Considerations for battery replacements — by D. Watch a webinar for free on-demand! Stay up to date by signing up for Fleet Equipment newsletters. By Jason Morgan. By Fleet Equipment Staff. By Alex Crissey. Service: Prestolite Electric debuts new Prestolite. Podcasts Listen To More Podcasts. Sponsored Content. Replacing heavy-duty truck wheel bearings: Steel, aluminum hubs make a difference. What types of fuel pumps? My new car audio system to be installed in the near future, will draw amps from an alternator at The car is a Mazda 3 GS, and has a stock alternator, which probably has a max capacity of amps.
Therefore, I should upgrade the alternator, correct??? I have a chevy silverado band after replacing my alternator with a new higher amp alternator, my voltage is significantly less than before. I run 2 stereo amps about Which is better the high amp lower volt or the lower amp with higher voltage?
Hi there. The lights I have purchased have a wiring loom with it and a forty amp fuse capacity. My vehicle has a amp alternator. Do I have to upgrade my alternator? I appreciate your no nonsense approach with alternator applications.
This application involves, not a hot rod, but a Vixen SE motorhome that is undergoing a complete rebuild. The original drivetrain was the venerable Buick 3. Because the original motor, while a sweet runner with only 80, miles on it, is kind of anemic at HP in a lb. Of course the lead acid starting battery remains in place. With a smart charger integrated inverter probably a watt unit set up to handle the LiFePo type batteries and LiFePo units requiring Apparently some one makes a amp unit for the Buick 3.
If I understand things here, the new high output alternator will do its thing as usual charging the engine battery at what, Man, I sure hope this is making some sense. This small coach will not have propane anything—everything on board will essentially be electric—either 12 v or v. I just need some expert counsel here before I go and make some expensive mistakes. Hey Brian. It should help answer your question with some detail. Click here to read it.
Hi i was wondering about a mclarren 12inch sub i have installed in a ported box well constructed solid box how ever what would u recomend as far as wiring it up parralell or series i have it at moment series wired amp powering it is a pioneer gm amp 2 channel what is a better amp for this sub and wiring preferred thank you.
You DO have to worry about too much capacity in an alternator. This article is dangerously wrong. The problem is commonly seen in old vehicles. Suppose you have a 37 amp alternator. You leave your headlights on and it barely starts when you come back to it. The battery recharges off the alternator pulling as much as it can. As you pull the maximum available current from the alternator the voltage sags limiting the current to what the alternator is able to supply.
If you rev the engine the max current available increases and the lights get brighter. But still, the current sags a bit limiting the current to what the alternator can put out. Even when the battery is charged though, that amps at idle is not much. The head lights and the ignition may try to draw more.
Turn on the windsheild wipers and your pushing it. So you decide to take the plunge and buy one of those shiny new amp alternators from the hot rod parts website. You install it and everything runs great. Then one day you leave the headlights on while your in the store. You come out an hour later and fortunately, it cranks over a couple of times slowly, then catches and fires up. And suddenly, the cab is filled with acrid smoke and the smell of burning wiring.
If your unfortunate enough to immediately rev the engine to help get the battery to recharge like you used to do before you replaced the alternator, wires may burst into flames or the alternator gauge may literally explode. Its simple. The dash wiring in your vehicle was designed for that 37 amp alternator. It can handle the 37 amps that alternator might produce charging a dead battery when the engine is revved.
It might even be able to handle Maybe even 60, but things are going to start getting a bit warmer than you should be comfortable with.
But that dead battery drew as much current as the alternator could supply. At idle, that alternator can supply perhaps amps or more. Not only did the power output get much better over the years. The relative amount of power they can put out at idle increased too If you revved the engine up the alternator was able to supply the full amps.
Pulling amps through wiring sized for 40 will have spectacularly bad results. Its not pretty when it happens. Thanks for the sick info putting a treadmill with a h. Your email address will not be published. Your Website. Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed. Summit Racing Equipment. But how do you know? What Amperage Do You Need? During his year career in the auto industry, he has covered a variety of races, shows, and industry events and has authored articles for multiple magazines.
If you have questions about what kind of alternator your vehicle needs, feel free to contact Powermaster at or tech powermasterperformance. You can also contact Concept One for questions about your alternator and pulley kits. Important Stuff It is important to know that the alternator cannot output full capacity at idle. Also, electrical demands are generally higher at idle mostly due to engine cooling fans running. Connect with us.
Advertise Subscribe Contact Us. By Counterman Staff. Volts, on the other hand, are the force that pushes the electrons through the circuit like water pressure in a pipe. An alternator only produces a fraction of its peak-rated output at idle because output depends on speed.
In this article: Electrical , Tech Topics , Technical. Click to comment. Watch a webinar for free on-demand! Stay up to date with the latest Counterman news.
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