Measure the OD of the welding cable insulation and get the proper size strain relief for the cable and then enlarge the hole to mount the strain relief.
strain relief
strain relief
Big 3 conundrum
Hi folks, how's it going?
So I'm having an issue with the big 3 on my car. I have a 60ah lithium battery and an Autotech 320A HO alternator so obviously better wire is next. I'm planning on running 2/0 OFC welding wire and it looks like it won't be a problem except the firewall. I have a post through on the firewall that connects both sides. Here are some pictures so you can see what I'm talking about:
![Hood Automotive tire Bumper Automotive lighting Vehicle door]()
![Motor vehicle Tread Automotive tire Tire Automotive exterior]()
When I removed the stuff, this is what I found:
![Hood Automotive tire Trunk Automotive exterior Gas]()
![Automotive tire Wood Bumper Wall Fender]()
Now as far as the wire from the alternator to the firewall, it is not just one wire, its a bunch. It looks like this:
![Automotive lighting Automotive design Map Automotive tire Automotive exterior]()
So here is my question: Am I going to need to drill a new hole in the firewall, put in a rubber grommet, and run the cable from the alt to the battery? I thought about adding a wire to the alternator and having it attach to the post through but since it would be touching metal, I think that would be really bad.
So what do you think, do I need to drill a new hole or is there something I can do that doesn't require that?
So I'm having an issue with the big 3 on my car. I have a 60ah lithium battery and an Autotech 320A HO alternator so obviously better wire is next. I'm planning on running 2/0 OFC welding wire and it looks like it won't be a problem except the firewall. I have a post through on the firewall that connects both sides. Here are some pictures so you can see what I'm talking about:
When I removed the stuff, this is what I found:
Now as far as the wire from the alternator to the firewall, it is not just one wire, its a bunch. It looks like this:
So here is my question: Am I going to need to drill a new hole in the firewall, put in a rubber grommet, and run the cable from the alt to the battery? I thought about adding a wire to the alternator and having it attach to the post through but since it would be touching metal, I think that would be really bad.
So what do you think, do I need to drill a new hole or is there something I can do that doesn't require that?
1 - 17 of 17 Posts
These type of grommets are really good. Cut the hole to the appropriate size, prime the bare metal, and install.
4 Cord Grip 2/0 Gauge Grommet Firewall Bushing Car Audio Power Wire 1'' Hole: Amazon.com: Tools & Home Improvement
4 Cord Grip 2/0 Gauge Grommet Firewall Bushing Car Audio Power Wire 1'' Hole: Amazon.com: Tools & Home Improvement
www.amazon.com
These type of grommets are really good. Cut the hole to the appropriate size, prime the bare metal, and install.
4 Cord Grip 2/0 Gauge Grommet Firewall Bushing Car Audio Power Wire 1'' Hole: Amazon.com: Tools & Home Improvement
4 Cord Grip 2/0 Gauge Grommet Firewall Bushing Car Audio Power Wire 1'' Hole: Amazon.com: Tools & Home Improvementwww.amazon.com
+1
Another thing to note is that between the two crimps and the two bolted joints, you're adding 20,30,50 ft of 4 ga wire to the circuit, voltage drop wise. Running a single piece of wire will always be better than having connections, if you can do it. I should have 4 of the pass-thru connectors discussed just before this for 1/0. I'll send you one, if you want...
Amazon.com: Conextlink 5pcs Waterproof IP68 Nylon Firewall Bushing Grommet Cable Gland Joint Adjustable Locknut Protectors for Power Cable (1/0 Gauge, Black) （19001） : Industrial & Scientific
Amazon.com: Conextlink 5pcs Waterproof IP68 Nylon Firewall Bushing Grommet Cable Gland Joint Adjustable Locknut Protectors for Power Cable (1/0 Gauge, Black) （19001） : Industrial & Scientific
www.amazon.com
1 - 17 of 17 Posts
