Alternator Overdrive Pulley?
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
Are you having problems with it?
I never see above 11.5-12v at idle usually since I've had my underdrive pulley on, but it hasn't ever given me an issue under any normal driving situation. I've considered bumping my idle up a bit, but so far I haven't seen the need for it.
I never see above 11.5-12v at idle usually since I've had my underdrive pulley on, but it hasn't ever given me an issue under any normal driving situation. I've considered bumping my idle up a bit, but so far I haven't seen the need for it.
Last edited by FloydSummerOf68; Jun 1, 2011 at 02:41 PM.
Safety Car
Joined: Feb 2008
Posts: 3,712
Likes: 3
From: TEXOMA
St. Jude Donor '08-'09
same issue here. mine settles around 12.9-13.1, but i feel that is still enough, this only happens when sitting at idle for more than 10 mins with a/c on max and ect +190
I think its a heat soak issue because if i rev the engine the volts dont go up. but as soon as i start driving again and airflow restored the voltage comes back to 14.
-Carl
I think its a heat soak issue because if i rev the engine the volts dont go up. but as soon as i start driving again and airflow restored the voltage comes back to 14.
-Carl
Thread Starter
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
I'm not having and "problems" per say. I guess I just don't like it. Pump and injectors not getting the "proper" voltage, fan no moving as fast as it could, etc, etc.
11.5 seems really low Shawn.
I'm surprised you're not tripping "service charging system" messages. I'm talking like high 12's.
One cause for this low voltage is the wire from the alternator to the battery goes through the starter solenoid lug which loosens up. But I just replaced my starter. It got a little better but not as good as I'd like it.
11.5 seems really low Shawn.
I'm surprised you're not tripping "service charging system" messages. I'm talking like high 12's.One cause for this low voltage is the wire from the alternator to the battery goes through the starter solenoid lug which loosens up. But I just replaced my starter. It got a little better but not as good as I'd like it.
Melting Slicks
Joined: Feb 2004
Posts: 3,131
Likes: 148
From: Sugar Land TX
Why not just bump your idle up and see if that works for you?
But to answer your original question, I don't think anyone makes one for our alternators. I talked to Lee at ASP and the design makes for a fairly expensive pulley that most won't pay and installation isn't something the average can do. He could possibly make you a custom pulley if you want to go that route.
But to answer your original question, I don't think anyone makes one for our alternators. I talked to Lee at ASP and the design makes for a fairly expensive pulley that most won't pay and installation isn't something the average can do. He could possibly make you a custom pulley if you want to go that route.
Thread Starter
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
Na, I wouldn't be willing to pay out the nose for a custom pulley. I was hoping for something like "swap it out with the pulley from an F-Body". 
Idle is 750 right now. I guess I could go higher.
Idle is 750 right now. I guess I could go higher.
Safety Car
Joined: May 2011
Posts: 3,582
Likes: 46
From: va
you say its when the car is hot...
maybe the cooling fan is using that power? When my car is hot I will run the heater to get the fan circulating air to cool the oil down. During this time it is normal to see the voltage dip into the 13s.
maybe the cooling fan is using that power? When my car is hot I will run the heater to get the fan circulating air to cool the oil down. During this time it is normal to see the voltage dip into the 13s.
Last edited by el es tu; Jun 1, 2011 at 03:37 PM.
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Melting Slicks
Joined: Jan 2005
Posts: 2,326
Likes: 5
From: louisville "derby city" kentucky
have you thought about when the engine goes up high rpm? you may be buying alternators if you speed it up. also, you may get a overcharge msg. on your dic. i don't know this for sure.............just sayin.
Safety Car
Joined: Feb 2008
Posts: 3,712
Likes: 3
From: TEXOMA
St. Jude Donor '08-'09
I'm not having and "problems" per say. I guess I just don't like it. Pump and injectors not getting the "proper" voltage, fan no moving as fast as it could, etc, etc.
11.5 seems really low Shawn. I'm surprised you're not tripping "service charging system" messages. I'm talking like high 12's.
One cause for this low voltage is the wire from the alternator to the battery goes through the starter solenoid lug which loosens up. But I just replaced my starter. It got a little better but not as good as I'd like it.
11.5 seems really low Shawn.
I'm surprised you're not tripping "service charging system" messages. I'm talking like high 12's.One cause for this low voltage is the wire from the alternator to the battery goes through the starter solenoid lug which loosens up. But I just replaced my starter. It got a little better but not as good as I'd like it.
Pro
Joined: Nov 2007
Posts: 555
Likes: 0
From: Celina TX
http://www.texas-speed.com/p-146-asp...or-pulley.aspx
Anyone have any experience with these? My alternator tests fine but, that stupid "service charging system" keeps chiming. Thinking of buying a high output alternator but, having trouble spending $500 for an alternator.
Regards, Eric
Anyone have any experience with these? My alternator tests fine but, that stupid "service charging system" keeps chiming. Thinking of buying a high output alternator but, having trouble spending $500 for an alternator.
Regards, Eric
Tolero Apto Victum
Joined: Jul 2007
Posts: 9,669
Likes: 37
From: Woodlands TX
http://www.texas-speed.com/p-146-asp...or-pulley.aspx
Anyone have any experience with these? My alternator tests fine but, that stupid "service charging system" keeps chiming. Thinking of buying a high output alternator but, having trouble spending $500 for an alternator.
Regards, Eric
Anyone have any experience with these? My alternator tests fine but, that stupid "service charging system" keeps chiming. Thinking of buying a high output alternator but, having trouble spending $500 for an alternator.
Regards, Eric
Tolero Apto Victum
Joined: Jul 2007
Posts: 9,669
Likes: 37
From: Woodlands TX
http://www.texas-speed.com/p-146-asp...or-pulley.aspx
Anyone have any experience with these? My alternator tests fine but, that stupid "service charging system" keeps chiming. Thinking of buying a high output alternator but, having trouble spending $500 for an alternator.
Regards, Eric
Anyone have any experience with these? My alternator tests fine but, that stupid "service charging system" keeps chiming. Thinking of buying a high output alternator but, having trouble spending $500 for an alternator.
Regards, Eric
Also check out my two post in this thread for more info.
http://forums.corvetteforum.com/c6-t...ng-system.html
Safety Car
Joined: Feb 2008
Posts: 3,712
Likes: 3
From: TEXOMA
St. Jude Donor '08-'09
maybe it is a combo of both, but i removed the supercharger and relocated my battery to the back and ran a power wire all the way to the starter, than to the fuse box, added some extra grounds too... oh yea, added a tt kit.. but my voltage never drops below 13 volts now.. =)
-Carl
-Carl
Pro
Joined: Nov 2007
Posts: 555
Likes: 0
From: Celina TX
Did you mean to say you have an overdrive alternator pulley? I'll read up on your thread and see what I find, appreciate the response. I'm new to the C6 and want to mod (cam, heads and under-drive pulley) but, she's giving me some small problems that are making me nervous.
Regards, Eric
Tolero Apto Victum
Joined: Jul 2007
Posts: 9,669
Likes: 37
From: Woodlands TX
Gering,
Did you mean to say you have an overdrive alternator pulley? I'll read up on your thread and see what I find, appreciate the response. I'm new to the C6 and want to mod (cam, heads and under-drive pulley) but, she's giving me some small problems that are making me nervous.
Regards, Eric
Did you mean to say you have an overdrive alternator pulley? I'll read up on your thread and see what I find, appreciate the response. I'm new to the C6 and want to mod (cam, heads and under-drive pulley) but, she's giving me some small problems that are making me nervous.
Regards, Eric
