Is this car going to have fenders? Why don't you position the radiator to allow use of a mechanical fan? An electric fan doesn't really belong on a hot rod.
Well, in spite of all the great help provided by Jim, it looks like the use of a truck pump will not solve my pump to radiator clearance problems where i could run a fan on the engine side of the radiator. As noted in the photo, the pump shaft interferes with the electric fan. The interference would only be worse with the pump pulley installed. Even if I machined down (shortened) the pulley shaft, there is not enough clearance with the pulley installed. Using a smaller fan wouldn't work well either because it would only cover less than half of the radiator.
View attachment 77905
I haven't given up yet, though, and am looking at some other alternatives that would allow me to use a fan on the engine side.
Again, thanks to Jim for all of his help and support.
John
You could use an electric water pump with water inlet block off plates like the photos show, I made a bracket that mounted the pump below the passenger side head. My pump bracket utilizes one bolt hole on the head and the two tapped 7/16" bolt holes on the front of a truck block, these holes are on the front of my car blocks also. The pump I am using has two outlets so I plumbed one to each side of the block. I made a cad drawing of the block off plates and had them cut on a water jet out of 1/2" aluminum, then I had a buddy mill the fins in them. You can also see by the photos I didn't have much clearance either. The main reason I ran an electric water pump is because of my cam driven Hilborn fuel pump. This is just another possibility for minimal clearance, you will have to decide which option is going to work best for you Good Luck. PM me if there is anything I can do to help.
Steve
John: Thanks for the suggestions. As I understand your suggestion, I don't think item 1 would work, because if I cut the fan mount off the water pump shaft, I would also be cutting off the pulley mount and then would not have a way to drive the pump. I will take a look at your second suggestion.You may have run through this already, but can you get an electric fan in there if you either or 1) cut the fan mount off the water pump shaft, 2) position the electric fan so it’s motor (the thickest part) is offset from the water pump shaft?
Its on a race car that will be driven very little on the street (once or twice a year to a local cruise). That thing you are describing as a big snout is a Hilborn fuel pump for mechanical fuel injection, its driven off the camshaft. My radiator is a down flow and the 2 12AN fittings welded into the top tank are for radiator returns coming out of the Hilborn intake which were not plumbed when I took the picture. Lol I can't believe you saw that Sharpie, that fitting is one of the outlets that is now plumbed to the passenger side water pump inlet on the front of the block. On the bottom of the pump is a 16AN fitting that is the inlet and goes to the bottom tank. Yes building a race car is not a inexpensive venture, it is a love!Steve:
That's a pretty nice setup, but it looks like a lot of money/work. Is that for a street car that will see lots of highway miles or a race car? Also, I am not sure I understand what I am looking at. If the pump is under the passenger head, what is the big snout that extends from the timing cover (aligned about where the cam would be in the block)? It appears that your radiator is a cross-flow unit (much wider than the '33 Ford) - are the 2 fittings on the radiator outlets or one outlet/one inlet? I assume the electric pump inlet is where the "Sharpie" is sitting in the middle photo.
Again, I want to thank everyone for their interest and suggestions.
John