Big 3 kit.

Well, ya, if all your grounds were good. Or if you don't have a bunch of extra electrical load. Personally I just run a Big 1 kit. 😉
Theoretical running a ground to the engine head results in better ingnion spark. Probably would need an oscilloscope to measure the change.

PAChevyCruze said:

Am I the only one who didnt notice a difference at all when this kit was installed? 🤷‍♂️😅

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My change is I no longer have the electrical gremlins I had when I purchased the car.

I guess it will help when I add a 10" sub and amp? 🖖

PAChevyCruze said:

I guess it will help when I add a 10" sub and amp? 🖖

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Probably.

I could tell a difference with my upgraded fan.

i did. light dimming went away in the cabin, speaker power increased or was more stable at high volume. i put purchased the high voltage coil pack from zzp that helped with engine spark. The laser iridium ix from zzp really woke up the car a few weeks ago with that high voltage pack. you should notice higher numbers on the battery voltage screen... maybe im not sure as i put an H6 battery in my cruze from cotco its a size bigger than what should be in there.

916LTZCRZ said:

you should notice higher numbers on the battery voltage screen

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Adding the big 3 kit without a doubt helps minimize voltage drops, that said the alternator output voltage is constantly adjusted by the ECM and BCM. Putting a number on any gains would take a bit of time with a good multimeter.

916LTZCRZ said:

.
H6 battery in my cruze from cotco its a size bigger than what should be in there.

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I couldn't agree more, IMHO the smallest battery anybody should be running is an H6. Especially since the H5 and H6 are the same price.

Johnny B said:

Adding the big 3 kit without a doubt helps minimize voltage drops, that said the alternator output voltage is constantly adjusted by the ECM and BCM. Putting a number on any gains would take a bit of time with a good multimeter.


I couldn't agree more, IMHO the smallest battery anybody should be running is an H6. Especially since the H5 and H6 are the same price.

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TRUEE. my voltage use to read 10.8 11.3 settle around 12 now its always up in the 13's then regulates to 12 but on the high side and the engine starts much easier with the H6 so agreed H6 should be stock/oem