Let's talk upgrading alternators....

[turbonut85]

Anyone know the effects on the alternator of running a billet under drive crank pulley? Good or bad? Maybe I'm cooking these alternators due to spinning them too slowly?? (Alongside the extra load of the fans/etc...)

 

[Reggie West]

I rebuild them to put out 220 amps. It will put out 14.5 volts at 1000 rpms.

I charge $250 for them. Feel free to IM me if you like.

 

[turbonut85]

Update: Got the new Powermaster 47294 150a unit from Summit Racing. ($159 shipped) Other than having to re-clock the housing 90*, its a plug and play unit on the hot air. I swapped the pulley and fan off the one I had simply because I didn't like the look of the gold pulley/fan it came with. Had to shave the 1/8" lip off the back of the stock fan, and reused the spacer that came with the new alternator (it was a smaller diameter than the stock one) and everything lined up perfect. only down side to all this....It didn't cure my issue. Still was running low 12.xx volts at warm idle.....so I swapped pulleys from the billet under drive ones back to the stock ones and whalla...problem solved. Still feel better about the higher amp alternator though.

 

[Toby_Goodmk]

What is your voltage now?

 

[turbonut85]

14.2v at warm idle fans running and lights on.

 

[novaderrik]

huh... so those guys at GM knew what they were doing when they decided on the the pulley diameters... who knew?

 

[turbonut85]

huh... so those guys at GM knew what they were doing when they decided on the the pulley diameters... who knew?

One of the very few things they got right....

 

[mybuick]

90's 4.5 or 4.9 front wheel drive cadillac alternators are a direct replacement for the 84-85 cars and 120 amp

 

[Wahoo]

90's 4.5 or 4.9 front wheel drive cadillac alternators are a direct replacement for the 84-85 cars and 120 amp

For like the big 4 door ones? Brougham?

 

[mybuick]

For like the big 4 door ones? Brougham?

Yes any 4.5 or 4.9 car

 

[Chatmanboy]

90's 4.5 or 4.9 front wheel drive cadillac alternators are a direct replacement for the 84-85 cars and 120 amp

Looking forward to doing this swap but one question how did you wire it to the Cadillac alternat or with it have a different Harness?

 

[Wahoo]

Yes any 4.5 or 4.9 car

You dont have a part number by chance?

Im ready to go buy one but dont want to buy the wrong one

 

[Chatmanboy]

You dont have a part number by chance?

Im ready to go buy one but dont want to buy the wrong one

I actually got the alternaor from a 96 camaro 5.7L from auto zone. Part # dl1429-6-7. They usually on hand don't have to special order. The job was real easy. Get the bracket off a N/A gbody. Also grab the wiring harness from a alternator while your at the junk yard to save 10 bucks. I didn't reclock the alternaor just slapped it on and get 14.2 volts at idle.

 

[Wahoo]

I actually got the alternaor from a 96 camaro 5.7L from auto zone. Part # dl1429-6-7. They usually on hand don't have to special order. The job was real easy. Get the bracket off a N/A gbody. Also grab the wiring harness from a alternator while your at the junk yard to save 10 bucks. I didn't reclock the alternaor just slapped it on and get 14.2 volts at idle.

Were you still able to keep your AC compressor?

 

[Wahoo]

I actually got the alternaor from a 96 camaro 5.7L from auto zone. Part # dl1429-6-7. They usually on hand don't have to special order. The job was real easy. Get the bracket off a N/A gbody. Also grab the wiring harness from a alternator while your at the junk yard to save 10 bucks. I didn't reclock the alternaor just slapped it on and get 14.2 volts at idle.

NA Gbody? It doesnt matter what engine, or model?

 

[Chatmanboy]

Yes still use compressor and I believe so #25503134 will be on the bracket

 

[RUDE DOG]

Heres a link to the thread with pics of both alternator brackets http://www.turbobuick.com/forums/threads/alternator-bracket-problem.368048/
In case the link doesnt work heres a pic

 

[rodruckus]

Alternators Unlimited in Berkeley, CA

 

[Wahoo]

Excell automotice alternator part number 71346 worked fine for my hot air, i used the different alternator bracket shown above! Also wheb doing the swap i found where the engine ground wires are located. Basically under the AC compressor, so i was able to clean them up and use dielectric grease to make a good connection.


Upon initial start of the car my scan master showed 11.1 volts which upset me a little because thats the whole reason i wanted a better alternator. But once i blipped the throttle a few times the volts showed 13.6 volts for the first time ever!!!!

My BLMs and INT looked good but i only idled the car so far, its all apart for paint, so im happy!

 

[Robert1mcssgn]

Question? For the 90's fwd Cadillac 4.5 / 4.9 ALT how was it wired ? The pwr is there but which one would be ground and what about the extra wire, needed or not ? Already changed the pylley ready for install but would like to wire it up before it goes in...Thanks fellas