Robert Linton

Has anyone tried this http://www.voltphreaks.com/home.html -- 12V battery (VPHR18) that weighs 6 lbs. For the price, $675, on a per pound basis, better weight savings for a Porsche than many other things.

FlyingDog

http://www.odysseyfactory.com/specs.htm The PC545 seems pretty common for race cars. Odyssey batteries are usually under $200.

Robert Linton

How do the specs compare?

Cory M

It was discussed here:

http://forums.bimmerforums.com/forum...d.php?t=798666

not worth it for me..

Robert Linton

Happily, the weight savings of this battery from my Varley Redtop 30 is more than the weight of my hood and outside mirrors put together.

schwank

I have a PC640MJ in my 944... runs great and starts fine even after a month of sitting.

mark kibort

saving 7 lbs for $675? thats kind of out of control!
Ill stick with my 13lb $100 battery from oddessy


However, savings 10lbs for $360 is not too far off! a little scary using only 7 amp hours batteries, but it should work if the charging circuit is in good shape.

https://s.p10.hostingprod.com/@www.v...6efac8dd259e40

mk

sbarton

Check out this 11.5lb battery for $115.
http://www.heeltoeauto.com/NRG-CELL-...y-pr-1001.html

-Scott

ApexPerformance

We just started offering the Braille B106 batteries. Specs below (although I haven't compared them to the post comparison from Bimmerforums):

The B106 is a sealed unit that can be mounted in any position safely using its adjustable automotive terminal posts & is approved for racing by all major sanctioning bodies.

Braille also includes a one-year free replacement limited warranty that is not pro-rated.

Casing: Polymer Plastic Enhanced Shell, Weight: 6 lbs, Length: 5.8, Width: 3.4, Height: 4.2, Pulse Cranking Amps: 527

LINK BELOW:
http://www.apexperformance.net/cartg...id=1553&cid=24

BrandonH

Good grief, towards what purpose? I guess for that minority of race classes with no weight minimums... But in a street or DE car? $675 sounds like a nice healthy contribution to a savings fund toward purchase of a proper race car...

911pcars

If it weren't for cranking requirements, few people would need the batteries we typically use. Push-starting would save 10-40 lbs. Besides, it's good exercise. Subtract 20 lbs. more if you delete the starter.

After starting, the charging system alone supplies the electrical energy for the vehicle systems. During normal running, the battery merely sits there, literally a lead weight, after being recharged by the cranking exercise.

Sherwood

Robert Linton

It is a good thing that Porsche racing is so economical. In F1, the cost of saving a pound can sometimes run from $20,000 to $50,000+.

kurt M

Makes me feel good about baking 70 pounds of paint, seam seal and undercoating off a 911 tub for only $1200.

ed devinney

Brandon - you need to see this car :-) Robert is modest but a 675 dollar battery is probably on the minor end of the extremes taken on a unique car. Once you've fabbed a titanium wiper linkage the battery decision must follow pretty easily.

I would love to see Humpty Dumpty in person some day, the pictures have been phenomenal.

brad@tirerack.com

We now carry the Braille battery brand as well as of about a week ago. Inventory is still coming in:

http://www.tirerack.com/accessories/brands/braille.jsp