Search the Community
Showing results for tags 'Voltage Drop'.
Sent the following to Mechman via their online form, but I figured I would post here to see if anyone else has any insight on this for me in the mean time while waiting for their response. "Hello, I purchased one of your alternators, via Sonic Electronix, for my 2008 Chevy Silverado. It has the 5.3L (VIN-J) and the alternator model is the 270A 8302270. I wired it with all 1/0 OFC cable, ensured the ground from the alternator to the battery runs through the Hall Effect sensor, used a 3/8” shorter belt (Gates) and replaced the tensioner for a new one (Gates). All works great except one thing, when the engine gets to about 3000-3500 RPM the voltage drops to battery voltage, then once back to idle the voltage comes back up. I'm not sure if this is by design or if there is some belt slippage at high RPM. If it is the latter, I cannot tell since it is a new install and I see no indication of belt dust yet. I wanted to get your input before I start going out buying anything. I eventually am going to order Gates Green Strip belts since I cannot get them locally, but I want to be sure of the length before I do. Right now, I have brand new Gate Micro-V belts installed since I can get those locally. The stock belt is 94" (K060935). Right now I have the 93-5/8" (K060930) installed, but the 93" (K060923) will fit, however with the 93" installed the tensioner is almost maxed, unsure if that is a factor or not. If you think I need a shorter belt, I will go out and purchase the 93" and if that solves my problem, I will be ordering the 93" Green Strip version (K060923HD). Thanks in advance and I hope to hear from you soon so I can resolve this." I should also mention I did try the 93" but never ran it with it due to the tensioner being almost maxed, so I returned it for the currently installed 93-5/8". I'm doing a new build to, so other than stock components, there are no aftermarket devices (amps, etc.) putting any additional load on the alternator other than a second battery.