100 AMP Alternator - Forums - Official C3 Vette Registry

SPONSOR AD

Support our Vendors! | Advertise Here

Topic: 100 AMP Alternator

in Forum: C3 Electrical

Already a Member?
Login
Not yet a Member?
Register for Free!

Back to top of thread

Our Sponsors help support C3VR

100 AMP Alternator (2/12)
8/20/10 10:22pm

ranger3

Lifetime Member
Send Private Message

North Charleston, SC - USA

Vette(s):
1975 L48 AT AC T-top

Joined: 3/20/2004
Posts: 4176

What additional aftermarket items have you installed that require the additional amperage?

Scott

Quote

100 AMP Alternator (3/12)
8/20/10 10:59pm

dskopp
Limited Member
Send Private Message

Oak Creek, WI - USA

Vette(s):
1981 Great White Shark. Red Interior, 350/190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vetts Car Club. 175,000 Original miles!!

Joined: 5/21/2008
Posts: 1958

Funny that you should post this today. I just had to replace my alternator!!. It was a tired puppy, I think it may have been the original one!! darn GM junk, only lasted 29 years!!! lol

Dan

______________

(click to see a larger image)

Quote

100 AMP Alternator (4/12)
8/21/10 1:15pm

Martins Vet
Former Member
Send Private Message

Vette(s):
1980 Silver. Complete Edelbrock performer package. TRW rear spring, new shocks. New Firestone Firehawk tires, Shift kit

Joined: 5/16/2010
Posts: 14

Hi Scott:

I have a 400 Watt mono AMP driving a 10 inch sub - not a lot compared to some of the high end systems around today, A/C, power windows and locks.

I believe the Marche underdrive pulleys could also be a concern as well however the instructions that came with the pulleys indicated the alternator pully drives 25% faster.

I am just not sure if the 3 wire OEM set up is going to be OK with the larger AMP alternator without having to increase the wire size between the battery and Alternator.

Any help appreciated

Thanks,

Martin

Martins Vet2010-08-21 10:27:33

Quote

100 AMP Alternator (5/12)
8/22/10 3:07pm

Jaws79

Lifetime Member
Send Private Message

Sykesville, MD - USA

Vette(s):
1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops

Joined: 4/27/2008
Posts: 4238

I put the 100 amp alternator ( I got a chrome one from Ekler's ) two years ago and did not change a thing. Its worked like clockwork since. Very little drop at idle. I'll see you at Carlisle!

Barry

______________
"Down on the Boardwalk...

(Click image to see a larger version}

Lifetime Member #181

Quote

100 AMP Alternator (6/12)
8/22/10 6:10pm

Hi Barry:

Great, good to hear.

I was looking at the wire for the battery connection and believe it is about a 4 or 6 Gauge so it would probably be adequite anyway. I would not be drawing a lot of amperage regardless, it would just be nice to not have the stereo base cut out at idle.

Now, if it just comes in in time - being sent by USPS to Canada Post - hopefully it will be here before the 26th when I leave.

Thanks again for your advice!

Martin

Quote

100 AMP Alternator (7/12)
8/22/10 9:28pm

Jaws79

Lifetime Member
Send Private Message

Sykesville, MD - USA

Vette(s):
1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops

Joined: 4/27/2008
Posts: 4238

Glad to help! Have a good trip! Luckily, I'm only about a two hour drive from Carlisle!

Barry

______________
"Down on the Boardwalk...

(Click image to see a larger version}

Lifetime Member #181

Quote

100 AMP Alternator (8/12)
8/23/10 8:21am

lukesvette

Lifetime Member
Send Private Message

HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6812

My battery on the alt wire fried with a 100 AMP unit when I upgraded - it seemed pretty light maybe 12Ga. Went to an 8 gauge wire and ran it directly to the battery. Cured the problem...

Quote

100 AMP Alternator (9/12)
8/23/10 11:26am

Interesting that your wire on the 79 would be that gauge. I wonder if it was changed for my year????

Quote

100 AMP Alternator (10/12)
8/23/10 8:58pm

ranger3

Lifetime Member
Send Private Message

North Charleston, SC - USA

Vette(s):
1975 L48 AT AC T-top

Joined: 3/20/2004
Posts: 4176

I think given the amperage, I would want at least an 8 gauge wire just for piece of mind.

Scott

Quote

100 AMP Alternator (11/12)
8/24/10 8:03pm

yostusota
Former Member
Send Private Message

York, PA - USA

Vette(s):
1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top

Joined: 5/18/2010
Posts: 1518

Hey all..sorry for getting into this so late! If you have one I would check the amp draw on the wire going to the battery with everything on max output with an inductive lead..I would make sure you don't overload that wire..if you don't have one I would still run another 8 gauge wire to the battery since you probably will come close to using close to 80 amps with everything on..the blower on high can hit 40 amps by itself..plus 20 amps on the stereo..the fuse on the amp may give you an Idea what it really is rated for max wise..
See you Friday
Rich

______________

My first parade at Carlisle 2010

Quote

100 AMP Alternator (12/12)
8/24/10 10:59pm

ranger3

Lifetime Member
Send Private Message

North Charleston, SC - USA

Vette(s):
1975 L48 AT AC T-top

Joined: 3/20/2004
Posts: 4176

I agree Rich. Good insurance.

Scott

Quote

Our Sponsors help support C3VR