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Old 10-22-2006, 06:05 PM   #1
ScubaruImpreza05
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Have a Nice Day? Big 3 results...affect engine?

I just did the Big 3 to my car, an 06 i. I originally did it just to help out with dimming due to audio equipment, and to relieve stress on electrical charging system, therefore hopefully increasing the alternator/battery life. Everything went as planned, and I am actually going to add a little bit more wire to ensure excellent grounds, but for now I have noticed several things, but I am skeptical. Help clarify my skepticism.

1. negligible to non-existent dimming with ALL accessories on, high beams, folglights, interior lights on, defroster, and amped system all the way up. Voltage drops only got as low as 13.6 for a hair of a second, as opposed to a 14.2 voltage with nothing on at 2500RPMS.
2. Starting and idle is MUCH nicer, an effect I did not think I would encounter.
3. Now to the skeptical part. My car seems to respond MUCH nicer to acceleration and pedaling(drive-by-wire bog reduced), but shifting has become different. I know I know, electrical has 0% to do with shifting. What I am seeing is I have to shift at different points because the engine feels different. my 1-2 shift is more annoying, but even 2-3 feels like I mis-shift. I've compensated for it though. The car feels smoother, and, maybe I'm a reverse hypochondriac, but FASTER (skepticism)

I did remember once hearing about a test where a stock GC8 was taken around a track and got X-amount of time for the lap. They did a grounding/Big 3 kit to it, and sliced off approximately 2 seconds from the lap time. I cannot find Link, but it was on NABISCO somewhere.

People who have experience/knowledge/ proof either way, let me know. I'm really interested because the Butt-dyno says YES.
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Old 10-22-2006, 07:09 PM   #2
mummer43
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What's big 3?
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Old 10-22-2006, 08:26 PM   #3
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Big 3 is a way to increase the efficiency of the engine's electrical system by A.) grounding battery negative to chassis B.) grounding engine block to chassis, and C.) running a line of power cable from the alternator positive to battery positive, with a fuse.

Wire used should be 4 gauge or better, and chassis points should be cleaned up to bare metal.

In essence, the point is to allow for more surface area for your electrical system to operate on, allowing for efficient transfer of power throughout body. So you are producing the same power, with less stress on the alternator/battery.
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Old 10-22-2006, 08:27 PM   #4
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based on what he wrote I would have to assume grounding mod.. and its 3 biggest noticeable changes.
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Old 10-22-2006, 08:28 PM   #5
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Quote:
Originally Posted by ScubaruImpreza05 View Post
Big 3 is a way to increase the efficiency of the engine's electrical system by A.) grounding battery negative to chassis B.) grounding engine block to chassis, and C.) running a line of power cable from the alternator positive to battery positive, with a fuse.

Wire used should be 4 gauge or better, and chassis points should be cleaned up to bare metal.

In essence, the point is to allow for more surface area for your electrical system to operate on, allowing for efficient transfer of power throughout body. So you are producing the same power, with less stress on the alternator/battery.
beat me to it lol... I am going to be doing one on my 05 very soon. interesting stuff!! will post results as well.
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Old 10-22-2006, 08:46 PM   #6
ScubaruImpreza05
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Quote:
Originally Posted by SubyRSdriver View Post
beat me to it lol... I am going to be doing one on my 05 very soon. interesting stuff!! will post results as well.

Hey, do us a favor in audio forums and Nasioc in general, Do a voltage meter test before the Big 3, (turn on every accessorie, light, etc you can) at idle. The after big 3, do the same and post up differences. I didn't do this and I should have, since I have a voltmeter in my HU.

Also, it isn't 3 biggest changes, it is called big 3 because the 3 best possible spots to attain the best results. It could might as well be big 10 if you ground/modify 10 spots, but these posted are the minimal requirements for the best results.

OH, and here is my thread w/pictures for you guys:
http://forums.nasioc.com/forums/show....php?t=1118392
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Old 10-22-2006, 08:52 PM   #7
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Ok cool... I will definitely do that. I have a voltage meter in my radar detector. the car some times drops below 14.0 with just regular stock six disc radio on and low beams.. mostly when slowing down. I am hardly ever above 14.2 though. some people have recorded a full volt increase overall which would be pretty good. Will def let you know though.
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Old 10-22-2006, 08:57 PM   #8
ScubaruImpreza05
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ya, like I said in my car w/o the Big 3, I would easily see 12's, with it, I'm usually at 13.7 with everything on.
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