Battery Cable Through Firewall

[socalsean]

Looking for the ideal place to pass a battery cable though the passenger side firewall for an under the back seat battery mount. I've read a lot of threads on the subject but haven't seen where the best location is to drill. Can anyone supply any photos of where people have passed the cable though the firewall? I plan on running the cable in the interior where the factory plastic fuel lines were installed. Thanks in advance!

Edited September 28, 2017 by socalsean

[Simeon]

I believe there is a hole covered with a tin grommet through the firewall under the brake pipes just behind your engine. Pretty sure it is there for RHD cars and needs to be broken through and perhaps drilled out slightly. 

[MildSeven]

The battery relocation was done by the previous on my car, with the wire passing through the firewall.

 

When I disassembled the car for restoration, I noticed that the hole used for the battery cable looked like a factory hole and not drilled.

 

I'll dig thought my disassembly pics to see what I can find.

 

EDIT: found a photo. It was to the left of the steering column. Don't mind the notes

 

Edited September 28, 2017 by MildSeven

['76mintgrün'02]

(+1 for what Simeon said -- although I did not pass a fat cable through this hole, merely a couple of vacuum lines and I will also run the AFR wires through there some day)

Edited September 28, 2017 by '76mintgrun'02

[Healey3000]

My approach:

 

[Healey3000]

15 hours ago, socalsean said:

Looking for the ideal place to pass a battery cable though the passenger side firewall for an under the back seat battery mount. I've read a lot of threads on the subject but haven't seen where the best location is to drill. Can anyone supply any photos of where people have passed the cable though the firewall? I plan on running the cable in the interior where the factory plastic fuel lines were installed. Thanks in advance!

Hi,

 

Just like crawling under a poorly supported car, running anything high-current along with the fuel lines gives me the willies.  One spark...

 

I ran my cable along the tunnel on the passenger side.  You can't see any bump in the carpet.  There's a very convenient opening between the vertical panel (heelboard) and the tunnel to pass a hefty cable through to the space under the rear seat.  I used it to place the battery on the right side.

Edited September 28, 2017 by Healey3000

[socalsean]

58 minutes ago, Healey3000 said:

Hi,

 

Just like crawling under a poorly supported car, running anything high-current along with the fuel lines gives me the willies.  One spark...

 

I ran my cable long the tunnel on the passenger side.  You can't see any bump in the carpet.  There's a very convenient opening between the vertical panel (heelboard) and the tunnel to pass a hefty cable through to the space under the rear seat.  I used it to place the battery on the right side.

 

The fuel lines will be replaced and run under the car.

[xr4tic]

Out of curiosity, why do you want to go down the passenger side instead of the drivers side?

[zinz]

becuz... VTEC ?  

[bluebmw]

6 hours ago, MildSeven said:

The battery relocation was done by the previous on my car, with the wire passing through the firewall.

 

When I disassembled the car for restoration, I noticed that the hole used for the battery cable looked like a factory hole and not drilled.

 

I'll dig thought my disassembly pics to see what I can find.

 

EDIT: found a photo. It was to the left of the steering column. Don't mind the notes

 

 

 

 

That's where I ran my wire too. 

[socalsean]

22 hours ago, xr4tic said:

Out of curiosity, why do you want to go down the passenger side instead of the drivers side?

 

I think the engine harness and battery cable will have more room to be arranged on the passenger side then the drivers. Plus the ECU will be located somewhere on the passenger side foot well. At least that was my thinking.