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Electronics | Audio | NAV | Infotainment Anything related to in-car electronics, navigation, and infotainment.


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Old 02-26-2013, 02:13 PM   #1
AtlasMick
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Alternator Options

For those of us running or looking to run massive amperage drawing systems, what alternator options are you considering?

I haven't seen any increased amperage alternators for the FR-S/BRZ/GT86.

Does anyone have a link to the stock max alternator output?

Some considerations:

Smaller diameter pulley on the alternator
Dual alternator installation
Replace with higher output ALT.
Any other suggestions?
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Old 02-26-2013, 09:58 PM   #2
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i looked here for Scion TC alternators might be the same size. but i havent really considered buying one. im sure someone could chime in about whether it would work or not.

https://www.dcpowerinc.com/high-outp...2.4L+I4+2AZ-FE
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Old 02-27-2013, 05:10 AM   #3
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Maybe look at Subaru replacement alternators, since it is a Subie engine.
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Old 02-27-2013, 03:01 PM   #4
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Thank you FreshFRS and kmbkk!

I'm considering the second alternator setup. I'll have to look around in the engine bay to see where I could weld up a second alternator bracket. I'll post pictures later (likely Saturday) with the proposed spot for scrutiny and commentary.

http://powerbastards.com/proddetail....od=Fitzall-220
^ any opinions on this brand?
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Old 02-27-2013, 03:05 PM   #5
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So apparently none of you looked at the alternator before asking this???


It says on the label of the alternator that it is a 130A alternator.

please be mindful that this car already has a significant load due to the 90-100V required to open the DI against upwards of 200 BAR fuel rail pressure.....
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Old 02-27-2013, 04:22 PM   #6
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So apparently none of you looked at the alternator before asking this???


It says on the label of the alternator that it is a 130A alternator.

please be mindful that this car already has a significant load due to the 90-100V required to open the DI against upwards of 200 BAR fuel rail pressure.....
I own an Asphalt FR-S but yes, have not had a chance to look at the alternator due to workload. I was assuming it would be similar to most modern passenger cars, in the 90-110 range. 130 is surprising but you are saying the systems require this amperage? It is assumed the manufacturer will install an alternator that can run all the systems of the car simultaneously and then some, but not an excessive amount more. This is why almost always, for a big system build the alternator will need to be upgraded or supported to mitigate headlight dimming and reduced battery/alternator lifespan.

The system I am putting into this car crashed my alternator on my first build. Installed a high output, but still had headlight dimming issues, so I'm looking for advice and I will have a DIY for whatever I do to be informative for others with this vehicle wishing to install heavy draining audio systems or additional electronics.

So, this thread is about what is the best choice for this car (based on availability, cost, ease of use, effectiveness)
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Old 07-07-2013, 11:34 PM   #7
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Curious as well
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Old 07-08-2013, 09:15 AM   #8
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Mike Singer Alternators is able to make a 275a stock alternator replacement.
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Old 04-10-2014, 02:05 PM   #9
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Quote:
Originally Posted by FreshFRS View Post
i looked here for Scion TC alternators might be the same size. but i havent really considered buying one. im sure someone could chime in about whether it would work or not.

https://www.dcpowerinc.com/high-outp...2.4L+I4+2AZ-FE
Since I've used DC Power alternators before, they were my first choice. Here's the response I got from them:

Quote:
Greetings ,

As much as I would love to do this alternator right now, unfortunately we can't. We may later in the future but I don't have an exact answer as to when that will be.

Thank you
Has anyone successfully installed the Mike Singer alternator or any others for that matter?

I've had good experience with Excessive Amperage, Nations Auto Electric, Mechman, and others. I've contacted Nations, but awaiting a response.
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Old 04-10-2014, 04:27 PM   #10
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Quote:
Originally Posted by AtlasMick View Post
Mike Singer Alternators is able to make a 275a stock alternator replacement.
How much more engine power does it take to run it, though? I doubt you can get that much additional amperage just by upping the alternator efficiency, and there's always TANSTAAFL to consider. That extra electrical power has to come from somewhere, after all.
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Old 04-11-2014, 06:17 AM   #11
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Just got the Mike Singer 275A alternator last night, by hand it didn't feel all that much more difficult to spin. I see what you are saying. I'll have to ask how it's done.
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Old 04-11-2014, 06:32 AM   #12
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Are we concerned about massive sub draw? I thought same some decent D10 charge caps do the trick I've tested a 5.1k audison with two 10" no issues or dimming etc when car was running... Unless you're going all out like a stereo comp set and don't want to run caps I don't see the need. (For now) anyhow.
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Old 04-11-2014, 04:35 PM   #13
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Quote:
Originally Posted by AtlasMick View Post
Just got the Mike Singer 275A alternator last night, by hand it didn't feel all that much more difficult to spin. I see what you are saying. I'll have to ask how it's done.
Maybe higher spin rate, & improved efficiency?

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Old 04-11-2014, 08:28 PM   #14
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Definitely has a higher spin rate. The pulley is somewhere near half the diameter.

I opted for the externally regulated version, so I have quite a bit more install work to do prior to having the Singer alternator operating. I hooked up the stock alt to an ammeter see what it's current output was at idle right after cranking. 30 amps.

Last edited by AtlasMick; 04-11-2014 at 08:39 PM.
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