1001001
Well Known Member
I've been working on running conduit and wiring before closing up the back floors. I've made some decisions about routing, but when I review the OP-37 (wiring harness) drawings, I note that Van's has the main power wire to the starter relay penetrating the firewall in the very narrow space between the outer flange of the firewall and the F-1001M Angle, and surrounded by a simple plastic snap-in bushing (Note, I am not using Van's harness kit and am using 2 gauge welding wire for my main power and ground buses from the tail to the firewall).
Clearly, I'm not going to trust my firewall penetrations to plastic snap-in bushings. I have read through tons of threads here on firewall protection and firewall penetrations and have a very good idea of what I want to do for those cases. I don't think the space between the flange and the F-1001M is wide enough for a proper fire-resistant penetration.
My questions are:
1. Where have others run the main power wire through the firewall? Above the starter contactor area? Somewhere else?
2. Did you tie the main bus wire coming from the tail off to a cabin side terminal for feeding the main bus, or go through the firewall first, bond to the starter relay, then return another wire back through to the cabin to to main bus?
3. How many penetrations overall did you make? I presume a minimum of two--one for the main power and another for signal wires, ignition wires/mag grounds/etc. Should ignition conductors be isolated from other firewall penetrations? In this case I could see 3 or 4 total penetrations.
Anyone have some good overall pictures of their penetrations and locations? I have honestly been all over this site looking for these things, as well as many build logs, and am having problems finding what I'm looking for.
Thanks!
Clearly, I'm not going to trust my firewall penetrations to plastic snap-in bushings. I have read through tons of threads here on firewall protection and firewall penetrations and have a very good idea of what I want to do for those cases. I don't think the space between the flange and the F-1001M is wide enough for a proper fire-resistant penetration.
My questions are:
1. Where have others run the main power wire through the firewall? Above the starter contactor area? Somewhere else?
2. Did you tie the main bus wire coming from the tail off to a cabin side terminal for feeding the main bus, or go through the firewall first, bond to the starter relay, then return another wire back through to the cabin to to main bus?
3. How many penetrations overall did you make? I presume a minimum of two--one for the main power and another for signal wires, ignition wires/mag grounds/etc. Should ignition conductors be isolated from other firewall penetrations? In this case I could see 3 or 4 total penetrations.
Anyone have some good overall pictures of their penetrations and locations? I have honestly been all over this site looking for these things, as well as many build logs, and am having problems finding what I'm looking for.
Thanks!