Alternator Failures

takjak2 · 03-25-2015, 10:00 PM

This seems to be a common occurrence between the Grand-Am teams. As far as I know none of the "street" cars have experienced it. Can one of the pros comment on this? It it just a matter of heat? Revs? Running a different part?

GSS138 · 03-25-2015, 10:50 PM

No Pro, but probably just the brushes being worn at sustained high RPMS+heat. Probably fine in a DD scenario, but it could be a part that has a service life that is shorter due to the higher stress. When they core an alternator, brushes are replaced. I used to be into car stereos and when you pull a lot of power from your alternator, it has to spin faster to keep the voltage high. A few car stereo amplifiers can kill an OEM alternator in a year.

Dwnshift · 04-01-2015, 03:47 PM

Combination of things... Mainly vibration (remeber we are reving 8750) and heat for much longer periods of time.... But mostly the vibrations.

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03-25-2015, 10:00 PM	#1 (permalink)
takjak2 A True Z Fanatic Join Date: Feb 2011 Location: Sterling, VA Posts: 1,922 Drives: Legit Racecar 370Z Rep Power: 143	Alternator Failures This seems to be a common occurrence between the Grand-Am teams. As far as I know none of the "street" cars have experienced it. Can one of the pros comment on this? It it just a matter of heat? Revs? Running a different part? __________________ Mods \| Stuff \| Things \| Seat Time \| Nismo facebook.com/TeamSparrowSpeed

03-25-2015, 10:50 PM	#2 (permalink)
GSS138 Track Member Join Date: Mar 2013 Location: Mission Viejo, CA Posts: 769 Drives: '12 370Z 6M Sport Rep Power: 14	No Pro, but probably just the brushes being worn at sustained high RPMS+heat. Probably fine in a DD scenario, but it could be a part that has a service life that is shorter due to the higher stress. When they core an alternator, brushes are replaced. I used to be into car stereos and when you pull a lot of power from your alternator, it has to spin faster to keep the voltage high. A few car stereo amplifiers can kill an OEM alternator in a year. __________________ Current Mods: Vorpal Weapon +5. Last edited by GSS138; 03-25-2015 at 10:54 PM.

04-01-2015, 03:47 PM	#3 (permalink)
Dwnshift Track Member Join Date: Feb 2012 Location: Cincy Posts: 717 Drives: NISMO 370Z RC Rep Power: 15	Combination of things... Mainly vibration (remeber we are reving 8750) and heat for much longer periods of time.... But mostly the vibrations. Sent from my iPhone using Tapatalk GaleForce and Rusty like this.

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