Alternator to handle MS

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dart73
MegaSquirt Newbie
Posts: 7
Joined: Tue Sep 21, 2004 10:12 am
Location: Brazil

Alternator to handle MS

Post by dart73 »

Hello,

Just bought a mini anternator rated at 45a. Its a 1 wire alternator and its specs it goes up to ~60A in high revs. Would like to know if this can feed my car. V8 318 dart with megasquirt Efi, electric fuel pump, 8 fl injectors and Msd coil... Nothing else.. No sound and nothing else..

Is it too bad to have this "low" amaperage? Can i face performance issues?


Br,

--------------------
1973 Brasilian Dart
Megasquirted

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1973 Brasilian Dart megasquirted
kjones6039
Master Squirter
Posts: 618
Joined: Sat Jul 22, 2006 7:02 pm
Location: Eureka, Nevada USA
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Re: Alternator to handle MS

Post by kjones6039 »

45 amps will probably handle most anything you will need. Personally, I would prefer to use something that is rated quite a bit higher though.
Remember, it's not just about the alternator! Battery amp hour rating also weighs in here. For example, cranking a big, high compression v8 along with lots of other electrical load will certainly dictate a high battery rating. The alternator is then responsible for recharging the battery fairly quickly and maintaining that charge while also servicing the electrical load presented by all the other power consuming equipment in your car.

Bottom line...... On average, bigger is better! :lol:

Just my humble opinion of course.............

Ken

EDIT:
Can i face performance issues?
Yes you certainly can! If the electrical load exceeds the ability of the alternator to maintain the battery at full charge you are likely to see undesirable voltage variations that can directly effect your tune etc.
1979 Corvette - 383 CID SBC w/ Holley Pro-Jection 900 CFM TBI, 4-85 lb lo-z injectors & Walbro 255 pump
MS2 v3 w/ms2extra 3.4.0 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
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