Alternator upgrade?
#1
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Alternator upgrade?
The stock 70 amp (or whatever it is) alternator isn't cutting it anymore. I'm running 3 fans, not including the blower with the a/c on, and add headlights to the mix and I'm getting about 11.9 volts at idle. Are Miata alternators pretty much the same as other Mazda alternators? I remember from when I had my FE3 powered 626, the alternator interchanged with one from an FD RX7 (100 amp), and even later model Subaru's (the legacy GT turbo has a 130amp unit!). Only a pulley swap is necessary. I'm hoping the same holds true for the Miata's as well.
#2
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Not 2 minutes after I posted this did I get the bright idea of looking at pictures of them on rockauto.com. Well looks like it will fit.
Miata alternator
RX7 100amp Alternator
2005 Legacy GT 110 amp Alternator
The legacy unit looks tricky since the terminal is on the other side, and the connector is probably different. Looks like the RX-7 alternator might be the way to go here.
Miata alternator
RX7 100amp Alternator
2005 Legacy GT 110 amp Alternator
The legacy unit looks tricky since the terminal is on the other side, and the connector is probably different. Looks like the RX-7 alternator might be the way to go here.
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I'm using an RX-7 FD alternator. Its pretty much a bolt-on, minus the battery light (leave the plug unconnected). It charges at about 14.3V when cold, but it drops as low as 13.5V when it gets hot (ie after several miles in stop and go traffic in 100*F weather). I'm going back to the stock NB alternator now that I have built my own alternator controller circuit.
Dimitris
Dimitris
#13
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I'm using an RX-7 FD alternator. Its pretty much a bolt-on, minus the battery light (leave the plug unconnected). It charges at about 14.3V when cold, but it drops as low as 13.5V when it gets hot (ie after several miles in stop and go traffic in 100*F weather). I'm going back to the stock NB alternator now that I have built my own alternator controller circuit.
Dimitris
Dimitris
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Dimitris
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Dimitris
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