jlach993
Full Access Member
Has anyone come across a better alternator than the stock Denso 150amp OEM one? I've seen 250amp ones at 1.5k rpm for the LR3, but nothing solid for the LR4. There is one company that makes a 240 and 320amp alternator for the LR4. I'm really skeptical of them and think that their alternators only make that amperage at like 6k rpm which is useless to me. I tried messaging them as well with no response which makes me feel even more skeptical. I have many electrical add ons and a killer 2000 watt audio system (upgraded speakers and tweeters on its own aftermarket amp and 2 15inch subs on its own amp). With all of them working at the same time, my battery voltage dips to 11.3 when running...not good. I did the wiring upgrade already going from the alt to the battery and beefed up the ground cable, but i think the OEM alt is just not up to the job. When using the front windshield heater especially, the entire truck lights dim and the engine idle dips as well briefly. When everything is turned off and the truck idles i get about 14.5 with the stock alternator, so it's definitely underpowered. Any ideas people? thanks!