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05-11-2011, 04:48 PM
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#1
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Registered User
Country: Spain
Location: Mallorca
Occupation: Retired
Interests: Boats, boats and boats
Boat name: Patriot and Forca
Boat make: Phantom 21. Falcon Bonito 36
Engines: 200hp Mariner. 2 x GM 6.5 Twin Turbo Diesels
Cruising area: The Med
Join Date: Nov 2006
Location: Mallorca
Posts: 716
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What size batteries?
What size batteries would be needed for a twin gm 6.5 diesel setup?
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05-11-2011, 06:12 PM
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#2
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Registered User
Country: Netherlands
Boat make: 20ft lenght of boat
Engines: 150 Bee-fff VTEC
Cruising area: South West
Join Date: Jan 2011
Posts: 42
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Take the BIG ones.
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06-11-2011, 10:06 AM
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#3
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Registered User
Country: Spain
Location: Mallorca
Occupation: Retired
Interests: Boats, boats and boats
Boat name: Patriot and Forca
Boat make: Phantom 21. Falcon Bonito 36
Engines: 200hp Mariner. 2 x GM 6.5 Twin Turbo Diesels
Cruising area: The Med
Join Date: Nov 2006
Location: Mallorca
Posts: 716
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Something like these?
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06-11-2011, 10:09 AM
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#4
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Registered User
Country: Spain
Location: Mallorca
Occupation: Retired
Interests: Boats, boats and boats
Boat name: Patriot and Forca
Boat make: Phantom 21. Falcon Bonito 36
Engines: 200hp Mariner. 2 x GM 6.5 Twin Turbo Diesels
Cruising area: The Med
Join Date: Nov 2006
Location: Mallorca
Posts: 716
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Now seriously please.
Is anyone running these engines and has any experience with the power rating needed to start these?
Would I be better with one for each engine or two for each engine?
I am planning the engine bay layout and would need t allow for the batteries.
Thanks
Peter
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06-11-2011, 11:53 AM
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#5
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Registered User
Country: Netherlands
Boat make: 20ft lenght of boat
Engines: 150 Bee-fff VTEC
Cruising area: South West
Join Date: Jan 2011
Posts: 42
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Each engine its own isolated heavy battery i should say.
But always connect minus battery tot battery, and double ground engine to engine
Very important, to avoid electrical circuits flowing high amps through tiny cable sections, immidiatly burning them.
With one dead you will never get in problems with double heavy ones.
Two light batterys parralel connected, will fire one egine easily and also the second and so will save you weight
Assume saving small money thhroug light batterys isnt your worry.
On a Marine i avoid connectors / couplings as much as possible, they corrode on age and will give you failure sooner or later.
Think the GM's are mild compression, look what the GM cars use and ad 30 or 50amps for marine.
I gues 120.
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06-11-2011, 04:53 PM
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#6
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Registered User
Country: Spain
Location: Mallorca
Occupation: Retired
Interests: Boats, boats and boats
Boat name: Patriot and Forca
Boat make: Phantom 21. Falcon Bonito 36
Engines: 200hp Mariner. 2 x GM 6.5 Twin Turbo Diesels
Cruising area: The Med
Join Date: Nov 2006
Location: Mallorca
Posts: 716
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Hi Bokito,
Thanks for the input. I'm not too worried about the weight and I've found that trying to save money usualy costs more, in the long run.
I was thinking along the lines of the 2 x 900 cca batteries, Any ideas? I was also thinking of using type of split charger system, as each engine has it's own alternator would this be a problem?
I'm sure there must be someone on this forum who is running something like these engines, maybe they have not seen this thread yet?
Thanks
Peter
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06-11-2011, 08:21 PM
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#7
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Registered User
Country: Guernsey
Occupation: Engineering
Boat make: None, boo!
Engines: Turbines mainly!
Cruising area: The inside of my workshop!
Join Date: Mar 2008
Posts: 2,646
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Isn't JF running similar engines in the 28? He'd be a good one to ask!
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07-11-2011, 07:55 AM
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#8
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BananaShark Member
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
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We run three on the race boat - with a split charging system they run independently for the two starter batteries both charging the third which runs the domestics and dashboard.
This will connect it all up: BEP switches
Not sure exactly what size you'll need I'm afraid.
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Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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07-11-2011, 08:25 AM
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#9
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Registered User
Country: Spain
Location: Mallorca
Occupation: Retired
Interests: Boats, boats and boats
Boat name: Patriot and Forca
Boat make: Phantom 21. Falcon Bonito 36
Engines: 200hp Mariner. 2 x GM 6.5 Twin Turbo Diesels
Cruising area: The Med
Join Date: Nov 2006
Location: Mallorca
Posts: 716
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Quote:
Originally Posted by larby
Isn't JF running similar engines in the 28? He'd be a good one to ask!
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Hi Larby, long time. I think JF is running similar engines, not sure how similar though as these are built to Peninsular spec and I believe that they play with the compression a bit .
Maybe JF will give me some idea of what he has found to work well with his motors.
Thanks
Pete
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Find It F'ME.... The new, advanced way to find what you are looking for. Easy to use, Easy to find, Hard to beat. www.finditfme.com
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07-11-2011, 08:29 AM
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#10
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Registered User
Country: Spain
Location: Mallorca
Occupation: Retired
Interests: Boats, boats and boats
Boat name: Patriot and Forca
Boat make: Phantom 21. Falcon Bonito 36
Engines: 200hp Mariner. 2 x GM 6.5 Twin Turbo Diesels
Cruising area: The Med
Join Date: Nov 2006
Location: Mallorca
Posts: 716
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Quote:
Originally Posted by Cookee
We run three on the race boat - with a split charging system they run independently for the two starter batteries both charging the third which runs the domestics and dashboard.
This will connect it all up: BEP switches
Not sure exactly what size you'll need I'm afraid.
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Hi Cookee, You must have read my mind. I was looking at those switches, from another thread on here. I was thinking of a third battery as she has an anchor winch, on top of the usual electrics.
Maybe someone will come up with the size needed or some way to calculate what size is needed.
Thanks
Pete
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Find It F'ME.... The new, advanced way to find what you are looking for. Easy to use, Easy to find, Hard to beat. www.finditfme.com
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