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NEEDS FOR 2 BATTERY SET UP #2915323 04/26/21 04:50 PM 04/26/21 04:50 PM
Joined: Oct 2008 Posts: 1,176 East Coast A A/MP OP super stock
A/MP OP super stock A Joined: Oct 2008 Posts: 1,176 East Coast	I'm moving from the simple Moroso water pump to Meziere 42 gallon pump and a larger electric fan. Looking to use 2 battery set up. Do I need to increase my alternator to 100 amps? Presently 1 wire 60 amp denso style. Strictly a track car. Last edited by A/MP; 04/26/21 05:48 PM.

Re: NEEDS FOR 2 BATTERY SET UP [Re: A/MP] #2915330 04/26/21 04:56 PM 04/26/21 04:56 PM
Joined: Dec 2012 Posts: 1,823 Wind Gap,Pa. S Sammy top fuel
Sammy top fuel S Joined: Dec 2012 Posts: 1,823 Wind Gap,Pa.	Originally Posted by A/MP I'm moving from the simple Moroso water pump to Meziere 42 gallon pump and a larger electric fan. Looking to use 2 battery set up. Do I need to increase my alternator to 100 amps? Presently 1 wire 60 amp denso style. No. Should be fine. I run same setup with 57 Amp Jones alternator.

Re: NEEDS FOR 2 BATTERY SET UP [Re: Sammy] #2915384 04/26/21 06:59 PM 04/26/21 06:59 PM
Joined: Mar 2006 Posts: 9,815 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,815 MI, usa	I ran 2 12 volts for 7 years. Starting was not always optimal. Got to the point I had a small jump box between the seats. Had to use it more than once. 75 amp alternator. Last year went to 16 volt. Best thing I ever did. One 16 volt starts it way better than 2 12 volt ever did. Doug

Re: NEEDS FOR 2 BATTERY SET UP [Re: A/MP] #2915408 04/26/21 07:48 PM 04/26/21 07:48 PM
Joined: Sep 2014 Posts: 4,457 Washington M madscientist master
madscientist master M Joined: Sep 2014 Posts: 4,457 Washington	Originally Posted by A/MP I'm moving from the simple Moroso water pump to Meziere 42 gallon pump and a larger electric fan. Looking to use 2 battery set up. Do I need to increase my alternator to 100 amps? Presently 1 wire 60 amp denso style. Strictly a track car. If you are going to use two 12V batteries I’d use a series-parallel switch and fire the car off of 24V and never look back. The engine will start quicker, the batteries will hold a charge longer and it’s just a better way to do it. Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston

Re: NEEDS FOR 2 BATTERY SET UP [Re: A/MP] #2915431 04/26/21 08:41 PM 04/26/21 08:41 PM
Joined: Aug 2003 Posts: 43,099 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,099 Bend,OR USA	I learned that with a two group 24 RV marine deep cell batteries and a good alternator it helps to slow charge the batteries before race day, that way they won't have to rely on the alternator to keep them near full charge after sitting between races. I use a 4 to 6 amp charger and let it run 24 to 48 hours before taking the charger off, I also use it during our lunch breaks at the track to top them off Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: NEEDS FOR 2 BATTERY SET UP [Re: madscientist] #2915477 04/26/21 10:44 PM 04/26/21 10:44 PM
Joined: Oct 2007 Posts: 4,205 New York polyspheric master
polyspheric master Joined: Oct 2007 Posts: 4,205 New York	W/r/t I’d use a series-parallel switch and fire the car off of 24V Mercedes did this with great results Boffin Emeritus

Re: NEEDS FOR 2 BATTERY SET UP [Re: Sammy] #2915485 04/26/21 11:20 PM 04/26/21 11:20 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	I have never run 2 batteries ever if you are running a alt... I had the same battery in it for 7 years.. the battery was still good but I changed it out

Re: NEEDS FOR 2 BATTERY SET UP [Re: MR_P_BODY] #2915546 04/27/21 08:33 AM 04/27/21 08:33 AM
Joined: Jan 2003 Posts: 11,705 Portage,michigan B B3422W5 I Live Here
B3422W5 I Live Here B Joined: Jan 2003 Posts: 11,705 Portage,michigan	I learned how important proper wiring and good connections are. Had my car professionally rewired year before last. Going rounds, running electric water pump and fan, etc, etc. one interstate battery and 90 amp 1 wire alternator... not had a battery charger within 50 yards of the car one time since..ever. Car starts like its got 16v system on it every time. 69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8

Re: NEEDS FOR 2 BATTERY SET UP [Re: MR_P_BODY] #2915559 04/27/21 09:11 AM 04/27/21 09:11 AM
Joined: Mar 2003 Posts: 2,491 PA moparacer top fuel
moparacer top fuel Joined: Mar 2003 Posts: 2,491 PA	Originally Posted by MR_P_BODY I have never run 2 batteries ever if you are running a alt... I had the same battery in it for 7 years.. the battery was still good but I changed it out Same here Mr P. 67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174

Re: NEEDS FOR 2 BATTERY SET UP [Re: B3422W5] #2915563 04/27/21 09:21 AM 04/27/21 09:21 AM
Joined: Feb 2005 Posts: 20,151 PA. pittsburghracer "Little"John
pittsburghracer "Little"John Joined: Feb 2005 Posts: 20,151 PA.	I ran a 16 volt battery many many years ago before it was the cool thing to do. They were made in New Castle Pa and rarer to find then Hens teeth. I was always afraid of it going bad at one of the long race weekends I raced at so I took a good Sears Platinum 12 volt battery with me to a test n tune one night. I ran 8.66 with the 16 volt and 8.66 with the 12 volt battery. And this was before I was smart enough to run an alternator. I ran the 16 volt for another year till it was getting older and never ran one since. There’s one sitting in the heads up car I bought five years ago that will be getting pulled out to. We were all in a hurry to pull our alternators out of our cars 35 plus years ago and it was the stupidest thing we could have ever done. Lol 😂 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: NEEDS FOR 2 BATTERY SET UP [Re: pittsburghracer] #2915578 04/27/21 10:06 AM 04/27/21 10:06 AM
Joined: Oct 2008 Posts: 1,176 East Coast A A/MP OP super stock
A/MP OP super stock A Joined: Oct 2008 Posts: 1,176 East Coast	I'm always running the fan and water pump after I make a pass. Wound up going rounds at a 250+ race. It seemed lazy for the last start up. Only have 2 smaller LED lites for heads lites. It was too late to diagnose and I blew it in the 1/4 round. Never made a covid race last year and the battery needs to be replaced this season. If I'm replacing, then adding to or taking off, its time now to do make some changes.

Re: NEEDS FOR 2 BATTERY SET UP [Re: pittsburghracer] #2915584 04/27/21 10:10 AM 04/27/21 10:10 AM
Joined: Jan 2003 Posts: 8,018 Tulsa OK Bad340fish master
Bad340fish master Joined: Jan 2003 Posts: 8,018 Tulsa OK	Originally Posted by pittsburghracer I ran a 16 volt battery many many years ago before it was the cool thing to do. They were made in New Castle Pa and rarer to find then Hens teeth. I was always afraid of it going bad at one of the long race weekends I raced at so I took a good Sears Platinum 12 volt battery with me to a test n tune one night. I ran 8.66 with the 16 volt and 8.66 with the 12 volt battery. And this was before I was smart enough to run an alternator. I ran the 16 volt for another year till it was getting older and never ran one since. There’s one sitting in the heads up car I bought five years ago that will be getting pulled out to. We were all in a hurry to pull our alternators out of our cars 35 plus years ago and it was the stupidest thing we could have ever done. Lol 😂 I manage a battery distributorship and we are two miles from the dragstrip. Its rare but we get the occasional panicked call of someone looking for a 16 volt battery. The only way we have to make 16V is two 8V golf cart batteries, no one has been that desperate yet. I suppose its probably not a big deal to convert to 12 volt for a weekend if you are carb'd? An EFI car might have an issue if they didn't have good injector data entered. 68 Barracuda Formula S 340

Re: NEEDS FOR 2 BATTERY SET UP [Re: Bad340fish] #2915589 04/27/21 10:26 AM 04/27/21 10:26 AM
Joined: Jan 2003 Posts: 2,533 Alexandria, LA B Blucuda413 master
Blucuda413 master B Joined: Jan 2003 Posts: 2,533 Alexandria, LA	Back in the old days it was a common practice for people to remove starters also to reduce weight. This was primarily in altered and dragsters and classes like that. Everyone push started their cars. I went to the AHRA Nationals in 1961 and I was the only mechanically fuel injected car that started my car with a starter, I was able to do it and it was much more convenient.

Re: NEEDS FOR 2 BATTERY SET UP [Re: Blucuda413] #2915643 04/27/21 12:05 PM 04/27/21 12:05 PM
Joined: Apr 2003 Posts: 3,508 Tulsa, Oklahoma 340Cuda master
340Cuda master Joined: Apr 2003 Posts: 3,508 Tulsa, Oklahoma	I run two twelve volt batteries. One for the ignition one for everything else being Meziere pump, electric fans and fuel pumps. I don't run an alternator. I do charge the batteries between rounds.

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