Alternator info

06-12-2013, 04:04 PM

I was wondering how many of you guys run the 93mm Nipondenso alternators? The next question I have is what amperage ratings are they. I'm running a Meziere water pump and a 2300 CFM electric fan. The 40 amp alternator Im running will not keep up.
I see they make this alternator in 60 and 70 amp rating, has anyone tried one and do you like them? Where would you recommend buying one?
Thanks...

bob3240 · 06-12-2013, 06:42 PM

Todd, I don't know yet how mine will work out, but try Parts Geek or Rock Auto. They were about $40 bucks less than the local parts stores. Of course pulley size plays a big part. Bob M.

Larry Merk · 06-12-2013, 08:27 PM

Todd,

I learned that lesson the hard way.

We put a 40 amp mini Nippondenso on our car and after 2 runs the starter would barely turn the motor over. We were not charging the battery between runs. So we added the amperage requirements of all the electrical equipment and found that 40 amps was insufficient to power everything and charge the battery.

We bought a 75 amp Powermaster mini alternator from Summit and it has solved our problem. If we have time we put the battery charger on the car, but if we don't we know the battery has plenty of juice to run the car.

Tom Goldman · 06-13-2013, 09:51 AM

Todd, I had an East Coast Ultra Mini , which is the same alternator on my AMX . ....It maintained good voltage thruout the run, but it does not provide enough current to charge/ maintain the battery without charging between rounds.....I only used the switch off feature a few times ,since the volt drop to the MSD usually slowed the car more than was gained by killing the alternator drag .

06-12-2013, 04:04 PM	#1
Todd Hoven Guest Posts: n/a	Alternator info I was wondering how many of you guys run the 93mm Nipondenso alternators? The next question I have is what amperage ratings are they. I'm running a Meziere water pump and a 2300 CFM electric fan. The 40 amp alternator Im running will not keep up. I see they make this alternator in 60 and 70 amp rating, has anyone tried one and do you like them? Where would you recommend buying one? Thanks...

06-12-2013, 06:42 PM	#2
bob3240 Member Join Date: Jan 2009 Location: lebanon ohio Posts: 251 Likes: 3 Liked 16 Times in 5 Posts	Re: Alternator info Todd, I don't know yet how mine will work out, but try Parts Geek or Rock Auto. They were about $40 bucks less than the local parts stores. Of course pulley size plays a big part. Bob M.

06-12-2013, 08:27 PM	#3
Larry Merk Member Join Date: Aug 2010 Location: Kennewick, WA Posts: 211 Likes: 41 Liked 261 Times in 111 Posts	Re: Alternator info Todd, I learned that lesson the hard way. We put a 40 amp mini Nippondenso on our car and after 2 runs the starter would barely turn the motor over. We were not charging the battery between runs. So we added the amperage requirements of all the electrical equipment and found that 40 amps was insufficient to power everything and charge the battery. We bought a 75 amp Powermaster mini alternator from Summit and it has solved our problem. If we have time we put the battery charger on the car, but if we don't we know the battery has plenty of juice to run the car. __________________ Larry Merk

06-13-2013, 09:51 AM	#4
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,468 Likes: 874 Liked 838 Times in 232 Posts	Re: Alternator info Todd, I had an East Coast Ultra Mini , which is the same alternator on my AMX . ....It maintained good voltage thruout the run, but it does not provide enough current to charge/ maintain the battery without charging between rounds.....I only used the switch off feature a few times ,since the volt drop to the MSD usually slowed the car more than was gained by killing the alternator drag . __________________ Tom Goldman 1500 SG , 1506 STK