prodracing.com

Unofficial SCCA Production Racing Forum
It is currently Fri Oct 19, 2018 12:47 pm

All times are UTC - 8 hours




Post new topic Reply to topic  [ 16 posts ]  Go to page 1, 2  Next
Author Message
 Post subject: Battery Size
PostPosted: Tue Mar 13, 2018 9:46 am 
Offline

Joined: Thu Jun 06, 2013 9:39 am
Posts: 4
Can someone comment on common battery sizes used without a charging system? Thanks


Top
 Profile  
 
 Post subject: Re: Battery Size
PostPosted: Tue Mar 13, 2018 10:43 am 
Offline

Joined: Fri Nov 06, 2009 11:10 am
Posts: 34
I use 2 wheel chair batteries. They are 35 amp hours each, like recharging and fit in a universal battery box. They are not big in cold cranking amps but I have no problem turning over a 6 cylinder BMW engine. You might consider a total discharge controller if you are running fuel injection. Also, think about LED brake bulbs, that is if you use the brakes.
Kevin Leigh


Top
 Profile  
 
 Post subject: Re: Battery Size
PostPosted: Tue Mar 13, 2018 1:33 pm 
Offline

Joined: Sun Jan 23, 2011 4:54 am
Posts: 1793
I've got a big honkin 16V battery sitting in the garage. I took out the full-loss 16/12V system and replaced with traditional 12V battery and alternator.

I had no alternator up front with 80lbs of electronic crap in the pass floorboard and another 100+lb of ballast next to it, with an unreliable electrical system that had to be charged all the time.

replaced with battery and alternator, and I can easily reach the terminals for battery tender during long storage.

_________________
Matt Blehm
Houston Region
EP 1st Gen RX7
STU Nissan 240SX


Top
 Profile  
 
 Post subject: Re: Battery Size
PostPosted: Tue Mar 13, 2018 5:33 pm 
Offline

Joined: Mon Aug 26, 2013 1:04 pm
Posts: 209
i just went through this with my new fp car. 1st question - is the car heavy or light (do you need weight or not). this make a diff on size. Next, need to see what you have to power during the race (ecu, fuel pump, fans, data acq, gauges, etc). From there you can make your decision. I chose the XS Power S1200 as i rather put weight where i need it based on scales. If weight isn't an issue or you are worried about capacity, the XS Power S3400 is the one. You will never worry about running out of juice with the 3400. i used to do practice, qual, then race (full day) with one charge (my charger took a shit and we were stuck).


Top
 Profile  
 
 Post subject: Re: Battery Size
PostPosted: Tue Mar 13, 2018 6:41 pm 
Offline
User avatar

Joined: Sat Aug 17, 2002 7:32 am
Posts: 2632
Location: DeWitt, MI
I needed to shed 100+ pounds from my HP Sprite (it used to be at GTL weight of 1700+) and getting a smaller battery was a part of that. I removed a yellow top and installed a mobility scooter battery that weighs 15 pounds. I had a wide variety of amp hr sizes to choose from. I did some quick math and figured out that anything north of 20 amp hrs would work. I ended up getting a 28 amp hr model and it works just fine. I connect it to a trickle charger between sessions. Just to be safe, I mounted some hardware to allow a jump start from the removed yellow top that we keep on the golf cart on the grid.

Edit: BTW.....my battery was $70....and I got it at Batteries Plus.

Dayle

_________________
Dayle Frame (259138)
-------------------------------
Nat Comp & Div F&C, WMR Comp Manager


Last edited by Dayle Frame on Wed Mar 14, 2018 12:06 pm, edited 1 time in total.

Top
 Profile  
 
 Post subject: Re: Battery Size
PostPosted: Wed Mar 14, 2018 9:35 am 
Offline

Joined: Thu Jun 06, 2013 9:39 am
Posts: 4
Thanks for the replies


Top
 Profile  
 
 Post subject: Re: Battery Size
PostPosted: Thu Mar 15, 2018 10:07 am 
Offline

Joined: Wed Apr 27, 2011 7:33 am
Posts: 287
Am using a NAPA 7581R in my vintage Spridget with a total loss/no alternator system. Charge it up at the end of the day, no problems with it. Needed the battery to make the weight limit in the class.
ez


Top
 Profile  
 
 Post subject: Re: Battery Size
PostPosted: Thu Mar 15, 2018 6:35 pm 
Offline

Joined: Sun Nov 22, 2009 3:25 pm
Posts: 171
Has anybody tried lithium? I've got a Batter Tender lithium battery weighs 3.5lbs. Gonna try it next time out.


Top
 Profile  
 
 Post subject: Re: Battery Size
PostPosted: Thu Mar 15, 2018 7:08 pm 
Offline
User avatar

Joined: Sat Aug 17, 2002 7:32 am
Posts: 2632
Location: DeWitt, MI
Kerry Foote wrote:
Has anybody tried lithium? I've got a Batter Tender lithium battery weighs 3.5lbs. Gonna try it next time out.


I’m curious....what’d that cost?

Dayle

_________________
Dayle Frame (259138)
-------------------------------
Nat Comp & Div F&C, WMR Comp Manager


Top
 Profile  
 
 Post subject: Re: Battery Size
PostPosted: Fri Mar 16, 2018 8:42 pm 
Offline
User avatar

Joined: Thu Mar 27, 2003 7:43 am
Posts: 594
Location: Pueblo West, CO
If you go with lithium, just remember it does not like heat (recall the aircraft fires)
If it catches fire, it is Class D just like magnesium

_________________
Bob Cancellieri


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 16 posts ]  Go to page 1, 2  Next

All times are UTC - 8 hours


Who is online

Users browsing this forum: Bing [Bot] and 14 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group