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Re: Unique battery mount question... [Re: AndyF] #2987938
11/22/21 04:51 PM
11/22/21 04:51 PM
Joined: Jan 2003
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Minnesota
Hemi_Joel Offline
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Originally Posted by AndyF
That was the conclusion I came to with my Duster. My car sits in a heated garage so no need for a dump truck battery. I don't use the car as a snow plow or a tow truck, it only gets fired up on nice days so no need for a bunch of cold cranking amps. I measured how long the battery took to recharge after starting and it was typically less than 3 minutes.


Andy, my friend in southern Arizona uses $25 lawn tractor batteries in all his old cars. Even his 430 Lincoln. They all start because it is never winter there.


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Re: Unique battery mount question... [Re: AndyF] #2988163
11/23/21 10:08 AM
11/23/21 10:08 AM
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Mo.
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Originally Posted by AndyF
I used a small racing battery in my Duster and built a small tray for it that mounted in roughly the stock location. I decided that it made a lot more sense to put a small battery up front than a regular battery in the trunk. When you weigh all the extra cables, switches and stuff it works out to be less weight to have a small battery up front.

Andy what's the compression on that engine, is that a Braille 15/18 battery? I know you no longer have the car, but how was it holding up?

Re: Unique battery mount question... [Re: Hemi_Joel] #2988168
11/23/21 10:18 AM
11/23/21 10:18 AM
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Minnesota
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What charger do you use?

Re: Unique battery mount question... [Re: racerx] #2988187
11/23/21 10:57 AM
11/23/21 10:57 AM
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Oregon
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Oregon
Originally Posted by racerx
Originally Posted by AndyF
I used a small racing battery in my Duster and built a small tray for it that mounted in roughly the stock location. I decided that it made a lot more sense to put a small battery up front than a regular battery in the trunk. When you weigh all the extra cables, switches and stuff it works out to be less weight to have a small battery up front.

Andy what's the compression on that engine, is that a Braille 15/18 battery? I know you no longer have the car, but how was it holding up?


It was a 10:1 512. I don't remember the part number on the battery but it worked just fine. Only issue was that you needed to let the alternator charge the battery before you turned it off and restarted again. Which typically is no problem but you wouldn't want to start the engine, move the car a few feet, start the engine move the car a few feet kind of thing since you could eventually drain it.

Re: Unique battery mount question... [Re: Hemi_Joel] #2988192
11/23/21 11:07 AM
11/23/21 11:07 AM
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Posts: 10,982
North Dakota
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Originally Posted by Hemi_Joel
Roger, if you have an alternator, I don't see why you would need that big group 24. 900 cranking amps from the little 4 and 1/2 lb, $350 ATX 20 is more than enough for any racing engine. Unless you are ice racing in Beulah North Dakota when it's 30 below. wave


I'm was thinking strictly street applications and looked at the direct replacement for a group 24. As to me going racing, I'm too old with crappy reflexes! grin


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Re: Unique battery mount question... [Re: AndyF] #2988387
11/23/21 06:18 PM
11/23/21 06:18 PM
Joined: Aug 2008
Posts: 4,169
Mo.
racerx Offline
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Originally Posted by AndyF
Originally Posted by racerx
Originally Posted by AndyF
I used a small racing battery in my Duster and built a small tray for it that mounted in roughly the stock location. I decided that it made a lot more sense to put a small battery up front than a regular battery in the trunk. When you weigh all the extra cables, switches and stuff it works out to be less weight to have a small battery up front.

Andy what's the compression on that engine, is that a Braille 15/18 battery? I know you no longer have the car, but how was it holding up?


It was a 10:1 512. I don't remember the part number on the battery but it worked just fine. Only issue was that you needed to let the alternator charge the battery before you turned it off and restarted again. Which typically is no problem but you wouldn't want to start the engine, move the car a few feet, start the engine move the car a few feet kind of thing since you could eventually drain it.

Thanks Andy up

Re: Unique battery mount question... [Re: cudadoug] #2989534
11/27/21 09:50 AM
11/27/21 09:50 AM
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Mo.
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How low of cranking amps are you all getting away with battery mounted in the trunk, with and engines that has around 13.1 static compression with a alternator?

Re: Unique battery mount question... [Re: AndyF] #2989634
11/27/21 03:48 PM
11/27/21 03:48 PM
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Rittman Ohio
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It was a 10:1 512. I don't remember the part number on the battery but it worked just fine. Only issue was that you needed to let the alternator charge the battery before you turned it off and restarted again. Which typically is no problem but you wouldn't want to start the engine, move the car a few feet, start the engine move the car a few feet kind of thing since you could eventually drain it.

That doesn't really sound optimal for a drag car that you would start and stop probably a dozen times in day of racing. I would really be mad if I got ready to move out of staging lanes and into the water and the car wouldn't start after a few stop start cycles from the trailer to the lanes. But I guess if you push your car everywhere it wouldn't be an issue shruggy

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