[Supras] Dry Cell Batteries for MK3

Fri Jun 8 10:59:02 CDT 2007

Which aluminum box did you get?

I bought the metal jacketed version since it's supposedly good to
175F.  My old DieHard saw 135F near the radiator and 115F near
the outside.  Supposedly most car batteries vent above 125F, Optima's
included.  Plus Jegs had it in stock and I was going right by there
on my trip to Columbus anyways.  :-)  Now I have no worries of battery
acid being spit out on to the paint.

I plan to make some heat shields for both the battery and the air
filter.  Both get WAY too hot.

On Fri, Jun 08, 2007 at 11:03:20AM -0400, khalida1 at aol.com wrote:
> Ok.  Thanks for everyone who sent their feedback.
> I went ahead and got the PC680T and the aluminum box that holds it down.  It turns out if you decide to place a drycell battery under the hood then it must be contained in a solid box to prevent it from expanding from the heat, otherwise the expansion would cause it to fail.  There is a version which comes with its won't box, they call metal jacket, which is the PC680MJ, MJ (for metal jacket).
> 
>      I realize the PC925 has more CCA and more charge capacity (25AH), but it also weighs 25lbs or so, and I wanted to benefit from a light weight battery 15 lbs for PC680.  Definetly the Braille is the lightest drycell battery around, and I almost went for it, but it does cost a lot more (~$170 for Braille and ~$82 for PC680).
> 
> Thanks again for all that replied.
> 
> /Khalid, 90T
> 
> 
> -----Original Message-----
> From: Jim Jobe <jjobe2 at supratech.org>
> To: Walker, Brian (Rich. Dist) <Brian.Walker2 at VDOT.Virginia.gov>
> Cc: khalida1 at aol.com; supras at supras.com
> Sent: Thu, 7 Jun 2007 5:25 pm
> Subject: Re: [Supras] Dry Cell Batteries for MK3
> 
> 
> 
> 
> 'll have to measure it tonight.  It's pretty much close to square
> nd 5.5" tall.  I have all of the factory tie down and did notice
>  bolt head in the front panel, up about half the height of the normal
> attery that I might be able to come off of with a bracket that the
> actory tie down bracket would then attach to, then shorten the j-bolt
> ccordingly.  Though if I shifted it off to the side rather than
> enter it I would have room for my PCV catch can.  Hmmmm....
> I don't want to relocate it to avoid not fitting in to NHRA, rules
> ith how the battery box much attach to the "frame" and not just the
> loor.
> On Thu, Jun 07, 2007 at 04:46:55PM -0400, Walker, Brian (Rich. Dist) wrote:
>  That's the one I had, I seem to recall it being longer at one dimension
>  but definitely shorter than the stock group size. I think it didn't fit
>  in the tray. I guess the ultimate would be a light battery relocated to
>  the trunk but I'm not sure how longer cables will effect the elec.
>  system. There are some nice boxes avail for the 925 but they can be
>  pricey. I bought a generic battery kit from the auto store and Al. bar
>  stock to make a hold down. The rubber tie down in the kit was to wide so
>  I only used the spacers and threaded hooks with pieces of the bar stock
>  across the batt. top.
>  
>  Brian
>  
>  -----Original Message-----
>  From: Jim Jobe [mailto:jjobe2 at supratech.org] 
>  Sent: Thursday, June 07, 2007 4:31 PM
>  To: Walker, Brian (Rich. Dist)
>  Cc: khalida1 at aol.com; supras at supras.com
>  Subject: Re: [Supras] Dry Cell Batteries for MK3
>  
>  
>  Not a 925MJT.  I just put one in.  It's much smaller than stock.
>  I need to either make a spacer equiv to 2 2x6's stacked up or modify the
>  tie down so it sits lower.
>  
>  I rarely drive the car so I disconnect the negative cable everytime I
>  get back home.
>  
>  On Thu, Jun 07, 2007 at 03:15:55PM -0400, Walker, Brian (Rich. Dist)
>  wrote:
>  > I've had a dry cell in my mk3 since July 05'. I first bought an 
>  > Odyssey
>  > (925?) but it was actually larger in one dimension than stock. I ended
>  
>  > up using the Braille battery (11 lbs.) and provides over 500 peak CCA.
>  > My car is not a DD and is garaged so it's not subject to many cold 
>  > starts. It normally starts fine as I drive it every 1-2 weeks but 
>  > beyond that time frame I use a smart charger as it can become a little
>  
>  > weak. I drained it once due to having the interior and brake lights on
>  
>  > during a lengthy alignment but a quick charger did the trick. I've 
>  > also jumped it with my jump box after the car sat for a while without 
>  > starting. I do carry a jump box to events just in case but starting 
>  > one morning of a track weekend last year with 30 deg. temps outside 
>  > was pretty impressive for a battery lighter than the one in my mower.
>  > 
>  > I still have a radio, although it's not used much. Also have other
>  elec.
>  > components in place (wideband, fuel control, misc gauges & sensors)
>  > 
>  > Brian
>  > 
>  > Date: Thu, 07 Jun 2007 11:35:07 -0400
>  > From: khalida1 at aol.com
>  > Subject: [Supras] Dry Cell Batteries for MK3
>  > To: Supras at supras.com
>  > Message-ID: <8C977308FDEC7D4-FF4-AC5E at webmail-db18.sysops.aol.com>
>  > Content-Type: text/plain; charset="utf-8"
>  > 
>  > Hi all,
>  > ???? I am considering using a dry cell battery, such as the Odyssey 
>  > PC680, to save weight and make space for my oil catch can (right now 
>  > it sets next to the charcoal canister).? I have stock computers (ECU, 
>  > ABS, stock ignition, etc), but no radio (the 4" tipped?magnaflow 
>  > provides all the music I need to hear ).
>  > ???? So I was hoping that perhaps someone with a similar electrical 
>  > setup has installed a dry cell battery in their MK3 and would be kind 
>  > enough to share their experience with the group.?? I am trying to find
>  
>  > out if this type of battery has introduced any problems, like 
>  > ignition, or not enough oomph to crank the 7MGTE, or ECU resetting
>  frequently?
>  > 
>  > Thanks in advance,
>  > /Khalid 90T
>  > 
>  > 
>  > 
>  > 
>  > 
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