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 Post Posted: Sun Nov 23, 2008 9:08 pm 
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Joined: Tue Apr 15, 2008 8:22 pm
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Location: Staunton, IL
I have a yellow top battery(it came with the car) and no alt. I got 2 passes out of it and almost didn't make it back to the pits. I also have a cooling problem. So I am contantly turning the car off and running the fan. Hopefully I'll get a bigger radiator this year. Starting is what kills the battery. Anyway you can also put a Battery Tender on the truck if you have a place at home to keep it plugged in. That way whatever way you go, the truck will be charged when you get to the track.

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 Post Posted: Mon Nov 24, 2008 6:33 am 
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Joined: Wed Apr 19, 2006 7:47 am
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Location: Australia
greetings all

i was watching this thread with interest as i will soon be putting battery / s into my car, its wired to run either one or to but will try one initially to see how it goes

i have charging facilities to charge the battery between rounds but think i will put into my trailer a connection to charge the battery whilist the car is in there

great idea Ken

all i need to do know if finnish the car & get back to working on my 3/4 completed trailer

regards
rod

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 Post Posted: Mon Nov 24, 2008 10:22 am 
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Joined: Sat Oct 21, 2006 11:41 pm
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Location: Morrison, Co
In my last two cars I've ran an Optima red top and an alternator.  No probs whatsoever.  Dragster runs same setup.


Mark

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 Post Posted: Mon Nov 24, 2008 6:13 pm 
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Joined: Tue Apr 18, 2006 10:11 pm
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Location: NJ
in the race boat we use a 16 volt agm batt no charger. most runs were at chatanooga, 5 races 3/8 mile circle track 5 laps total per race. no problems.

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 Post Posted: Mon Nov 24, 2008 11:04 pm 
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Joined: Tue Sep 05, 2006 10:41 pm
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Location: Bronson,MI
1-Napa Orbital and East Coast Alt for me  

Have had nothing but bad luck with the optima stuff, the Napa has more CA,CCA and Better warranty

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 Post Posted: Tue Nov 25, 2008 6:25 pm 
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Joined: Sun Nov 11, 2007 10:33 am
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Location: Montgomery, Alabama
One of these for me. Won't be going back to 12v

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 Post Posted: Thu Nov 27, 2008 6:37 am 
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Joined: Sun Sep 17, 2006 9:52 am
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Location: southern,ohio
Single standard battery and east coast alternator,with 25% reduction crank pulley,I drive mine on the street some and have no problems except that batteries don't seem to last for more than a couple of years.


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 Post Posted: Thu Nov 27, 2008 8:53 am 
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Joined: Wed Apr 19, 2006 5:39 am
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Location: Stranded in Iowa
I run an Optima yellow top single battery, with an alternator.  I always charge between rounds when I can. I have had problems in the past with the battery going down. I run a fan and electric water pump. I will be adding a second battery this winter. I want to be positive my electronics are getting what they need as far as power.

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 Post Posted: Thu Nov 27, 2008 10:01 am 
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My data logger shows me system voltage during the run and mine is usually in the 13.8 to 14.3 volt range.  

Might be a good time to call MSD to find out exactly how much voltage is required to make their systems run.  I remember a 9 volt number from some time back?  I'll make that phone call to verify this next week.

I do know this about computers though.  They have a very narrow voltage range that they operate in and since an automotive system is subjected to massive ups and downs, like when starting, it would make sense to build a system based on what the lowest voltage would be at any given point in it's use.  If they built the system to operate at 9 volts then they could use an IC regulator to make any voltage seen above that number still 9 volts.  Yup, time for a phone call!

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 Post Posted: Thu Nov 27, 2008 10:19 am 
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Location: NJ
ken, on the race boat we have a rectifier that keeps the gauge voltage at 14 volts, the ignition is hooked direct to the 16 volt side and also starter recieves full 16 volt for cranking.
if you wanted to control spikes a capaitor would take care of that and hold a constant voltage.

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 Post Posted: Thu Nov 27, 2008 10:24 am 
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Location: N.J.
If I remember I had asked MSD about there 7AL and they told my it needs a constant 7 volts to operate under that it may not be working properly..

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 Post Posted: Thu Nov 27, 2008 10:38 am 
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Location: Bronson,MI
If you ask MSD they said 11volts at all times. This was from asking them a few months back.

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 Post Posted: Thu Nov 27, 2008 10:39 am 
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Location: Blanco, Texas
11 is what I was told by MSD


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 Post Posted: Thu Nov 27, 2008 11:55 am 
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Location: Montgomery, Alabama
When I had the 12 volt battery my data logger showed 11.3 going down the track with the big magnafuel pump running and water pump as well as MSD Digital 7.


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 Post Posted: Thu Nov 27, 2008 12:34 pm 
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Must have been thinking about something else :-k ... My logger shows 13.5 volts going down track..... =;

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