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Alternator Upgrade? #1003873
05/31/11 05:33 PM
05/31/11 05:33 PM
Joined: Jan 2007
Posts: 780
Woodinville, WA
Viol8r Offline OP
super stock
Viol8r  Offline OP
super stock

Joined: Jan 2007
Posts: 780
Woodinville, WA
Recently installed EFI, electric fuel pump. Already had stereo/amp and digitial ignition system in there. I have a one wire 60amp Denso Toyota style alternator on the car.

The stock Ammeter gauge used to be close to 12 o'clock, now it holds pretty consistent at just below 20. I still show the battery charging at 14.0 volts. Am I going to need to upgrade the alternator to get the amp gauge closer to 0, or is it ok to run these kind of numbers? If my Volt gauge shows the correct battery voltage can I assume I have enough alternator for the job?

Re: Alternator Upgrade? [Re: Viol8r] #1003874
05/31/11 08:34 PM
05/31/11 08:34 PM
Joined: Mar 2007
Posts: 3,277
West Coast, USA
jbc426 Offline
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jbc426  Offline
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Posts: 3,277
West Coast, USA
Sounds like you better start by bypassing the Amp Gauge and the bulkhead connectors first before you go up in smoke.


1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
Re: Alternator Upgrade? [Re: jbc426] #1003875
05/31/11 08:45 PM
05/31/11 08:45 PM
Joined: May 2003
Posts: 4,280
Medford OR
FrankenScamp Offline
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FrankenScamp  Offline
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Medford OR
http://www.madelectrical.com/electrical-tech.shtml

LOTS of good tech here....upgrades are only as good as the crappy old wiring that feeds them. Yes bypass the ammeter and drill the bulkhead. It's not hard.

Re: Alternator Upgrade? [Re: jbc426] #1003876
05/31/11 08:55 PM
05/31/11 08:55 PM
Joined: Jan 2007
Posts: 7,664
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ahy Offline
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ahy  Offline
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Quote:

Sounds like you better start by bypassing the Amp Gauge and the bulkhead connectors first before you go up in smoke.




Good idea. Also, if you wored up the EFI and maybe fuel pump directly to the battery or fender relay (as recommended) it confuses the ammeter. The ammeter thinks the power being used by the EFI is going to the battery and shows charge all the time.

Its time for a bulkhead bypass which can be as easy as a length of charge wire from the alternator to the fender relay with appropriate fusible link soldered in. Follow that up with a volt meter in the passenger compartment and you will be in better shape. The voltmeter will monitor system condition.

The 60 amp denso is likley marginal in your application but first priority is to get the load off the ammeter and bulkhead connector.







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