Ground Location for Sundown SAZ 2500d

[AndrewHD 10+ year member]

Hello people. I have a 2005 Impala and am planning on re-grounding my Sundown SAZ 2500d. Before it was grounded with 1/0 gauge to thin sheet metal near the spare tire well. I have been told by many that I need a better ground for such a beefy amp. Would the strut tower or seat belt holder bolt be a good ground? I only have a single D3400 up front and don't want to add another in the trunk. Please give me your insight on this. Thanks everyone. - Andrew

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[neo_styles 10+ year member]

If you're willing to run back up to the front, the negative battery terminal will make your best ground.

 

[cdc351jeferson 10+ year member]

Strut tower sanded down is fine that's where you do big three anyways

 

[AndrewHD 10+ year member]

I thought that ground wires need to be as short as possible. But you guys are saying its ok to run a 10 foot wire up to the front battery? This car is unibody so that makes sense just wanted to confirm it. Thanks guys.

 

[neo_styles 10+ year member]

Electrically it's the same point. You can always fuse it closer to the amp and again close to the battery.

 

[AndrewHD 10+ year member]

I currently only have 1 fuse at the battery positive (1 foot away) running back to the amp in the trunk. Will I still have to fuse the negative line that I run as well?

 

[NASTY08IMPALA 5,000+ posts]

Run frame in back to amp ..no need to do a long negative run..and do the big3

 

---------- Post added at 10:47 PM ---------- Previous post was at 10:46 PM ----------

 

No u dont fuse ground runs

 

[AndrewHD 10+ year member]

Hmmm ok do you know of any good trunk frame ground points in an 05 Impala?

 

[NASTY08IMPALA 5,000+ posts]

Yes drill thru the trunk floor and go straight to frame

 

[AndrewHD 10+ year member]

Thank you. I have a DC power 300 amp alt, Big 3 1/0 gauge, and XS D3400 and was still getting a little bit of dimming. I will fix the ground and report back as I 'm hoping the dimming will be reduced. My BTL 15 is at 1 ohm. Do you guys think I need another battery? Sorry for all of these questions this is one of the first times I installed a system over 1,000 watts.

 

[NASTY08IMPALA 5,000+ posts]

Yes put a g31 in the trunk ..good grounds make a world of difference ..make sure to ground straight to frame in front too

 

[AndrewHD 10+ year member]

For the Big 3 I just added 0 gauge wires to the existing negative ground bolt to the negative post and then added a wire from engine block to that same bolt as well. Is this correct? I will look into some g31 batteries if the dimming is not greatly reduced

 

[NASTY08IMPALA 5,000+ posts]

Depends where is the ground bolt .?..i do battery to frame ..battery to alt bolt ground and a power run from pos batt to alt wire

 

---------- Post added at 11:17 PM ---------- Previous post was at 11:16 PM ----------

 

U can get deka g31 blems for 80 bucks or so

 

[AndrewHD 10+ year member]

Ground bolt is a couple inches away from battery tray on the frame of the car. I just added 2 1/0 gauge wires to go to the negative battery post and engine block from that same bolt. I also have a run from alt positive to battery positive with 300A ANL fuse

 

[NASTY08IMPALA 5,000+ posts]

I would switch that from that same bolt to battery to bolt on the alt other than that ur good