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Relocating battery to the trunk
Hitting a little snag here.. Pls halp Where the hell hell can I pass these bastards through the firewall? 0GA https://cimg1.ibsrv.net/gimg/maxima....cbf548c8e.jpeg |
Originally Posted by ChrisMan287
(Post 9195971)
Where the hell hell can I pass these bastards through the firewall?
https://cimg7.ibsrv.net/gimg/maxima....2421a8fff.jpeg https://cimg5.ibsrv.net/gimg/maxima....2f5563dea.jpeg |
There are some big rubber grommet accessible from the wheel wells. Remove the inner splash shields, you'll see them.
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Why, exactly, is it you’re wanting do do this? No criticism, just curious. |
https://cimg0.ibsrv.net/gimg/maxima....076eddf82.jpeg Trying to avoid using ring terminals as I don’t have a crimping tool for this gauge. I’ll remove the splash shields and check back in. Thanks guys. |
Mission accomplished thanks JSutter for the idea. I drilled some 3/4” holes behind the splash shield. https://cimg2.ibsrv.net/gimg/maxima....24119ed32.jpeg https://cimg8.ibsrv.net/gimg/maxima....213bf3fa6.jpeg https://cimg0.ibsrv.net/gimg/maxima....1492ee39a.jpeg Now to decide if I should run the wire down the passenger side and across the front or across the firewall and down the driver side... |
perhaps it would be superior to pass the cables thru rubber grommets installed in the holes in the body - so the insulation on the power cables doesn't scrape off
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I insulated everything with liquid rubber afterwards. |
Originally Posted by reallywildstuff
(Post 9196034)
perhaps it would be superior to pass the cables thru rubber grommets installed in the holes in the body - so the insulation on the power cables doesn't scrape off
And why down the passenger side? I get you're putting the battery on the right side of the trunk for weight distribution, but I would have ran it down the drivers side to make running it in the engine bay easier and cleaner. It's easier to hide those cables going across the trunk. And why run the negative? All you had to do was ground the battery to the chassis inside the trunk. Then ground the negative in the engine bay to the chassis somewhere as well, no? |
After I run the wiring to the driver side and put the carpet back I'm going to inspect where they pass through the firewall and see if the wires have moved. I will add grommets if I have to.
Down the passenger side seemed easier to me. I'm not worried about how they'll look in the bay I can always put loom over them to hide them if it bothers me enough. I was doing some digging and decided to go the two wire route for this reason: "In a dual wire solution you have the same large currents in the 12V wire, but you now have the exact opposite current (Kirchoff again) in the 0V wire returning to the battery. if you carefully run the two wires together then the magnetic field of one exactly matches the magnetic field of the other, but since the currents are opposite so are the fields. And they cancel perfectly. No magnetic field means no coupling or interference. There is still a strong field between the 12V and 0V wires but outside there’s nothing. So minimal interference occurs." -Source |
Originally Posted by ChrisMan287
(Post 9196077)
After I run the wiring to the driver side and put the carpet back I'm going to inspect where they pass through the firewall and see if the wires have moved. I will add grommets if I have to.
Down the passenger side seemed easier to me. I'm not worried about how they'll look in the bay I can always put loom over them to hide them if it bothers me enough. I was doing some digging and decided to go the two wire route for this reason: "In a dual wire solution you have the same large currents in the 12V wire, but you now have the exact opposite current (Kirchoff again) in the 0V wire returning to the battery. if you carefully run the two wires together then the magnetic field of one exactly matches the magnetic field of the other, but since the currents are opposite so are the fields. And they cancel perfectly. No magnetic field means no coupling or interference. There is still a strong field between the 12V and 0V wires but outside there’s nothing. So minimal interference occurs." -Source I'am curious about this now. |
Decided to run the positive and negative next to each other both in the cabin and in the bay across the firewall and over to the driver side. https://cimg0.ibsrv.net/gimg/maxima....488d68566.jpeg https://cimg3.ibsrv.net/gimg/maxima....f20b6ef79.jpeg |
Started setting up the ground distribution block last night. 0 GA wiring is going to stock ground point on the motor. Still have to add ground from trans to distribution block as well as other points in the bay and back at the battery from it to chassis. https://cimg2.ibsrv.net/gimg/maxima....172c122b3.jpeg |
Waiting for another distribution block for the positive so decided to work in the trunk. Set up the circuit breaker for the positive side and started playing around with mounting for the battery bracket. Using the stock bracket that will be cleaned up and painted wrinkle black. https://cimg4.ibsrv.net/gimg/maxima....dbc64b61c.jpeg https://cimg5.ibsrv.net/gimg/maxima....a88aa7a31.jpeg |
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I'm curious about what benefit's there might be from relocating the battery to the back of the car.
Seems like a lot of work. I'm sure you have a good reason for doing this. |
Originally Posted by JvG
(Post 9197700)
I'm curious about what benefit's there might be from relocating the battery to the back of the car.
Seems like a lot of work. I'm sure you have a good reason for doing this. It's being installed on the passenger side to help with weight distribution. Looking good Chrisman, keep up the good work. |
ive been wanting to ask: “Weight distribution” vis-a-vis “what” ? the weight of the driver ? |
Ok, battery relocation project makes sense now.
Cool project. |
That better be a sealed battery. If not, get a battery box and vent it properly.
Do you plan to go to the race track? There are some things you need to pass tech. |
It’s an AGM sealed battery (Bosch Platinum). |
Battery mounted :D I cut an access hole for the circuit breaker, trimmed the carpet around the tray and drilled holes through the scissor jack access cover for the wiring to pass through cleanly. https://cimg9.ibsrv.net/gimg/maxima....c47edefbf.jpeg |
Nice job!
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Buttoned everything up, flipped the switch on the breaker and there was no power going to the car. Confirmed that the breaker is bad even though it was new (open circuit no matter which way it's flipped).. ordered another one will check back in once it's done.
I really should have tested it beforehand :sadpace: |
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