'Race' / lightweight battery installations

Discussion in 'Drivetrain, Exhaust and Electrical' started by Grant 302, Dec 6, 2017 at 3:52 PM.

  1. Grant 302

    Grant 302 OPM Spent: $265,852 Moderator

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    Please post yours, just starting the thread with my Braille B2015 install and to highlight some of the minor issues I had. I used their FRP bracket with 8" J hooks, and some reflective battery insulation from Jeg's.

    Before getting started, checked the voltage of the new battery:
    [​IMG]
    Card inside said 13.07V and mfg. date of 11/14/17 so I would have been fine with anything above 12.7 or so.

    Plugged in the cigarette adapter and hooked it up to the charger:
    [​IMG]
    Hooked up the charger on 13.6V power supply mode:
    [​IMG]
    Not needed to change the battery, but good to use if you don't want to clear the KAM and maybe presets and any other stored data.

    Positive terminal came off easily, but the negative side looked like the clamp had really dug into the post. Enough so that prying it off took this ring of lead with it:
    [​IMG]
    [​IMG]

    Insulated the new battery:
    [​IMG]

    Initially I was going to align the clamp on the negative terminal side and re-use the OEM strap shortened for a snug fit:
    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    THEN I STRIPPED THE SPRING NUT WITH THE LONG TIE-DOWN BOLT. :mad:

    So I abandoned the strap and drilled the other side of the tray for the J-bolts.
    Installed:
    [​IMG]

    [​IMG]

    Checking the charge (still through the cigarette port):
    [​IMG]

    I thought I should switch over to the charger pigtail...CRAP! :mad: Forgot to put that in too!

    Attached the positive lug here:
    [​IMG]

    Negative lug under the nut for the terminal clamp:
    [​IMG]

    Charging port zip tied and plugged:
    [​IMG]

    I was putting everything away and I saw these:
    [​IMG]

    And then I realized I could have put the pigtail on the side terminal screw location using these spacers and screws to better hide it. The pigtail would just go with the battery, if you needed to pull it out anyway. CRAP, CRAP, CRAP! :mad: That would have made more sense.

    At that point I was too hangry to bother with changing it, and I already trimmed the positive side rubber cover for the lug. I guess that's where it'll go when I get around to changing the one on the Boss. :D
     
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  2. RES_22

    RES_22 Rob

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    IMG_0156.JPG

    Cut down OE battery box...made cardboard base template and had local shop fab one out of 7mm aluminum. Pretty sanitary.
     
  3. Grant 302

    Grant 302 OPM Spent: $265,852 Moderator

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    Nice and clean. I probably shouldn't have cheaped-out with the J-hook install! I think I'll go that way for the Boss.
     
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  4. ArizonaBOSS

    ArizonaBOSS Because racecar. Moderator

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    Sounds like you had a fun time :)
     
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  5. Grant 302

    Grant 302 OPM Spent: $265,852 Moderator

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    :D Sometimes fun, sometimes *extra* fun!
     
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  6. RES_22

    RES_22 Rob

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    Grant:

    I can scan you a copy of my template... including mounting holes.

    Not sure though if S197 and S550 OE battery boxes are identical.
     
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  7. Grant 302

    Grant 302 OPM Spent: $265,852 Moderator

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    Thanks for the offer, Rob, but I'm sure they're different just looking at your pic above.
     
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  8. VoodooBoss

    VoodooBoss Rick Moderator

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    Nice work gentlemen. To me this makes more sense than relocating the battery to the trunk on a street driven car. Race car is a different story.
     
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  9. Grant 302

    Grant 302 OPM Spent: $265,852 Moderator

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    Agreed. Proximity to the starter is more practical than the weight distribution for street/mixed use. It's good that technology has afforded us so many options.
     
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  10. u00mem9

    u00mem9 TMO Intermediate

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  11. VoodooBoss

    VoodooBoss Rick Moderator

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  12. Black Boss

    Black Boss TMO Addict

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    These batteries are getting so light that it makes relocation to the trunk debatable even for a race car. You end up adding 50% plus of the battery weight in cable. Although both the cable and battery are lower in the car.

    I decided it wasn’t worth the added weight and complexity for my race car build and stuck with the stock location, having previously relocated the Battery on the Boss.

    EDF26E71-84FC-4949-8E04-34639C117B05.jpeg
     
  13. RES_22

    RES_22 Rob

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    Absolutely correct. You have a 6lb battery... pixie dust .

    But relocating even a 10 or 15 lb battery to the trunk returns few sensible benefits when you look at the big picture.
     

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