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Found 2 results

  1. So a few weekends ago, Juan and I drove his Altima over to CE Auto Electric Supply to install a Big 3 kit on his car. It is a 2010 Nissan Altima 3.5SR, stock electrical system (160A alternator), with (1) Rockford T1500-1bd loaded at 1 ohm, and (2) Rockford T600-2 amplifiers loaded at 4 ohms stereo. The T600-2s are modified to put out max power at 4 ohms and do around 325W/ch at 4 ohms. In total, around 2800W. <Rant mode on> Yes it is a capital "W", named after James Watt. Also, I didn't put "W RMS" as there is no such thing. <Rant mode off> We tested the battery and found it to be weak (the Nissan dealer tested it and said it was fine 2 days prior). So first things first, we swapped out the battery for a new glass mat type. The reason for doing this was because during loud transients the lights would dim, and the CVT transmission would also trip out and make the car jerk. After the new battery was installed the problems were less, but still existed. So then we installed a run of 1/0 AWG to factory run of wire from alternator output to battery +. Then 1/0 AWG was added from alternator case to chassis of vehicle. Also, 1/0 AWG was added from chassis of vehicle to battery -. The results were fantastic, no more dimming, and the transmission behaves at it should now. See the before and after videos below which illustrate the voltage dropping problem reduced drastically. Before the upgrades: From 36 seconds to end After the upgrades: Two things can be noticed immediately. 1. The resting voltage is now 14.3V whereas it used to be 14.0V. The minimum voltage hit was 12.2V whereas it used to be 11.3V. To put a little math to it: 12.2V / 11.3V = 8% voltage gain. Since Watts is proportional to Volts squared we now have 17% gain in wattage AND the lights are no longer dimming Winning
  2. Tony Candela of CE Auto Electric Supply, Juan Rodriguez and I decided to do some testing with the AD-1 Amplifier Dyno to see what effects adding a capacitor to your system does. We did over 60 Dyno pulls with a Rockford T2500-1bdcp, without a capacitor, with a 1 Farad electrolytic capacitor (a real 1 F), and a 100 Farad carbon supercap. Test vehicle is a 2013 Jeep Grand Cherokee, 5.7 Hemi, 180 amp alternator, single group 49 AGM battery, all wiring 1/0 AWG copper. We tested each possible combination 3 times just to make sure our numbers were consistent, which they were. Video part 1 is continuous power testing, video 2 is dynamic burst power testing. Enjoy!!! Video part 1= Continuous power testing (uncertified dyno test mode). We do 4, 2 and 1 ohm dyno runs with no cap, 1 F cap, and 100 F cap. All tests in this video were made using the Uncertified Dyno Mode which is a continuous sine wave. We test a Rockford T2500-1bdcp in car, with no added capacitors, then with a 1 Farad aluminum electrolytic capacitor added, and then with a 100 Farad carbon supercapacitor added. RESULTS: No Capacitor: 1499 Watts RMS @ 13.07V into 4 ohms 2059 Watts RMS @ 11.84V into 2 ohms 2366 Watts RMS @ 10.83V into 1 ohm With 1 Farad Capacitor: 1489 Watts RMS @ 13.10V into 4 ohms 2024 Watts RMS @ 11.90V into 2 ohms 2358 Watts RMS @ 10.87V into 1 ohm With 100 Farad carbon supercapacitor: 1531 Watts RMS @ 13.13V into 4 ohms 2208 Watts RMS @ 12.25V into 2 ohms 2606 Watts RMS @ 11.30V into 1 ohm Engine RPM held between 2200-2500 for all tests. 1F capacitor didn't add any power on the continuous RMS test, actually lost a few watts probably due to the increased number of wire connections. 100F capacitor added more than 10% more power on the continuous RMS test Make sure to watch part 2, dynamic power testing (burst power). Hint: The results are different! --------------------------------------------------------------------------------------------------------------------------------------------------------- Video part 2= Dynamic burst testing (Dynamic Power Dyno Mode). We do 4, 2 and 1 ohm dyno runs with no cap, 1 F cap, and 100F cap. All tests in this video were made using the Dynamic Power (Burst) Dyno mode which is representative of musical peaks. We test a Rockford T2500-1bdcp in car, with no added capacitors, then with a 1 Farad aluminum electrolytic capacitor added, and then with a 100 Farad carbon supercapacitor added. RESULTS: No Capacitor: 1543 Watts RMS @ 13.80V into 4 ohms 2550 Watts RMS @ 13.32V into 2 ohms 3154 Watts RMS @ 12.76V into 1 ohm With 1 Farad Capacitor: 1613 Watts RMS @ 13.98V into 4 ohms 2666 Watts RMS @ 13.60V into 2 ohms 3426 Watts RMS @ 13.35V into 1 ohm With 100 Farad carbon supercapacitor: 1620 Watts RMS @ 13.95V into 4 ohms 2616 Watts RMS @ 13.65V into 2 ohms 3260 Watts RMS @ 12.91V into 1 ohm Engine RPM held between 2200-2500 for all tests. 1F capacitor didn't add any power on the continuous RMS test, but it OWNED the Dynamic Burst testing!! 100F capacitor added more than 10% more power on the continuous RMS test, but less than 5% on the dynamic burst test.
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