Found a HO alt company

[jdium]

Originally Posted by earljail

Just make sure you find out at what RPM you need to be at to get 180A. Some HO alts need to the engine to be going 3000 rpm to put out the full amount, and put out the same as a stock alt at idle.

Thats true, and some aftermarket alts do slightly more than stock amps at idle, but at a Yaris stock idle (650 rpm?), there will never be much of an improvement without a drastic increase in alternator size. What matters most is the ramp up of amps with rpm's. If it takes to redline to hit max amps, you are not much better off. If you smoothly improve amps output from idle to 2500 rpm's, you have a nice alt. Just my

[earljail]

Originally Posted by jdium

If you smoothly improve amps output from idle to 2500 rpm's, you have a nice alt. Just my

Yeah, that makes sense. That way your battery will be recharged by everyday driving, not just a trip on the highway.

Despite my tach, I had forgotten that the Yaris idle is so low. Yeah, 650 rpm won't be spinning the alt that fast anyway.