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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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#1 |
Lifetime Rotorhead
Join Date: Apr 2010
Location: Elkton, MD
Posts: 874
Rep Power: 16 ![]() |
FWIW, I ended up picking up that 110A alternator from AceAlternators on ebay. I have no means of measuring current draw to verify the 110A upgrade, but here's the voltages I'm seeing with it:
@ 750 RPM idle, low beams on + fog lights on + A/C fan on max = 12.6V. Nudge the idle up to 850 RPMs or higher, and it goes up to ~13.6V. With same loads switched off, from low idle and up nets between 13.6~14.5V. Also I have an alternator installation tip that might be useful if anyone runs into the problem I had. This particular alternator didn't want to slip over the water pump housing at the pivot point - it was maybe a few thousands of an inch too tight, and there was no persuading it to fit. After much cursing, and considering shipping it back, I had a brilliant idea... Just loosen the 4 bolts that hold the alternator halves together about a 1/4~1/2 turn each; that "spreads" the alternator half's just enough to get it to slip over the water pump housing pivot point. Once the pivot bolt was in, I just tightened the 4 alternator bolts back down and everything was fine. |
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#2 | ||
RCC Addict
Join Date: Mar 2008
Location: Honolulu, Hawaii USA
Posts: 1,813
Rep Power: 19 ![]() |
Quote:
You can get them for under $50 shipped - check eBay and Amazon. Until I can scrape up the skrillah to get a Fluke for several hundred $, the Mastech is "close enough" - who cares if it's off by 20%? ![]() Quote:
I've never seen mines go over 13.9VDC, and it's an FD unit rated to 150A... :P -Ted |
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