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RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections.

 
 
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Old 08-04-2013, 01:36 PM   #34
JustJeff
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Here is what I have found. My alternator seems to be acting the way a modded alternator should. It needs RPMs to keep 14v. Even with the fan not on, at 300-500ish RPMs it's not cracking 12.something volts. Without the fan running I bump the RPM up to 1k and my voltage climbs to around 14v. If I have the fan on and RPM at idle (300-500) I can watch my battery voltage drop. In a couple of minutes it went from 12v down to 11.8ish. With the fan on I need RPMs at 1-1.5k in order to see 14v on my DMM.

What is curious is that it did not behave this way before I needed to repair the wiring, but I guess that's just how things go.

I'll need to start planning for something different with my fan and charging system. With a TMIC I'm very limited on alternators. Before adding the efan I had an FD alt and that barely fit under my TMIC. With it squeezed under there the TMIC was making too much contact with the hood. I'd love to do a Taurus alt, but I'm quite sure that's not going to fit. I may have to start planning for a FMIC.
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1990 Vert/ S5-JDM 13BT (rebuilt but with issues I'm working out). Rtek N370 1.7, 550/800 injectors, FD fuel pump, RB REV TII exhaust, Tein springs and Illuminas
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