Alternators
TECH Resident
iTrader: (3)
Joined: Dec 2002
Posts: 863
Likes: 0
From: Showing Italians the power of LS1
NO.
You still need to have the Alternator Pulleyed corretly. If not, the Alternator will not spin fast enough to provide the amount of current you would need. A bigger Alternator usually doesn't solve that problem by itself. They are designed to provide more output with the same input (spin the alternators at the same speed and the HO unit produces more current, but is a bigger Stator (heavier) and takes more energy to spin at the same speed)
The best bet is to Raise your Idle, or Get an Overdrive pulley.
You still need to have the Alternator Pulleyed corretly. If not, the Alternator will not spin fast enough to provide the amount of current you would need. A bigger Alternator usually doesn't solve that problem by itself. They are designed to provide more output with the same input (spin the alternators at the same speed and the HO unit produces more current, but is a bigger Stator (heavier) and takes more energy to spin at the same speed)
The best bet is to Raise your Idle, or Get an Overdrive pulley.
TECH Senior Member
Joined: Apr 2004
Posts: 6,157
Likes: 1
From: Texas
Give stinger a call. They may be able to make you one that works off of a lower rpm range.
Your best bet, mainly due to heat reasons, will be to get an over drive alt pulley if you do decide to go with the underdrive crank
Your best bet, mainly due to heat reasons, will be to get an over drive alt pulley if you do decide to go with the underdrive crank
TECH Regular
Joined: May 2004
Posts: 474
Likes: 0
From: chicago
Originally Posted by Snootch
my excessive amperage alternator has no problems at all keeping up with anything i throw at it. and i'd bet its faaar cheaper than a stinger unit as well.
TECH Resident
iTrader: (3)
Joined: Dec 2002
Posts: 863
Likes: 0
From: Showing Italians the power of LS1
Badhoopty, Bought the alt. huh? Nathan was a good guy to work with, he was pretty cool, I think even if they had been more expensive, I probably would of bought from him anyway. I got the same "cold shoulder" treatment from some of the other companies, they didn't even bother returning my emails/calls! Even though it doesn't put out full output at stock idle, I plan on putting a cam in, and raising the idle 100 RPM's. That way i'll never have a problem. The alt. already has a smaller pulley than the stock one does.
Trending Topics
We use ohio generator on all of our competition vehicles and I have had one on my daily driver for 120 of it's 125k and not trouble. But underdrive pulleys negate any good of upgrading the alternator. An ohio will put out 45 % of it's rated power at idle and 80% at 1000rpm
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo Nah I wouldn't think od the alternator would make any difference at all on power. IF it does the amount is so superficial that you will probably never notice it. Bc everything else is still underdriven. There are many mixed feelings on underdrive pulley's. I live in so texas and my car had temperature and charging issues along with poor ac performance during the summer in traffic or just idling for short periods of time. Just my .02
TECH Resident
iTrader: (3)
Joined: Dec 2002
Posts: 863
Likes: 0
From: Showing Italians the power of LS1
My opinion is: "I live in Florida. It gets hot as hell, and I don't like sweating my ***** off. I absolutely have to have lots of ice-cold AC. I also love my 1.4 Kw system as it quakes out the tunes. If i'm worried about the 5 or 10 horsepower or so of parasitic loss the alternator and/or AC compressor causes, i'll just have to make it up with some bolt-ons or some other mod." 