911 Battery hold down

[CBurnett]

I was hoping that someone out there would have a picture of the battery compartment of a 911 SC. My battery is not held down by anything and I am not sure what hardware will work for this. Thank you.
CBurnett

[masraum]

There should be a small triangular metal tab that is held down by a bolt, similar to many modern cars, that holds the bottom edge of the battery. I had to buy a new one when I got my car, they aren't expensive.

[maxnine11]

if you have a battery that accepts the original style hold-down: http://www.pelicanparts.com/catalog/shopcart/911M/POR_911M_miscel_pg6.htm#item34
(item is at the bottom of the page)

max

[Chuck Moreland]

That's really a safety hazard. You should park the car until you get that fixed. It's easy for the positive terminal to short to the chassis if the battery is bouncing around.

[911SCfanatic]

I discovered a couple of weeks ago that mine is missing also. What if you don't have a battery that takes the original style--any solutions short of a new battery?

[jmohn]

Originally posted by 911SCfanatic
I discovered a couple of weeks ago that mine is missing also. What if you don't have a battery that takes the original style--any solutions short of a new battery?

You should be able to find a battery mounting plate and hardware at most auto-parts stores. Mine's metal but I've seen them in a heavy duty plastic or fiberglass. You'll need the longer version of this plate; one end of the plate slips under the original battery holding lip and the other is bolted down using the tapped hole for the original battery clamp. I had to modify mine, trimmed off one corner, and drilled a hole to accept a bolt to the original clamp bolt location. These plates will accept conventional, across the battery hold-downs. Mine uses a nylon strap with a cinch device.

Jerry M
'78 SC

[vash]

i guess the main issue is the original batteries back then were physically bigger? my new battery is relatively tiny. i am not even close to the fixed hook side of the battery hold down or the bolt down "tab" side. CBURNETT must be psychic, because i was going to post the same question. i was going to fabricate a solution, that involved a really big Ziptie, but jerry got me thinking. my bros'. bassboat has a really cool tray that uses tough nylon straps. nothing bounces like a bass boat! maybe i will check the regular auto shop first.
thanks jerry.

cliff

[no substitute]

Get a battery box that just squeezes into the area in question. I used an Attwood Seaguard. I cut about one inch off the top of the one I bought. Put the battery in it. Put the lid on the box, it doesn't fit tightly but it stays if you get the double spout type (for cable exit). This set-up holds everything in place without a clamp AND keeps battery acid/fluff off your precious Porsche body. The Optima battery I now use is a little small for the box, so you can stick in a foam spacer if this is a concern.

[CBurnett]

I just ran out and looked in my boat and it has a great hold down system that will work. I just need to find these parts and put them in. I will figure out how to post the photos when I get that done. Thanks to everyone.

[CBurnett]

I have a 2003 BlueWater Cascade. 20' run about. Lots of family fun.

[no substitute]

For clarity sake, Attwood Seaguard is the brand name on the polyethlene battery box. They may make more than one size, and some automotive boxes would no doubt work if the size was correct. The Attwood probably is for marine applications but it fit into the LF trunk corner perfectly.

[CBurnett]

Bingo. Thanks.

http://www.attwoodmarine.com/products/electric/battery_box.asp?category=4&gtype=1&path=electric&categoryname=Electrical+Equipment&typename=Battery+Box+and+Hardware&headername=Electrical+Equipment

[stlrj]

After years of jamming a wooden doorstop to keep the battery in place, I came up with this idea:

Cheers,

Joe

[shrouded]

I finally took care of this problem in my car a couple of weeks ago. My local Pep Boys had a battery tray for ~$10. With about 45 seconds of tweaking with pliers one end slid under the metal lip in the rear of the well, and the forward end had a hole that matched up with where the bolt would sit on the original clip. I bolted that to the car, then took a standard pair of j-rods and battery strap (from the same store) and used those to fasten the battery to the tray. $20 and 20 minutes, the problem is solved.

[Snitzler]

This is what I had in my 1988 Carrera. From the description the SC has a similar hold down?

[Goth]

OEM holdown for 1980 911 SC listed on PP (will need a bolt/washer too):
1980 Porsche 911 SC Coupe - Charging System & Battery - Page 3

[Driven97]

Also note there's a second bolt hole for a larger sized battery. I *think* the 3.2 cars came only with the bigger ones from the factory but I may be wrong.

[douglas bray]

I recently booted out a perfectly good and almost brand new Interstate battery in favor of an AGM. I welded up a tray that replicates the footprint of the original battery and welded an off-road box to it. Even had room for a couple quarts of oil...

[74-911]

Originally Posted by no substitute

Get a battery box that just squeezes into the area in question. I used an Attwood Seaguard. I cut about one inch off the top of the one I bought. Put the battery in it. Put the lid on the box, it doesn't fit tightly but it stays if you get the double spout type (for cable exit). This set-up holds everything in place without a clamp AND keeps battery acid/fluff off your precious Porsche body. .

When I bought my '74 in 1984 the PO was also using a marine battery box to secure the battery and 33 years later it is still being used. I just couldn't find anything which would hold the battery any better and it prevents any rust issues in that area. The battery box is a tight fit into the battery area and the battery is a tight fit into the box.

[Flojo]

Originally Posted by douglas bray

neat solution