Hi,
I see tons of threads on upgrading a V6 alternator from SI to CS130 but nothing for the 2.5.
Is there any difference in the procedure that I need to be aware of?
It looks to be a two wire set up so i know I'll need to adapter plug...

------------------
1984 Indy Fiero

[This message has been edited by ag9123 (edited 02-10-2014).]

basic same thing.

also See my Cave, Alternator Sense

------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave (It's also at the top and bottom of every forum page...)

quote Originally posted by theogre: basic same thing.

Yup. Put one on my Indy's engine - fits the stock alternator brackets.

------------------
Calgary time/temp

3.4L Supercharged 87 GT Click me
Super Duty 4 Indy #163 Click me

Just FYI, the 88 Fiero V6 uses a CS alternator. It uses a serpentine belt, whereas yours uses a V-belt. So if you swap pulleys and grab a wiring pigtail, you should be good to go.

[This message has been edited by Blacktree (edited 02-12-2014).]

Thanks for the quick responses guys! best forum I've ever been on... I don't think there's any Fiero issue that hasn't been discussed in here

------------------
1984 Indy Fiero

As the others have said....it is as simple as swapping the pulley and getting the wiring pigtail. I used a stock alternator from an 88 v6 in my 84. Do not try to go with one of the oversized ones (CS140)....it will hit the intake on the 2.5.

The swap was pretty straightforward...mine is an auto, so it had to come out the top. The upper alternator bracket isn't that difficult to remove....but don't even think about removing the lower one, those bolts also hold the engine mounting bracket.

quote Originally posted by Blacktree: Just FYI, the '87-88 Fiero 4-cyl uses a CS alternator. It uses a serpentine belt, whereas yours uses a V-belt. So if you swap pulleys and grab a wiring pigtail, you should be good to go.

No. 87-88 Fiero 4-cyl alt has wrong front case. It has 120° mount points.

Old L4 use same alt as V6, 180° mounting, shown above. Need correct V pulley.

OK, thanks for the correction.