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| Fiero 2.8 Alternator Rebuild (Page 2/4) |
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sardonyx247
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MAY 01, 01:15 AM
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AL87
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MAY 01, 08:34 AM
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| quote | Originally posted by sardonyx247:
To get higher amps you need to replace the windings, then you need better parts to support the higher amps.
(Mine is a 170 amp in a stock size case) and no I don't know anything about it execpt how to rebuild it. (pick-a-part score) 
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that is what I figured, I was reading up on it some more and that is the conclusion I got with my findings.
too bad these parts aren't easy to get, and you have to buy a whole assembly. 100 bucks isn't bad for one, with a year warranty though..
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theogre
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MAY 01, 11:44 AM
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Wasting time and money to fix dead 12SI Alternator.
You do all this and you still get same poor performance SI Alternator. CS series are better in most ways. CS130 generates more power for same engine load and uses 2 fans. (Old CS use weak bearing on back side. Current OE and Aftermarket makes better bearings.) See my Cave, Watt Story
OE 12SI Max Amps is 94a and many are lower, 66a or 78a peak amps.
Upping Current rating needs new Stator. Regulation and Diode Trio can be the same part. Better Diode affect only part life, not amp output.
Changing to CS130 is easy. See my Cave, Rabid-Wombat's CS-130 Conversion for 85-87 V6.
CS130 come w/ 105a rating from factory and aftermarket much higher.
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no2pencil
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MAY 01, 12:00 PM
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| quote | Originally posted by theogre:
Wasting time and money to fix dead 12SI Alternator.
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Ahhhhh perspective.
Most people think fixing a Fiero is a waste of time. So there's that.
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fireboss
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MAY 01, 03:01 PM
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AL87
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MAY 01, 03:34 PM
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| quote | Originally posted by theogre:
Wasting time and money to fix dead 12SI Alternator.
You do all this and you still get same poor performance SI Alternator. CS series are better in most ways. CS130 generates more power for same engine load and uses 2 fans. (Old CS use weak bearing on back side. Current OE and Aftermarket makes better bearings.) See my Cave, Watt Story
OE 12SI Max Amps is 94a and many are lower, 66a or 78a peak amps.
Upping Current rating needs new Stator. Regulation and Diode Trio can be the same part. Better Diode affect only part life, not amp output.
Changing to CS130 is easy. See my Cave, Rabid-Wombat's CS-130 Conversion for 85-87 V6.
CS130 come w/ 105a rating from factory and aftermarket much higher. |
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is the fiero electrical system going to be okay with a full electrical load on just 11 more amps?
EDIT to add: ..."Yes, the voltage meter still jumps when turn signals are on, but not nearly as hard."
I don't think its a bad concept to swap the alternators over, in fact it looks awesome, considering the less volume of the swapped alt on the install onto the v6.
the electrical system seems stable with it. but still... my experience with the stock alt is as such, the needle just dips too much, then the alt pops, and after that, I have to run with no acc's just so when I do use the turn signals, the belt doesn't start squealing. and for some reason, it only squeals when theres an excess load put on the alt. this is a grat thread and I'm learning some very useful info![This message has been edited by AL87 (edited 05-01-2014).]
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sardonyx247
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MAY 01, 06:06 PM
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| quote | Originally posted by theogre:
Wasting time and money to fix dead 12SI Alternator.
You do all this and you still get same poor performance SI Alternator. CS series are better in most ways. CS130 generates more power for same engine load and uses 2 fans. (Old CS use weak bearing on back side. Current OE and Aftermarket makes better bearings.) See my Cave, Watt Story
OE 12SI Max Amps is 94a and many are lower, 66a or 78a peak amps.
Upping Current rating needs new Stator. Regulation and Diode Trio can be the same part. Better Diode affect only part life, not amp output.
Changing to CS130 is easy. See my Cave, Rabid-Wombat's CS-130 Conversion for 85-87 V6.
CS130 come w/ 105a rating from factory and aftermarket much higher. |
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I had problems trying to swap to a CS, I think it fried them.
on another note, my biggest resaon for not going to a CS, is you can't push start it if the battery is tottaly dead(below iirc 9volts), they do not self excite. I have tested this on a bench.
but I am alittle jadded with my SI 170 amp. 
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fireboss
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MAY 01, 06:32 PM
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| quote | Originally posted by sardonyx247:
is you can't push start it if the battery is tottaly dead(below iirc 9volts), they do not self excite. |
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Did not know that thanxs
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FieroJimmy
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MAY 01, 06:56 PM
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CS alternators do that to prevent overloading themselves when people try to use them as a battery charger. 
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sardonyx247
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MAY 02, 06:29 AM
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| quote | Originally posted by FieroJimmy:
CS alternators do that to prevent overloading themselves when people try to use them as a battery charger. |
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Um, an alternator IS a battery charger.
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