Finally.
The engine harness took me forever for a number of reason, but the main one being my earlier indecision on electric fans. I spent a ton of time trying to figure out where to put the relays (and the AC drier) in the car and how to protect them from the elements, only to realize that I am better off sticking with the mechanical fan for my purposes.
Hear me out…
1. From what I’ve been able to find on the internet, the mechanical fan draws somewhere around 3,400 CFM at cruising RPM when below speeds that the fan clutch disengages and lets it freewheel. The best drawing electric setup I could find was two 12” High Output Spal fans that, together, would get me 3,740 CFM at optimal conditions. That’s great but they pulled 100 amps EACH when they start and 40 amps each when they run. The next best (strongest) option without the electrical consumption issue produced 3280 CFM. When I make changes I’m looking for better than stock.
2. If the mechanical fan really only saps 3-5 horsepower, then the simplicity, lower cost, and reduced wiring is more desirable than that gain. Yes I have a 100 amp alternator, but I don’t want to tax it more that I need to.
3. I am not a fan of the radiator shroud options for electrics. Anything that isn’t just a flat sheet reduces the clearance between the fan and the engine because the fans are all surface mounted. The mechanical fan protrudes into the old school shroud, and I can get a fiberglass replica at MSA. I did find an OEM metal one but it has been cut in two places and I think the guy wants too much for it.
However, the reason I kept going back and forth was I do like that electric fans can pass more air over the radiator at a stand still than the mechanical one because they are governed by the engine temperature rather than the engine speed. I figure that I can always put a 1630 CFM pusher fan on the AC condenser if I start having issues later, or I can always change this later if I have issues.
The engine harness is together, I have the connectors on the interior side, and now I can go on to adjusting the positions of zip ties that set up the the harness branches, which I hope to have done by a week from now.
@billgtp, thanks for the photos! That was super helpful