Battery Question
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Battery Question

  1. #1
    Senior Member Alter Ego's Avatar
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    Default Battery Question

    I'm needing some help with choosing a battery...not sure if this should be asked here or in the dyno section. I am plannin on putting my battery under the back seat in the boat I am building. Question is, what is the minimum cranking amps I need? I'm runnin a 13:1 505 bbc, msd digital 6, and a summit brand gear reduction starter. Any ideas on the amps or where to find a battery to fit under the back seat?
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    ptc
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    For Optimas here are your choices:

    Red Tops: (Starting Purpose Batteries)

    Optima RedTop Specs - Red Top AGM Batteries by Optima


    Blue Tops: (Dual Purpose Starting & Deep Cycle)

    Optima BlueTop Specs - Deep Cycle Blue Top Battery Specifications by Optima
    Last edited by ptc; 03-15-2012 at 02:20 PM.
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    Broke Member monstertahiti78's Avatar
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    Quote Originally Posted by ptc View Post
    For Optimas here are your choices:

    Red Tops: (Starting Purpose Batteries)

    Optima RedTop Specs - Red Top AGM Batteries by Optima


    Blue Tops: (Dual Purpose Starting & Deep Cycle)

    Optima BlueTop Specs - Deep Cycle Blue Top Battery Specifications by Optima
    We have had Optimas in our boats for as long as I can remember so I went to Batteries Plus the other day to check the pricing on a new one and I was told that the quality of the Optima batteries have decreased dramatically. Apparently they have outsourced to Mexico and everything went downhill from there. Supposedly they have just about every other customer return their optima. Keep in mind this was one person telling me this and I have not done any research of my own on this yet. The brand that they did recommend though was NorthStar. From what I have found so far they seem to make a good battery.

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    Senior Member H20MOFO's Avatar
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    I am not an optima fan.....gonna be lots of opinions probably here. As far as what I know...or think I know is that a real high cranking amp battery will likely have a shorter life from more plates exposed...seems like they are less durable also...dont quote me there though. I was told a typical deep cycle/rv battery isnt the greatest for cranking. Napa sell a marine battery that supposedly is "somewhat" deep cycle....or maybe deeper cycle is a better term.
    Another Hot Boat refugee

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    Senior Member 2002CP19's Avatar
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    Odyssey is the way to go in a boat. IMO
    Quote Originally Posted by schick View Post
    Hold it firmly on the ground, a few pelvic thrusts should do the trick. If not repeat till satisfied!

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    Senior Member Alter Ego's Avatar
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    I may have asked the question wrong. I have had optimas in my last 2 boats, but I don't want a big or regular sized battery. I have seen odysseys that are for motorcycles I guess, but have like 680 crankin amps, I'm just wonderin is or will that also work on a motor like mine? Lookin for a compact battery that I can hide easily under the back seat.
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    New here Beer:30's Avatar
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    this has been talked about before. Here is a thread and there are others if you search on "optima": http://www.performanceboats.com/jet-...ht=optima+ctek

    I still have my BlueTop Optimas in the boat since 2005. The trick is to get them on a maintainer.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


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    Quote Originally Posted by 2002CP19 View Post
    Odyssey is the way to go in a boat. IMO
    I'll second this.

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    tintingsandiego krusn56's Avatar
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    I went with two marine 29 size batts from walmart been in since 08. About 75 bucks each. Had a red top in my 56 and the first time it went dead.....No more red top. I tried a yellow top and it lasted 6 months or so....Had good luck with the batt from walmart in the boat and now have one in the 56 for the last two years....
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    New here Beer:30's Avatar
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    Quote Originally Posted by krusn56 View Post
    I went with two marine 29 size batts from walmart been in since 08. About 75 bucks each. Had a red top in my 56 and the first time it went dead.....No more red top. I tried a yellow top and it lasted 6 months or so....Had good luck with the batt from walmart in the boat and now have one in the 56 for the last two years....
    Most of the reason for Optima failure (or any battery, for that matter) is operator error. I now have 32 Optimas in use. The oldest is from 1998 and is still powering my '57 2dr HT. The CTEK maintainers are the only way to fly.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

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    tintingsandiego krusn56's Avatar
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    I have had several cars and have went through a few batteries....the shortest lived ones were the optima. I have several stereo accounts and they tell me the same..... optima suck! But you may get lucky and buy the one that wasnt made by a 3 year old in china.....I keep all my batts on maintainers/chargers.
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    New here Beer:30's Avatar
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    Quote Originally Posted by krusn56 View Post
    I have had several cars and have went through a few batteries....the shortest lived ones were the optima. I have several stereo accounts and they tell me the same..... optima suck! But you may get lucky and buy the one that wasnt made by a 3 year old in china.....I keep all my batts on maintainers/chargers.
    I beg to differ. I'll agree that there are BETTER batts than Optima. Ops are just easy to get and affordable. I pay $149 for reds shipped to my door with no tax.

    I wouldn't have 32 of them if they didn't work. They definitely don't suck. FLOODED batteries SUCK. Drippy, smelly, and they have to be kept from tipping over. WHEN they leak, and they all will, they start to kill cables and battery trays. No thank you.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

  15. #13
    Senior Member cyclone's Avatar
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    Odyssey PC925
    Plenty of cranking amps. Fires my 15:1 big block no problem.
    Small and fairly light too. Been using one for several years now.

    If your ignition has a start retard function that will help a lot.

  16. #14
    Senior Member Alter Ego's Avatar
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    Quote Originally Posted by cyclone View Post
    Odyssey PC925
    Plenty of cranking amps. Fires my 15:1 big block no problem.
    Small and fairly light too. Been using one for several years now.

    If your ignition has a start retard function that will help a lot.
    Now we are getting somewhere. I wasn't asking which brand battery I need but rather what cranking amps would it take to successfully turn over my 505. I am gonna run a digital 6 msd which has a built in start retard, don't recall if its 10 or 20 deg.

    Cyclone, how long has the odyssey lasted so far?
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