• Welcome to SVTPerformance!

How to install Optima Battery in the 03/04 Cobra.

Discussion in 'How-To' started by Wohpony, Sep 19, 2008.

  1. Wohpony

    Wohpony New Member Established Member

    Messages:
    117
    Joined:
    Jul 5, 2008
    Location:
    Navarre, FL
    I've seen alot of threads about what Optima battery fits best in the 03/04 Cobra so I decided to make a How To.

    So first off you need to pick up an Optima Battery (Part # 34-78, Model # 3478DT.)
    [​IMG]

    The only tools you should need is a 5/16" socket and rachet with a extension and a small saw.

    Remove the current battery then remove the battery tray by removing the 3 5/16" bolts one in the center and 2 on the side.

    Set the Optima battery in side the tray, you will notice its a little to wide mark the side of the tray that sits closest to the headlight useing the battery as a guide.

    Cut the side off the tray.
    [​IMG]

    Fit test the battery and cut more if needed.

    Install the two adapters that come with the battery.
    [​IMG]
    [​IMG]

    Install the battery tray, slide in your new Optima and tighten it down, connect the terminals and enjoy!
    [​IMG]
     
  2. Juruense

    Juruense Banned

    Messages:
    6,364
    Joined:
    Nov 7, 2006
    Location:
    USA
    I would add a couple things:

    It is best to cut the tray on the side towards the front of the car this way you will have an intact lip that will prevent the force of acceleration from sliding the battery back towards the rear.

    If your hold down bolt is corroded as they often are you can get a new battery tray at the Ford parts counter for only $14 that comes with new hold down bolt.
     
  3. EvilTwins

    EvilTwins I can't find my pulley! Established Member

    Messages:
    1,130
    Joined:
    Aug 13, 2007
    Location:
    St. John's, NFLD Canada
    Why did you put that blanket back around the battery? I run an optima but not that ugly blanket :)
     
  4. Juruense

    Juruense Banned

    Messages:
    6,364
    Joined:
    Nov 7, 2006
    Location:
    USA
    I think (not sure) that the blanket is to prevent damage when the battery explodes or to insulate it from heat...

    I also removed my blanket.
     
  5. Jomo1994z71

    Jomo1994z71 Can I get a KB WooWee! Established Member

    Messages:
    7,310
    Joined:
    Jan 29, 2008
    Location:
    DFW
    Very nicely done
     
  6. Hmbre97

    Hmbre97 Eaton powered Established Member

    Messages:
    3,702
    Joined:
    Jun 27, 2005
    Location:
    Austin, TX
    Or you can run the Ford GT battery (just a group 75/35 Optima with a Ford sticker on it) and not have to cut your battery tray. I got my battery from Steve @ Tousley for $129 + shipping and the adapter was free from Optima. Don't even have to pull the tray to install it since there are no modifications needed.

    [​IMG]
     
  7. whyte_03

    whyte_03 I got your HEMI hanging!! Established Member

    Messages:
    1,322
    Joined:
    Jan 24, 2007
    Location:
    Imperial County, CA
    i have a red top optima and by tray is not cut.
     
  8. Juruense

    Juruense Banned

    Messages:
    6,364
    Joined:
    Nov 7, 2006
    Location:
    USA
    There are two size optimas, you only have to cut the tray with the larger size.
     
  9. Areteracing

    Areteracing ON3ULUZ Premium Member

    Messages:
    300
    Joined:
    Apr 15, 2007
    Location:
    Longmont,CO
    I installed a different tray that was made for the Optima batteries. Holds it very well.

    [​IMG]
     
  10. 10thAnnvCobra

    10thAnnvCobra Member MACA Established Member

    Messages:
    1,780
    Joined:
    Feb 24, 2005
    Location:
    Pennsylvania
    Wow! ...and where did you get that?
     
  11. timbo3282

    timbo3282 New Member Established Member

    Messages:
    341
    Joined:
    May 20, 2005
    Location:
    Austin, TX
    Yes where did you get that? Is it a custom job or is that available for sale somewhere?
     
  12. nolyaw

    nolyaw Been there owned that Established Member

    Messages:
    454
    Joined:
    Apr 15, 2010
    Location:
    KY
    Anyone ever figure out where this tray came from?
     
  13. nolyaw

    nolyaw Been there owned that Established Member

    Messages:
    454
    Joined:
    Apr 15, 2010
    Location:
    KY
    Found it on ebay, looks like a killer piece!
     
  14. LIKE IT

    LIKE IT New Member Established Member

    Messages:
    367
    Joined:
    Jan 18, 2003
    Location:
    Maryland
    ? what is the CCA on that battery Thx.
     
  15. LIKE IT

    LIKE IT New Member Established Member

    Messages:
    367
    Joined:
    Jan 18, 2003
    Location:
    Maryland
    E/Bay and Amazon.com has them.
     
  16. BreBar21

    BreBar21 Born in the G-Code Established Member

    Messages:
    8,892
    Joined:
    Feb 2, 2003
    Location:
    Orlando
    I need to do that. My bolt is corroded almost to the point where it won't thread in.
     
  17. Back-N-Black

    Back-N-Black New Member Established Member

    Messages:
    67
    Joined:
    Aug 3, 2010
    Location:
    Florida Spacecoast
    Wouldn't the force of braking be higher than any possible force of acceleration?


    What is the part number and model number?

    What are the part numbers for these?


    I've gone to the Optima website and they do not identify any batteries for the Mustang or the GT.

    Anybody know who Tousley is? Tousley Motorsports perhaps?
     
  18. 04RedfireVert

    04RedfireVert Is it Friday yet? Established Member

    Messages:
    950
    Joined:
    Oct 22, 2008
    Location:
    MN
    The answer to that last question would be Steve at Tousley Ford. Look in the vendor section.
     
  19. venom one

    venom one Schoolin' your kids Established Member

    Messages:
    3,455
    Joined:
    Apr 25, 2005
    Location:
    Sun City
    Tousely Ford
     
  20. Back-N-Black

    Back-N-Black New Member Established Member

    Messages:
    67
    Joined:
    Aug 3, 2010
    Location:
    Florida Spacecoast
    This looks like a real nice setup but my 03 SVT Cobra hold down clamp does not look like the one you have pictured here. I can't find a 75/35 here but did find the 75/25. It was just too narrow for the 03 SVT Cobra mounting clamp.
     

Share This Page