firewall bulkhead for wiring

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dartman 440

dartman 440

FABO Gold Member
FABO Gold Member
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Location
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what has everyone been doing for the thru firewall wiring when putting these hemis in ? is there even room to use the factory three plug bulkhead electrical connectors for the wipers and light harness? i was thinking of fabbing up something out of aluminum like they do for street rods , any comments or concerns , pics would be great , what would i do without this site , thanks to all . dartman 440 ed :D
 
If I was spending the time and money for a hemi swap there is no question........I'd get rid of the bulkhead connector somehow. Even if you want a big connector to isolate the engine side harness, you "could" fab a little cover, use a grommet and hang the connector up under the dash. After all, how many times do you think you'll pull it apart?

And.......I'm seriously thinking of that on mine, but I don't have the time. I'll be lucky whatever is left of my old age to enjoy "stuff" LOL
 
dartman 440 said:
what has everyone been doing for the thru firewall wiring when putting these hemis in ? is there even room to use the factory three plug bulkhead electrical connectors for the wipers and light harness? i was thinking of fabbing up something out of aluminum like they do for street rods , any comments or concerns , pics would be great , what would i do without this site , thanks to all . dartman 440 ed :D
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I guess it depends on what wiring you are using. I'm using FAST and they want you to cut 2" hole in the firewall to run all the wiring through.
Because I have the AC heater box, I didnt have much room to do that, so I ran the wiring thru 3 small holes instead. (They also dont want you to run cam and crank sensor wiring thru the same hole as the coil wiring.) To do that, I had to remove the engine side connectors from the harnesses so the wired would go through the smaller holes. Was a lot of work, but looks much better.
 
Im deleting my bulkhead. Engine harness will come in behind intake and lights,horn and fans will snake under fender top to the front.
 
I still have the factory bulkheads for the time being and drilled two new holes for my Megasquirt wiring. I really wanted to put in a new bulkhead connector for the Megasquirt stuff, but once I started pricing it, holes and grommets looked far more appealing for the time being. A bulkhead connector alone may not look like it costs much, but by the time you buy pins for both sides of it, it adds up in a hurry.

In a perfect world I'd replace the factory bulkheads with one or two modern style ones and run a third for my Megasquirt so they all match and look nice. Until then, the factory stuff works fine for what it's doing.
 
well i think im going with hot wire , and with all the ideas it makes me think about hiding the original wiring under the fenders and making a custom bulkhead . does anyone know how much wire you get from hot wire in relation to where you could put the hole ? thanks to all ed dartman 440
 
I got rid of the factory bulkhead and opened the hole enough I could get the connectors that attach to the computer through the firewall. I then made a split grommet to seal around the bundle of wires passing through the hole. This way I don't have to worry about any bad electrical connections through the firewall. I also added heavier gauge wires for the headlights along with many other smaller modifications that changed most of the wiring through the bulkhead.
 
I would have to rate it about 8 I spent a lot time just learning how to read the wiring diagrams and figuring out what to cut and keep. At first it seemed overwhelming, but I just took my time and went 1 wire at a time. I used the engine harness and a little bit of the harness from the interior, but could have gotten by without it. Getting the fuses and relays in the right places took some time as well.
 
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