Can someone please tell me the correct alternator for a 1994 Formula V8? The 8th digit from the right of the VIN is an R.
I am getting conflicting reports, and the dealer is unable to tell me exactly what it is; their info. is not that detailed.
I'm told that 140 amp is too much, yet everywhere I look, that's what is listed for the 5.7l. Anything less than 140 is shown for a 6 cyl.

thank you in advance

Why am I not surprized...can't even tell you the correct size--all 1994 and up LT1s came with the 140 amp. The only exception was the automatic 1993 which used around 120 amps. The correct size for your car is 140 amps. I really, really, really, really recommend this place to buy your new alternator with a dual diode bridge, and I emphasize the word "new". This is not a rebuilt alternator, it is brand spanking new and it is the only place that you will find a "new" alternator. Unless you have a need for a higher output, stick with the 140 amp--'need' means an aftermarket stereo with a big amplifier. Here's the website address:

http://www.alternatorparts.com/Extreme%20D...-144%20type.htm

This is the "high output" alternator that I used on my car and it was superb--very stable under all conditions and I had zero problems with it. They can deliver it to your house within a matter of a few days. Call them and talk alternators--they will advise you if you have technical questions.

Thank You
I had seen that site months ago, never bookmarked it, and thought it was lost forever!
I will give them a call ASAP. My alt. gauge is reading under 13 with the car running and no accessories on. I'm told its days are numbered.

That's actually good...in a way. If the gauge was reading over 13, say around 15, that would mean that a diode had failed and the alternator was pumping AC into the battery, which would burn out the battery fairly fast. A properly running alternator generates AC that is converted to partial DC with an AC component. The AC is absorbed by the battery and given off as heat. Not a problem as long as there is not too much AC going into it. However, lose one diode, and don't catch it, and the battery is toast.

GM spared all expense designing the charging system (well, most car companies design them the same way). That means that they use the battery as a filter for the AC. They could have spent a few more bucks and designed a system that output pure DC and saved us a lot of pain. However, it would have been more expensive to fix when and if it ever broke.

The Dual Diode Bridge alternators are a good way to go. The alternator will still output some AC, but at least, with two diode bridges, both bridges run cooler and last longer and so will the battery. Besides that, the Ricers will think it is really Hi-Tech, and unlike their stuff, it actually is. LOL!