toofast928

Fed up with the Bosch 55 amp rebuild?! Do this:

Delco CS 130 Alternator. Cooling fan internal as well as external. 105 amps. 14.5 V at idle. I picked it up at Auto Zone for $70.00 Lifetime warranty. Tell the counter person it's for a 1988 Camaro, 2.8L. You also need a $13.00 delco pigtail connector from Painless Wiring). One wire to splice into.

BrianG

So, this works with the original alternator's exciter resistor in the pod, and keeps the charging system's warning indications happy?

heinrich

APPLAUSE!!!!!!!!!!!!!! Dude I and everyone here owes you a ... THIS is what will keep our cars on the roads ..... cheap Chebby parts.

Weissach

Did it bolt in?? Or did you have to do mods?? This is very cool. I think AC delco also has 160 amp alternators

Weissach

Factory pulley?? Same belt size??

BrianG

Details, man...... the world needs DETAILS!!

toofast928

Brian G: So, this works with the original alternator's exciter resistor in the pod, and keeps the charging system's warning indications happy? Yes, no additional resistor is needed, thou the Volt gauge is still 1 volt off.

The GM pulley was ribbed, I changed over to V style. (Motorsports crank pulley is V style).
I combed the "LESTER" book for hours. Their's no direct fit alternator to cross over to. The camaro style is as close as you can get. A 5 mm spacer is all that is needed on the top bolt. Pulley alignment is perfect.

The CS 130 is a 105 amp alternator. Aftermarket has a kit to change the stator and end cover. This bumps the amps to 140. I don't think the extended end cover would clear the oil filter. The other GM alternator is the CS 144 140 amps. Is bigger in diameter again I think it would have clearence problems.

At idle speed, all accesories on (including two electric fans and 300 watt amp) the system voltage is 12.5 at 60 amps. Off idle volts go to 14.3 and 75 amps.

Without the aux fan on, voltage at idle is 14.0.

BrianG

NICE!!
Could you do up a little wiring diagram for those of us electron-challenged types?

Even a little text description of which wire goes where??

toofast928

Porsche OEM wiring to the back of the Bosch or Paris Rome alternator is one eye lug consisting of two red wires >> Battery charge.
The other connection is voltage sense/exciter. Green wire I think.

The Delco connections are:
Large battery wire to Batt terminal.
Red wire of Painless wire adapter to batt terminal.
White wire of Painless adapter to be spliced into Porsche harness, Green wire.

Painless Wire Adapter P/N 30707

Rod Underwood

I notice that there is a difference between the 78-84 and the 85-94 alternators, but don't know what the difference is - wiring, physical configuration, attachment?. Does anyone know if this same conversion will work on the later version?

Thanks
Rod

BrianG

From having ordered a replacement rear cover for my '86 car, and having gotten one that didn't fit, I'd say that there is a case configuration difference. There wasn't a whole lot of actual size difference in terms of the face dimensions, though...

PorKen

Get 'er done! Nice work!


Painless Wiring #30707
GM Alternator Pigtail, CS style

Imo000

Or you can go to the junk yard and snip one off. I'm sure there are plently on 2.8L GM engienes out there.

sparks

Great swap toofast!! I spent $267 for a bosch unit, the delco peice is much better. One question not answered is cooling hose needed? My last alt. failed due to exhaust heat.

toofast928

Yes, cooling hose is installed. The internal cooling fan draws air in from the rear. Better cooling of the bridge and stator. But cooler air is still needed.