I have a NB with a NB alternator.

Today, I swapped alternators because I saw signs that my alternator was dying or weaksauce as indicated by voltage drop under boost.

So I swapped, and took a drive and logged. The new alternator worked great. I stopped to look at the logs and voltage was nice and stable around 14v instead of dropping to 12v.

I peel out and the car starts to miss and run like shi. I pull over and look at my EMS display and see voltage is now at 10.5v I pop the hood and see oops, the battery strap on the alternator fell off because i didn't nut it down.

I fire the car up again and drive off, and despite the strap being attached, the voltage is still 10.5v


WTF????? I have dyno day tomorrow and need to fix this now.

 

sawzall it off

 

Alternator needs more turbo.

 

turbonator?

 

I have a spare NB alternator. $5000 and you pick up?

 

that's a steal have him tip you with a *******

 

If you ran for a while off the battery, it'll need to charge, usually 10-20 minutes of driving with a good alternator will charge a battery that barely started the car a few minutes earlier.

Throw the battery on a trickle charger over night and see if it changes.

 

Fae bring the car to the dyno and we can throw a battery charger on it while it runs.lol

 

Swapped the nb alt for na alt.

Blah. This self regulatig alt sucks.

When i turn on the lights, voltage drops by .5. Turn on blower and same thing happens.

13v steady my ***.

For the one minute my nb alt worked voltage was steady at 14v even with lights on. Sigh.

 

seriously I do have a spare alternator. not really for $5000.

 

didnt we tell you the NA ALT SUCKS?

 

Argh damn it. In an attempt to make my dyno day i did rewire for the NA alternator. It can be undone, but ugh.

I hope the RX7 alternator doesn't suck because I think I will go to that.

 

weeks before dyno = do nothing, car runs ok
day before dyno = hey lets swap parts and re-wire stuff

you're either trolling or have serious self-destructive self-sabotaging tendencies.

 

This is news?