Cruising area: salcombe

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Top speed

When blacker had the 28 batboat it ran 105 mph so I thought it would be a bit faster than that
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Old 28-12-2011, 09:49 AM   #9
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Country: UK
Location: Portsmouth
Occupation: Marine Engineer
Interests: everything fast
Boat make: Phantom 28/phantom 18
Engines: 2x Mercury 3.0 225 optimax/yamaha 85
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The Bat-boat will run better than that. It's a lot more efficient hull than the phantom, a P25 Kevlar hull with twin 2.5 280s ran 95mph, so its about right 88-90 tops.
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Old 28-12-2011, 10:06 AM   #10
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Smile Nice Phantom

Hey, I like everything about these videos
Your phantoms awesome
The catatamaran looks pretty crazy twin 300s ??
And I've not watched a better quality video like that what sort is it please
I don't have to much knowledge on them but as I said it's awesome!
I want one
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Old 28-12-2011, 10:19 AM   #11
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Country: Norway
Boat make: Phantom 25
Engines: Verado 350 Sci

Join Date: Mar 2008
Posts: 38
Phantom 25 project

Hi,

The boat ran 88 mph on a good day and 86 mph on a average summer day. The boat weights in at 1650 lbs eq 750 kilo without engine and fuel. Thats 115 kg more than a standard 25. According to Steve Baker it was made heavier than a standard hull. The Bat 28 hull is a steppped notched hull.

As the construction is 30 years old I think the results are pretty good. If we compare the phantom 25 to a hydrolift 24 r with 425 hp v 8 inboard, it goes 5-6 knots faster with 350 hp engine. And the hydrolift is a new construction with steps and notched transom.

However, a us phantom 30 feet with 2 x 300 xs engines runs 100 mph! One step air ventilated hull.

Cheers, Toffen
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Old 28-12-2011, 03:15 PM   #12
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Country: Norway
Boat make: Phantom 25
Engines: Verado 350 Sci

Join Date: Mar 2008
Posts: 38
Phantom 25 2011 project

Hi,

The Verado 350 sci is equipped with a 5,44 diameter lower unit. A 300 Verado can choose between a standard lower unit with 4,77 diameter and a HD lower unit like mine. This is due to failures with the standard lower unit if driving offshore too hard.

When they tested the Verado 350 sci in the beginning, they used a standard 4,77 dia lower unit. It was reportly 3-4 mph faster than with the HD unit. So the easiest way to get more speed is tou buy a 4,77 diameter lowerunit since its bolt on. And use the HD unit as spare.

When I had a Promax 300 SVS I used a Torquemaster lower unit with same gear ratio. At cruise speed the TM lower unit had 3% less slip due to its smaller design. So the HD unit steal speed, but its made like a tank

I will not do it until my warranty is expired, but will look at the option then
85 mph should be within reach if so.

Cheeers, Toffen
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Old 22-07-2012, 10:08 PM   #13
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Country: Norway
Boat make: Phantom 25
Engines: Verado 350 Sci

Join Date: Mar 2008
Posts: 38
Smile Prop holding water?

Hi!

I hope you are well

Last year the best speed was 79,8 mph with a labbed Rev4 prop 25 pitch at 6,500 rpms. I have shortened the tube 30 mm, and the boat now consistently runs 81 mph at 6,500 rpms (less slip). 79 mph with 4 persons and 1/2 fuel. Best speed been 83,8 mph, although I beleive it was a GPS glitch. I have seen 82 mph a couple of times at 6,600 rpms.

The best prop so far has been a labbed Rev4 25 pitch. I have tried a Tempest A45 25 pitch, but it did not like to be run as high as Rev4. Top speed 78 mph. A labbed Mirage Plus 25 the same. It lost the grip of water easily.

I have lots of waterpressure. The prop loose bite before I loose waterpressure. And since the Verado 350 sci use a 5,44 diameter gearcase as opposed to a standard case being 4,77 dia, the major point is to get it out of the water.

I will order a BBlades Blaster 4bl over the hub prop this month, but I wonder how the new Bravo FS will work out? It has a bigger diameter than the Rev4, and with the shortened tube it should give good lift too.

Any ideas?

Thanks!

Cheeers, Toffen
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