Vipermax engine options

[Downhilldai]

Originally Posted by Hightower

I'm not comparing anything! I'm saying that it takes quite a bit more engine HP to get a Vipermax going.

Err, no. you said this:

Originally Posted by Hightower

This is because obviously the Vipermax has a very deep V

which is misleading.

Originally Posted by Hightower

I have no rating plate on my hull.

That's odd (illegal?) for a boat manufactured in 2007.

Are you suggesting the absence of a CE plate means you can fit any hp motor that you choose?

Originally Posted by Hightower

I was told it would accept a 200hp unit

Who told you this?

Originally Posted by Hightower

....they knew of a 5.8m with a 225 honda on the back.

I know of a SR4.7 (rated to 70hp max), which was fitted with a 90hp. Doesn't make it right, though.

Originally Posted by Hightower

.. but doesn't seem to affect my handling at all.

Have you been onboard a 6.2 with a 150hp longshaft motor, to give you something on relatively even terms to compare it with?

[bedajim]

Originally Posted by Hightower

But they don't do Transom mounted "CE rated" plates, do they? All I have on mine is a serial number.

Andy mines got a CE plate too!

As I went for the maximum rated hp I had the transom knee fitted as the cost is minimal

Stephen if you do go for a Vipermax, spec it with two under floor cable ducts one to each transom box

[BogMonster]

Originally Posted by bedajim

Stephen if you do go for a Vipermax, spec it with two under floor cable ducts one to each transom box

What's the reason for that? I guess one side takes the engine wiring and plumbing, what would you use the other side for if fitted?

Transom knees sound like a good idea with nigh on quarter of a ton of motor on the back.

Anything else I should think about at build time??

[bedajim]

Originally Posted by BogMonster

what would you use the other side for if fitted?

Power steering pipes, nav light power, bilge pump power, transducer cable, It's not an expensive option at the time of build

+ I'd go for a 220 L fuel tank again a low cost option


Jim

[Hightower]

I've taken my discussion about CE plates etc to PM with Downhilldai as not to litter Stephens post.

[Hightower]

Who are doing the tubes for Ospery these days? Still Eurocraft?

[Chris]

Originally Posted by Petrov

Wrong installed or wrong prop, a Viper max 6,5m which is a wider hull and longer makes 44knots with a 150. I installed a 150 carburated engine on a 5,8m and had a topspeed of 50knots.

Exactly the performace I get on my 6.5 with a 150.

[Chris]

Originally Posted by Hightower

Who are doing the tubes for Ospery these days? Still Eurocraft?

Still Eurocraft I believe

[Chris]

Originally Posted by Hightower

I've taken my discussion about CE plates etc to PM with Downhilldai as not to litter Stephens post.

Mine did not have the CE plate attached Roy sometimes just sends them out via post.

[Ian M]

Originally Posted by BogMonster

What's the reason for that? I guess one side takes the engine wiring and plumbing, what would you use the other side for if fitted?

Transom knees sound like a good idea with nigh on quarter of a ton of motor on the back.

Anything else I should think about at build time??

Two under deck trunks - very worthwhile. Transom knee already mentioned. Bolt down removeable jockeys if going for a second row of seating. I've also got a couple of bolt down points in the forward desk for tying down anything that I might wish. If your boat will take it I like the look of the new Osprey Searider console
Oh, and I heard somewhere that Osprey are now making narrower jocket seat bases, which I would go for as the ones that I have got are too wide at the base to my mind.

[Chris]

Originally Posted by BogMonster

From what I read the Etecs lose out a bit to four strokes in mid range cruising fuel economy, which is a bit of a pain as that is where I burn most fuel.

With the 150 propped right on a 5.8 I would say you will see slightly better fuel usuage than you current VRO it may even be better with the 150 as at 25 knots you will be putting a fairly light load on the engine.

[BogMonster]

Originally Posted by Ian M

I've also got a couple of bolt down points in the forward desk for tying down anything that I might wish.

Any chance of a photo of these? Sounds like a good plan for restraining fuel cans...

Originally Posted by Chris

With the 150 propped right on a 5.8 I would say you will see slightly better fuel usuage than you current VRO it may even be better with the 150 as at 25 knots you will be putting a fairly light load on the engine.

I hope it will be a lot better! current one uses ~ 1.2L/nm on a typical day out cruising at various speeds, and I read all the time about people running round on about 2/3 of that. What consumption do you get on yours? I guess the Vmax is going to be less efficient than a Destroyer due to the deeper V but I was still hoping for a fair improvement?

[Downhilldai]

Originally Posted by BogMonster

I guess the Vmax is going to be less efficient than a Destroyer due to the deeper V but I was still hoping for a fair improvement?

What's the deadrise on the Destoyer?

[Hightower]

Originally Posted by Chris

Still Eurocraft I believe

Then I would then suggest that someone inspects the tubes before shipment to the Falklands then. Stephen has already had a bad experience of tube failure and I for one had some minor faults with my tubes several weeks after delivery with someone doing a Manchester to Portsmouth round trip to get sorted (Falklands is a little far to go I reckon ) and I know of at least one other Vipermax that had a complete set of tubes replaced FOC because of a fault. These might be isolated incidents, but better to be safe than sorry IMHO.

[Apherel]

Originally Posted by Downhilldai

Before you decide, take a look at this thread:

http://rib.net/forum/showthread.php?t=26149

Stephen, not much more to add than is in this thread. The Soozi 140 is fine, but the boat will take a lot more speed than the engine delivers.

The DF150 is a big lump of motor, (215 kg vs around 195 for the DF 140 or optimax 150 or etec) and I wonder if it would be on the heavy side on the back of a 5.8.

Would the 6.2 and DF150 be the better 4 stroke option?

On other things:
-get a through hull depth transducer fitted under the deck, or a well made so you can fit one later.
-make sure you get a stainless frame made for the windshield that you can hang onto as you move forward past the console
-have it delivered with a cover

[bedajim]

Originally Posted by Chris

Still Eurocraft I believe

Or you can have the other people in Leyland do them, S.I.T Ltd

[Mollers]

Originally Posted by bedajim

Or you can have the other people in Leyland do them, S.H.I.T Ltd

Do we know anything about them?

[chewy]

Originally Posted by Mollers

Do we know anything about them?

Ex Eurocraft employees I believe. They fit all Ribquest tubes and so far haven't heard any bad reports from them.
Look like they do a tidy job too!

[bedajim]

Originally Posted by Mollers

Do we know anything about them?

I've seen a set they made

[Downhilldai]

Originally Posted by bedajim

I've seen a set they made

What colour?