sinus

This is not the question on thhis moment. On our ptototype boat we have MSA Marine surface drive, we are really satisfyed with it, but on the seccond build we will probably install Arneson to see all diferences.

Is it Arneson good with one drive to? I am hear that it work only with two. Is this mit or true?

I am ask this questions to know something more round of Z-drive and classic surface drives. I am ask my self why have expencive and wery fast OL 29 so conventional drive for example.
In my minds are walking questions like:"Perhaps stability, perhaps hydrodinamic drag, perhaps trim possibility?" And after, when I did not find any resonable answers, I am ask there.

On this moment still have no one resonable answer if look only technically aspect and forget marketing politics.

At our project we do not looking more than 75 mph, but extra fuell efficiency at speeds betwen 45 and 60 mph. Other questions we salve, only there with drive we need to hear experiences from other peopeles, best infos probably we will find there in this forum.

Rik

What kind of boat and power do you have?

sinus

In existing boat we have self marinised engine maded from two Suziki Hyabusa. They have 380 bhp and really good torque at start, they weight less than 400 # completelly with heat exschanger and exhausts. Same time they have good fuell efficiency ower all rpm field. On boats for salle we will have this engines or Ilmor V8-6,2 with 430 hp, depend of customer choice.
Existing weight of boat it is 3950#, but with Ilmor will be 500 # more. Lenght it is 28,8 ft.
It is quite fast, but our idea it is more in efficiency on long travelling for all familly. If you are alone with out of children, you could go faster too if you want.



p.s.
Rik, we talk round of this two years ago. Becouse of this world crisis we not push this project to much, but this year will be the time for all CE certificates and sale.

Few fotos, but have in minds, that this is prototype, nothing more!
http://shrani.si/f/2K/3Y/1NWZKa4N/slika-299.jpg
http://shrani.si/f/1z/LB/3HoU5nYq/slika-304.jpg
http://shrani.si/f/8/UK/3tQ6H0YY/slika-298.jpg
http://shrani.si/f/1M/QQ/2DqFkZc4/191120112875.jpg
http://shrani.si/f/1Q/8A/dNIqQaL/191120112855.jpg
http://shrani.si/f/I/pW/18pN5hMS/191120112862.jpg
http://shrani.si/f/42/Jd/1BxqnFVn/fotografija0091.jpg
http://shrani.si/f/3u/Qp/1aqNsRvz/20090716image0084.jpg

brian41

iTrader: (1)

Cow will be gone this spring, needs interior installed, gauges, sound system and then see if it runs.

4bus

iTrader: (4)

Looks great! Any pictures of the hyabusa engine?

sinus

@4bus;


Sorry, but on this moment we have no fotos. For test to se if they are good enough for use we are put together two engines and connect them together simple with double originall chains. They work really great and just in this time we make "finally" solution with classic closed gear box. It is funy how small they are. We put them under back seats and winn hughe usefully space.
For start we palne to build same thing like Radical, but it take to much speciall parts and it means troubles at service. Our solution it is much more simple, we will screw together two busa engines. It will work like Radical, but with all seriall parts and 20 kg more, which mean 120 kg.
Our first exhaust we build 1-2-4 and classic inside dry mufflers. At tests we find, that this engines have enough torque for 1-4 exhaust and classic marine gatlin 4" mufflers are good enough to keep amost al power.

Aprox. in two months we will have fotos of engines.

stirling

By Radical ,do you mean Hartley Enterprise , that made the cilinder block and crank to use 2 cilinder banks and heads ,rods and pistons from 2 Hayabusa engines ? and convert to a V8 high rev engine ?

Where do you live in Europe ?

Boatlesss

Is this the formula car engine?

professor_speed

No Its hyabusa heads on custom block etc. looks to be way short on torque.

http://www.radicalperformanceengines...Macroblock-v8/

sinus

At 3300 rpm on prop shaft have excelent torque curve. At first start we scare round of torque, but with out of any reasons.

@Stirling;
Slovenia, 1,5 km from Austrian border. We did not put them on single block like Hartley. It seems to risky for boat use. We screw them together with montage plate to achive "V8" block.
On one engine we pull power with original shaft and at other engine we pick up new shaft directly from clutch side. For this we made new part of engine. We change oil carter to, to avoid air sucking from oil pump.
With more smoth headers and inox air intakes we achive better power. For originally lambda number we need to change gass quantity for 12%!

Exhaust at the production.
http://shrani.si/f/9/31/2XberNvm/dscf3680-copy-1.jpg


First test. We are totally "loss our heads" becouse of to much adrenaline before start and later we decide, that we will no more made any videos before officially presentation. At this ride we have 20" prop and we achive only ca 50 mph, but enough for first minutes.
http://www.google.si/url?sa=t&rct=j&...42261806,d.bGE