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Old 04-09-2011, 07:00 PM   #81
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Brilliant. I've said it before and I'll say it again, I love this boat!!
So good to see someone else diving in and making major changes to their boat in their own back yard! I so hope this boat turns out to be everything you hope it'll be, you've put so much work in and seem to have learnt so much! I'm very impressed with your glasswork!

James
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Old 05-09-2011, 08:36 AM   #82
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Boat make: BananaShark 34' Race
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I suppose it would have been too easy to use the Yanmar BY260 which is already 3 litre, 260 hp and marinised? Then again where would the challenge have been!

Our thoughts on the Cougar is that the hulls stress crack either side of the bulkheads as the hull flexes, I think I would make sure you minimise the flexing between bulkheads especially with the extra weight in the boat.
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Old 05-09-2011, 12:44 PM   #83
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I suppose it would have been too easy to use the Yanmar BY260 which is already 3 litre, 260 hp and marinised? Then again where would the challenge have been!


IMHO the Mercedes diesel engine is one of the strongest and most reliable engines and good for ¼ million miles plus.

The Mercedes V6 engine will only just go through the hole where the outboard well was, the VW equivalent with heat exchangers mounted would not go through the hole, so nor would a strait six engine. It might be possible to fit a straight six engine but would have meant loosing the rear seats and moving the rib in front of the engine forward.

I have designed the engine setup so it is easy to remove or replace engine. ECU, raw water heat exchanger and charge cooler stay attached to the boat So to remove the engine, undo two ECU plugs, remove flow and return sealed cooling pipes, fuel flow and return are on bayonet fittings remove two engine mount nuts, remove two transom plate bolts, remove battery connections. Engine out in 20mins.

Low mileage engines are around £1000 to £1500 and are use in most Mercedes and Crysler’s vehicles, it’s a very common engine.

With all aluminum construction and cast in Iron liners it is the lightest 3 liter diesel engine at 210Kg + raw water heat exchanger and charge cooler 20Kg as opposed to the Yanmar at 310Kg gives a saving of 80Kg.

I believe the engine is good for 280hp reliably or 350hp for racing and scrap it at the end of a season. And if you scrap it at the end of a season just run with raw water trough it. 210kg and 350hp would make a very cheap lightweight engine. If you run two engines a season at £3000 would be cheap racing. The down side is that they will only produce 240hp with standard turbo as it is so closely matched to the engine


Our thoughts on the Cougar is that the hulls stress crack either side of the bulkheads as the hull flexes, I think I would make sure you minimize the flexing between bulkheads especially with the extra weight in the boat.

The front half of the hull, dash forward had already been strengthened and I have strengthened the rear half. I was also inspired by your construction using the Kevlar between the screen’s on the Bananashark and have reinforced the lip of the bulkhead that I removed with kevlar roving.
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Old 05-09-2011, 01:32 PM   #84
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Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's

Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,638
Sounds like a bargain and worth the effort - in the Marathon classes we have to run a production marine engine so that would not be an option for us - great project though!
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Old 11-09-2011, 08:04 PM   #85
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that kevlar looks hard work??? I love this boat... Kepp up the good work

Quote:
Originally Posted by freddy21 View Post
I suppose it would have been too easy to use the Yanmar BY260 which is already 3 litre, 260 hp and marinised? Then again where would the challenge have been!


IMHO the Mercedes diesel engine is one of the strongest and most reliable engines and good for ¼ million miles plus.

The Mercedes V6 engine will only just go through the hole where the outboard well was, the VW equivalent with heat exchangers mounted would not go through the hole, so nor would a strait six engine. It might be possible to fit a straight six engine but would have meant loosing the rear seats and moving the rib in front of the engine forward.

I have designed the engine setup so it is easy to remove or replace engine. ECU, raw water heat exchanger and charge cooler stay attached to the boat So to remove the engine, undo two ECU plugs, remove flow and return sealed cooling pipes, fuel flow and return are on bayonet fittings remove two engine mount nuts, remove two transom plate bolts, remove battery connections. Engine out in 20mins.

Low mileage engines are around £1000 to £1500 and are use in most Mercedes and Crysler’s vehicles, it’s a very common engine.

With all aluminum construction and cast in Iron liners it is the lightest 3 liter diesel engine at 210Kg + raw water heat exchanger and charge cooler 20Kg as opposed to the Yanmar at 310Kg gives a saving of 80Kg.

I believe the engine is good for 280hp reliably or 350hp for racing and scrap it at the end of a season. And if you scrap it at the end of a season just run with raw water trough it. 210kg and 350hp would make a very cheap lightweight engine. If you run two engines a season at £3000 would be cheap racing. The down side is that they will only produce 240hp with standard turbo as it is so closely matched to the engine


Our thoughts on the Cougar is that the hulls stress crack either side of the bulkheads as the hull flexes, I think I would make sure you minimize the flexing between bulkheads especially with the extra weight in the boat.

The front half of the hull, dash forward had already been strengthened and I have strengthened the rear half. I was also inspired by your construction using the Kevlar between the screen’s on the Bananashark and have reinforced the lip of the bulkhead that I removed with kevlar roving.
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Old 12-09-2011, 01:29 AM   #86
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Thread moved to General Boating Discussion

This thread has now been moved to General Boating Discussion

At the link below

boatmad.com/forum/showthread.php?p=208797#post208797
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