Did the B4C cars get a better altenator, and if so does anybody have the part #?? I tried searches and found nothing useful!! I just want something alittle better than the stock 105amp alt, and I want to be able to get it locally. Thanks

 

Think the B4C got a 140amp alt. Don't know the part number though....?

Si.

 

iroc-si, is it a direct bolt-on??

 

No idea. You'd probably want to upgrade the wires. Even the ones on my 94amp look a bit weedy, and are probably reducing the current capability somewhat. As it was an rpo option, I can't see it being anything else, but where you get one, I don't know. I think newer impalas have them too, but again I just don't know any more info.

Si.

 

Thanks for the help, anyone else able to shoot some info my way here??

 

You can get one from any starter/alternator rebuilding place. A good one is Keystone here in Toronto..they can rebuild your alternator while you wait and they have all the heavy duty parts like the HD regulators..etc

 

Steve, do you just tell them you need the Alt. from the police pakage?? I will call around and see what I can find, thanks man!!

 

Just say you want a heavy duty version rated at 140amp or similar. They'll know what to do and it isn't that expensive. You should upgrade the alternator wire that runs to the positive terminal as well.

 

Ya I will upgrade the wire for sure, thanks again for the info!!

 

The BC4 alt was normally a direct bolt on, no changes were needed. No need to upgrade the wire, you will never see close to 140 amps anyway. One thing to keep in mind, GM has 2 versions of the 140 amp unit. One looks like the standard CS-the BC4 unit had a large fan on the front. www.alternatorparts.com has a photo of the true BC4 unit on thier home page. From a 140 amp unit expect best case around 120 amps from 4-5k rpm. More importantly than the wire is clean connections. Our cars are old, make sure the connections at the starter are clean and tight as well as the batt. Also, www.acdelco.com has the numbers listed for the high output units.

 

Thank's Danno, I needed the part # cause nobody around here knows what I am talking about. :hail: :hail:

 

Here's a nice write up to installing one, complete with part numbers...http://sethirdgen.org/cs144.htm

 

That is a good article!!

 

Used them both, the CS130D really wakes up the charging system. The 100 amp unit works better since it has a more aggressive charging curve at lower rpms. It solved all my low rpm issues. It's really worth doing for a TG.

 

Ya, I have to do something because at idle my charge is waayyy too low!! The rebuilt units they sell around here are only 100amp, that's what I have been using and they suck.