TeamSwift
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Racing battery
http://www.teamswift.net/viewtopic.php?f=4&t=50540
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Author:  Dattman [ Thu Apr 21, 2011 7:59 pm ]
Post subject:  Re: Racing battery

t3 ragtop wrote:
my subwoofer would hit 2 low notes and those little batteries would vaporize. :twisted: :D


Dream on, the current delivery is astounding, when it's cold, starting the car internally warms the cells so they deliver more current not less like lead acid the more times you try to crank.

Yes LiPo batteries make great fire starters but only if you exceed discharge and charging rates which is pretty hard to do with an alternator that puts out a voltage only slightly higher than a 14 volt Lipo pack.

Author:  suprf1y [ Thu Apr 21, 2011 8:30 pm ]
Post subject:  Re: Racing battery

Not so, Richie. The output from those batteries is amazing. They're certainly not ideal for winter, but it's a fair tradeoff based on the weight savings.
One of my riding buddies uses one about the size of 4 C cells in his DRZ 400. It cost him less than a stock replacement, always starts the bike, and weighs 275 grams, about 2/3 of a pound.

Author:  MF89 [ Fri May 06, 2011 12:15 am ]
Post subject:  Re: Racing battery

suprf1y wrote:
Not so, Richie. The output from those batteries is amazing. They're certainly not ideal for winter, but it's a fair tradeoff based on the weight savings.
One of my riding buddies uses one about the size of 4 C cells in his DRZ 400. It cost him less than a stock replacement, always starts the bike, and weighs 275 grams, about 2/3 of a pound.


this is a very interesting post. I am always up for shedding weight in my racecar :mrgreen:

My track car has so much electronics its unreal - LOL
- electrical hydra power steering (90A),
- 4 LS1 coils,
- Full EFI w/ 2 fuel pump (30A)
- AIM dash
- Altenator charges at 14.1 (95A)
- Also now going 13:1CR

Based on the above what size LiPo batter pack would you recommend. :lol:

Author:  ellpee [ Sat May 07, 2011 4:12 am ]
Post subject:  Re: Racing battery

t3 ragtop wrote:
my subwoofer would hit 2 low notes and those little batteries would vaporize. :twisted:

i guess that race cars are for wealthy, single guys who are full of youthful exuberance. =)

honestly, super battery or not, i'd find it amazing if those would start a well worn 3 banger in an ohio winter. maybe a 5 second crank on a well tuned engine on a temperate day would work out okay, but sustained operation with lights, heater blower, radio, and windshield wipers would fast become a problem.

only for race cars, i guess. :D


Crap... Where's the Tardis??? Derek, make me up a battery will ya?

Author:  Dattman [ Sat May 07, 2011 2:31 pm ]
Post subject:  Re: Racing battery

Sure Lin, as soon as you find me all those megasquirt parts scattered around your house :rollin:

Actually I sold the partial kit so don't worry. :mrgreen:

MF89 probably the 4.6 or 6.9 AH packs which are configured as 4s2p or 4s3p, make sure you have an underdrive pully though, in fact every race car needs one to prevent overcharging and slow down your water pump.

Why do you have 3 fuel pumps or is one a reserve for endurance racing?

Author:  MF89 [ Thu May 12, 2011 8:57 am ]
Post subject:  Re: Racing battery

Dattman wrote:
...MF89 probably the 4.6 or 6.9 AH packs which are configured as 4s2p or 4s3p, make sure you have an underdrive pully though, in fact every race car needs one to prevent overcharging and slow down your water pump.

Why do you have 3 fuel pumps or is one a reserve for endurance racing?


It actually only 2 fuel pumps. That was a typo, sorry. Underdrive pull checked ;)

Author:  FlyingGrape [ Thu May 26, 2011 7:54 am ]
Post subject:  Re: Racing battery

suprf1y/Dattman or someone else who can answer. Any issues with the LiFePO4 packs with a smaller guage wire set?

I noticed the battery packs from omgod on ebay seem to use 8 guage while you appear to have used 0 guage on your dewalt pack.

Presume battery is OK in engine bay near starter with 8 guage but how about in cabin with that guage?

Author:  Dattman [ Fri May 27, 2011 3:33 am ]
Post subject:  Re: Racing battery

Ideally you want to keep those small leads as short as possible to minimise voltage drop, if mounting in the cabin then it should be as close as possible to your battery isolate switch, then run a thicker wire into the engine bay to either a 'hotpoint' or to the back of the starter motor if have wired to suit.

The quick connector is nice but not sure if I trust it for prolonged starting capacity, I think it's rated for 50ah.

Author:  FlyingGrape [ Fri May 27, 2011 6:46 am ]
Post subject:  Re: Racing battery

cheers Dattman, will not be using the quick connect anyway.

Author:  suprf1y [ Fri Aug 19, 2011 10:21 pm ]
Post subject:  Re: Racing battery

Just a follow up.
I've been running the 4 cell (2.3 AH) "RC battery" in my KLX 250 for the riding season.
It turns the motor over faster than the original lead acid battery, and provides plenty of reserve cranking amps.
Because it worked so well, I ordered the 6.9 AH for the GT, and will try it in the next few days.
There is a 30 lb difference between the stock, and lightweight batteries.

Author:  JamalSpelling [ Fri Aug 19, 2011 10:51 pm ]
Post subject:  Re: Racing battery

I'm super happy with my Braille battery.
I saved about 30lbs over the Optima I was running,
and it's about the same price new.
Attachment:
battery.jpg [81.04 KIB]
Downloaded 773 times


I looked at a few other models from Braille
and read up on their website.
I could have gone lighter, but thought this
was the best compromise suitable for a daily
driver. Plenty of power for my needs, I've been
running it a couple months now.
http://cgi.ebay.com/ebaymotors/_W0QQcmdZViewItemQQ_rdcZ1QQitemZ310318084786QQruZhttpQ3aQ2fQ2fwwwQ2eebayQ2ecomQ3a80Q2fschQ2fiQ2ehtmlQ3fQ5ffromQ3dR40Q26Q5ftrksidQ3dp3984Q2em570Q2el1313Q26Q5fnkwQ3d310318084786Q26Q5fsacatQ3dSeeQ2dAllQ2dCategoriesQ26Q5ffviQ3d1

Author:  suprf1y [ Fri Aug 19, 2011 11:27 pm ]
Post subject:  Re: Racing battery

Not bad, but still 15 lbs. The biggest Lithium ion are 2.

Author:  Dattman [ Sat Aug 20, 2011 2:39 am ]
Post subject:  Re: Racing battery

I think the 6.9 would be the best for most people, my 4.6ah battery has been fantasic, even after the car has been sitting for months this battery always starts the car, even when it's really cold, just a couple of quick attempts at starting and the battery is warm enough to deliver full current and my car has no cold start functions at all with quads.
I love the fact that the battery doesn't self discharge like Lead based batteries.

Don't forget there's extra weight that can be saved in wiring by locating the battery more centrally and a lighter mounting system due to the reduced size and sub 2lb weight, pound for pound I think it's one of the best performance mods available.

Sure get some funny looks with my 'dewalt 36v' battery though 8)

Author:  suprf1y [ Sat Aug 20, 2011 9:35 am ]
Post subject:  Re: Racing battery

The Turntech guy recommended his 5.0, but the Chinese 6.9 was similar in price, and we do get some cool weather here in the spring and fall, so I went with a little margin. I'll put it in today.

Author:  t3 ragtop [ Sat Aug 20, 2011 9:48 am ]
Post subject:  Re: Racing battery

i'm watching you. :shifty:

could one use the lithium ion conversion battery mounted in the original battery position? other than cold, is the ambient temperature a problem? the factory position right behind the radiator isn't exactly the coolest spot.

after i get done grinding up starters trying to get the megasquirt dialed in i might build one of these to replace my big honkin' optima red top.

Author:  swiftmotorsport [ Sat Aug 27, 2011 8:09 pm ]
Post subject:  Re: Racing battery

Nope haven't been on here for a while and that's all gone way above my head :? .

Author:  suprf1y [ Sun Aug 28, 2011 4:20 am ]
Post subject:  Re: Racing battery

t3 ragtop wrote:
i'm watching you. :shifty:

could one use the lithium ion conversion battery mounted in the original battery position? other than cold, is the ambient temperature a problem? the factory position right behind the radiator isn't exactly the coolest.


Stock position should be fine. If I recall, max temp is 70C. Shouldn't be a problem. I haven't found the time to install mine yet.

Author:  suprf1y [ Tue Aug 30, 2011 1:54 pm ]
Post subject:  Re: Racing battery

Know what this is?
Image
It's perspective.

Battery is in, and working fine.
Image

Author:  FlyingGrape [ Wed Aug 31, 2011 9:05 am ]
Post subject:  Re: Racing battery

I installed my 6.9Ah battery today (same as yours suprf1y). We did a temporary install while car is on the dyno (sitting in passanger footwell). My tuner is loving it. He has turned the car on and off a few times and cant believe it just keeps starting the car first time without hesitation. Fantastic little batteries!

Author:  JamalSpelling [ Wed Aug 31, 2011 4:28 pm ]
Post subject:  Re: Racing battery

Suprf1y, do you have a link to purchase that battery?

Author:  ROV [ Wed Aug 31, 2011 4:29 pm ]
Post subject:  Re: Racing battery

What is the price for this battery and who sells them ?

Author:  suprf1y [ Wed Aug 31, 2011 7:56 pm ]
Post subject:  Re: Racing battery

You guys should read the first page of the thread :P

http://www.ebay.ca/itm/A123-battery-4s3 ... 3499wt_907

Author:  t3 ragtop [ Wed Aug 31, 2011 9:52 pm ]
Post subject:  Re: Racing battery

news flash! racing battery translates in chinese search engine to buy my plagiarized art!

Author:  JamalSpelling [ Wed Aug 31, 2011 11:12 pm ]
Post subject:  Re: Racing battery

You're messin with us - that link wasn't posted before on the 1st page :huh:
(Psych!)

Quote:
Image


Well your first problem is using the big heavy lead terminal connectors to begin with,
you know those aren't factory issue. :lol:

Quote:
Image


Where do you connect the jumper cables when it fails?
:huh:


Jeez, 2lbs huh? Epic. Just might have to get me one of those firestarters.

Give us an update after dishing out some abuse, looks like it's on more of a daily
driven scoot than a full out racer, give it a good workout and let us know how it
holds out.

Author:  suprf1y [ Thu Sep 01, 2011 4:46 am ]
Post subject:  Re: Racing battery

It is a daily driver.
I don't expect it to fail, but thought about that possibility. Notice the ground lug on the - side, and under the fire sleeve on the + side is the same thing. Need a boost, just pull it back, and connect the cables.

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