Uprating Alternator Options

[Chiefton]

Does anybody here know whether the alternators from the Lexus Models RX300 or GS400 would fit my Gen 6 Celica. I need a larger one as im still struggling with voltage drop from my sound system. Trying to get a similar bolt pattern so i can litterally swap them over, or is it not that easy??

Ideally looking for a 120amp alt, this wouldnt put starin on the engine as its almost double the standard 70 amp one installed currently??

Cheers for any advice

[DatDudeDEnd]

CAPS ARE A PIECE OF ****!! WORTHLESS..

Have you done the BIG 3? This is crucial to the electrical in your car. If you haven’t done this do it as soon as u can in 1/0 gauge wire.

Your system doesn't really feed off just of the second battery or the one just under the hood, your system feeds off the entire electrical circuit as a whole, of which both batteries and the alternator are all a part of, a second battery in the trunk will not affect the performance of your electrical at all it will improve it but it all comes down to the alternator in most cases, if your electrical starts getting strained the first that will suffer is your alternator, but this shouldn’t happen if your alternator can feed those demands if it cant provide the power that your electrical system is demanding most likely your alt will fail in time, and your batteries wont perform how they should. The alternator will always provide as much power as it's capable of into the circuit until more is needed, then the storage that your batteries have will discharge to make up the difference. after the discharge, the storage devices will pull current out of the circuit to replenish. Adding a second battery will allow you to run your system longer with the car off, but if you have the ability to drain two batteries with your system, then as soon as you start the car, the alt has to charge two batteries instead of one, so that’s another thing what will strain the alternator. You should try to get a H/O Alt and do the BIG 3. If your alternator can provide the amps/volts while playing @ full tilt to your battery’s you should have no issues.

I’m running 2500 wrms, with big 3, 180 H/O Alt from Excessive Amperage, Kinetik HC1800 under the hood and 1 power master d3100 on the trunk, all 1/0 gauge wire, at full tilt I don’t get dimming at all, my voltage never drops under 13.7 volts @ idle, I don’t have relays, isolators anything in that matter in between batteries, 80 percent of competitors I know don’t use them, just get an isolator if you plan on playing music while the car is of.

In most cases what will be affected is the alternator cuz that’s your power source, the alternator doesn’t know how many batterys you have etc it just sends out whatever the electrical system is demanding as a whole, anyhow If you're concerned about not having enough power, get a bigger alternator and do the big 3. Pushing an alternator to 90% of it's capacity all the time is what'll make it fail. Get a 140 - 180-amp alternator and do the big 3 if you haven’t, that would solve your problems, and I would suggest getting the biggest battery you could buy/fit on your trunk(kinetik hc2400 or power master d3100) a yellow top would be good too no doubt.

This post has been edited by DatDudeDEnd: Oct 25, 2008 - 3:12 PM