LS Swap battery cable through firewall - Team Camaro Tech
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post #1 of 52 (permalink) Old Dec 26th, 16, 06:03 AM Thread Starter
DT
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LS Swap battery cable through firewall

Anyone use a bulkhead connector for their pos battery cable going through the firewall ?? I was also considering just a grommet and run the cable to the starter. I'm not sure I like the idea of a live connection at the firewall, even if its only live during cranking. I hope the protective caps on the bulkhead connector would prevent any accidental contact.

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post #2 of 52 (permalink) Old Dec 26th, 16, 06:10 AM
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Re: LS Swap battery cable through firewall

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Originally Posted by DT View Post
Anyone use a bulkhead connector for their pos battery cable going through the firewall ?? I was also considering just a grommet and run the cable to the starter. I'm not sure I like the idea of a live connection at the firewall, even if its only live during cranking. I hope the protective caps on the bulkhead connector would prevent any accidental contact.
I use these:

Through Terminal Junction Firewall Battery 3/8 Stud Bulkhead | eBay

Not sure what is going on with that link. LOL...

Don

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Last edited by Vega$69; Dec 26th, 16 at 06:35 AM.
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post #3 of 52 (permalink) Old Dec 26th, 16, 06:17 AM
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Re: LS Swap battery cable through firewall

Hey Donnie,
I am at that point too and have been trolling a lot trying to decide that. I am going to use a bulkhead connector. I think I am going to put it in the horizontal flat formed section of the passenger floor. What i am thinking over now is what bulkhead to use, i dont know that i like the one handled by summit but it will fit on that small flat. I am also thinking about a solid pass through connection for the negative cable. I intend to run negative to the block and am pondering the pros and cons of interrupting that cable. More bad chit happens when the system hunts for a decent ground than a decent hot.

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post #4 of 52 (permalink) Old Dec 26th, 16, 06:20 AM Thread Starter
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Re: LS Swap battery cable through firewall

Thanks guys. Don, no protective caps to prevent accidental contact ?? Steve, If your battery is in the trunk the ground should be as short as possible.

1969 X66 396 LeMans Blue, M20, 373 (Sold)
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post #5 of 52 (permalink) Old Dec 26th, 16, 06:29 AM
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Re: LS Swap battery cable through firewall

I run the posi cable underneath the car tight up to the frame rail and not through the passenger compartment. As mentioned it's only hot while cranking.

When i was planned and trying different routing I felt that running it through the wire chase then behind the kick and eventually through the firewall wasn't worth the effort.

I fixed your link. Lol
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post #6 of 52 (permalink) Old Dec 26th, 16, 06:37 AM
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Re: LS Swap battery cable through firewall

"Only hot while cranking" are you running the solenoid in the boot? If not that positive cable is ALWAYS hot.

---Nitrous Fed 468ci Big Block and m21 69 SS Camaro---
---163kg/140rwhp K3 GSXR 1000---
---TD42 GU patrol ute 6inch lift blah blah blah---
---Stock as a rock 91 F77 Daihatsu Rocky Ute---
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post #7 of 52 (permalink) Old Dec 26th, 16, 06:39 AM
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Re: LS Swap battery cable through firewall

Quote:
Originally Posted by enroh View Post
"Only hot while cranking" are you running the solenoid in the boot? If not that positive cable is ALWAYS hot.

---Nitrous Fed 468ci Big Block and m21 69 SS Camaro---
---163kg/140rwhp K3 GSXR 1000---
---TD42 GU patrol ute 6inch lift blah blah blah---
---Stock as a rock 91 F77 Daihatsu Rocky Ute---
Yes for purpose of this query we are running the F solenoid.
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post #8 of 52 (permalink) Old Dec 26th, 16, 06:40 AM
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Re: LS Swap battery cable through firewall

Still makes no sense to me. Main battery cable to starter will always be hot(Live)

---Nitrous Fed 468ci Big Block and m21 69 SS Camaro---
---163kg/140rwhp K3 GSXR 1000---
---TD42 GU patrol ute 6inch lift blah blah blah---
---Stock as a rock 91 F77 Daihatsu Rocky Ute---

Last edited by enroh; Dec 26th, 16 at 06:43 AM. Reason: Clarification
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post #9 of 52 (permalink) Old Dec 26th, 16, 06:52 AM
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Re: LS Swap battery cable through firewall

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Originally Posted by enroh View Post
Still makes no sense to me. Main battery cable to starter will always be hot(Live)

---Nitrous Fed 468ci Big Block and m21 69 SS Camaro---
---163kg/140rwhp K3 GSXR 1000---
---TD42 GU patrol ute 6inch lift blah blah blah---
---Stock as a rock 91 F77 Daihatsu Rocky Ute---
Battery in trunk. 12V bat cable to solenoid. Cable from solenoid to starter. 12v from ignition switch (start position) to solenoid trigger. separate fused wire from bat side of solenoid to fuse box power for the car.

The 12V cable from the solenoid to the starter is only hot while cranking.
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post #10 of 52 (permalink) Old Dec 26th, 16, 06:53 AM
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Re: LS Swap battery cable through firewall

I understand that. But the solenoid is on the starter is it not? So the cable from the battery in the trunk that goes to the solenoid on the starter motor is live all the time and as you say the short cable from aolenoid to starter is only live while cranking. Or am i missing something.


---Nitrous Fed 468ci Big Block and m21 69 SS Camaro---
---163kg/140rwhp K3 GSXR 1000---
---TD42 GU patrol ute 6inch lift blah blah blah---
---Stock as a rock 91 F77 Daihatsu Rocky Ute---
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post #11 of 52 (permalink) Old Dec 26th, 16, 06:55 AM
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Re: LS Swap battery cable through firewall

Quote:
Originally Posted by enroh View Post
I understand that. But the solenoid is on the starter is it not? So the cable from the battery in the trunk that goes to the solenoid on the starter motor is live all the time. Or am i missing something.


---Nitrous Fed 468ci Big Block and m21 69 SS Camaro---
---163kg/140rwhp K3 GSXR 1000---
---TD42 GU patrol ute 6inch lift blah blah blah---
---Stock as a rock 91 F77 Daihatsu Rocky Ute---
We install an additional Ford style solenoid in the trunk.

Click image for larger version

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post #12 of 52 (permalink) Old Dec 26th, 16, 06:56 AM
Josh
 
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Re: LS Swap battery cable through firewall

Cool. I gotcha now.

---Nitrous Fed 468ci Big Block and m21 69 SS Camaro---
---163kg/140rwhp K3 GSXR 1000---
---TD42 GU patrol ute 6inch lift blah blah blah---
---Stock as a rock 91 F77 Daihatsu Rocky Ute---
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post #13 of 52 (permalink) Old Dec 26th, 16, 06:59 AM
Josh
 
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Re: LS Swap battery cable through firewall

Cant say ive ever done that. Every car i have owned ive run the main csble to starter from trunk live all the time along frame rails etc. Never had an issue with shorting or damage. Ive Always run double insulated cable though.

---Nitrous Fed 468ci Big Block and m21 69 SS Camaro---
---163kg/140rwhp K3 GSXR 1000---
---TD42 GU patrol ute 6inch lift blah blah blah---
---Stock as a rock 91 F77 Daihatsu Rocky Ute---
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post #14 of 52 (permalink) Old Dec 26th, 16, 07:05 AM
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Re: LS Swap battery cable through firewall

Quote:
Originally Posted by enroh View Post
Cant say ive ever done that. Every car i have owned ive run the main csble to starter from trunk live all the time along frame rails etc. Never had an issue with shorting or damage. Ive Always run double insulated cable though.

---Nitrous Fed 468ci Big Block and m21 69 SS Camaro---
---163kg/140rwhp K3 GSXR 1000---
---TD42 GU patrol ute 6inch lift blah blah blah---
---Stock as a rock 91 F77 Daihatsu Rocky Ute---
1000s of guys run the hot all the time cable with no issues.

Some just want the peace of mind by not having it hot all the time.
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post #15 of 52 (permalink) Old Dec 26th, 16, 07:06 AM
Josh
 
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Re: LS Swap battery cable through firewall

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Originally Posted by Vega$69 View Post
1000s of guys run the hot all the time cable with no issues.

Some just want the peace of mind by not having it hot all the time.
Yeah this is true. Its definetely something ill think about doing in future builds. Adds an extra level of protection.

---Nitrous Fed 468ci Big Block and m21 69 SS Camaro---
---163kg/140rwhp K3 GSXR 1000---
---TD42 GU patrol ute 6inch lift blah blah blah---
---Stock as a rock 91 F77 Daihatsu Rocky Ute---
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