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1973 F-250 - Turbo BBF - It's alive!

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  • BBR
    replied
    Fan works as planned. Still need to swap diff and install the driveshaft.

    I have not taken much time to work on the truck lately. I have been doing all kinds of stuff. Moving, dirt bikes, dirt bike trailer, home projects, raising SRT Jeep back up, installing a hitch on it and trying to get ready for Rocky Mountain Race Week.
    Last edited by BBR; May 26th, 2020, 06:36 PM.

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  • BBR
    replied
    I am currently slogging through the electric fan install. This radiator is pretty gigantic (the core alone is 24 x 26) so the fan does not cover the entire thing. I chose to drop it down on the lower portion so it will pull air through the radiator as well as the intercooler and transmission cooler.

    The slogging part is the wiring. I originally was going to run it off a toggle switch and relay, but then decided I really should just let the Megasquirt control it. I had to build a little circuit to allow the 5v fan output from the MS to trigger a transistor that controls the ground for the 12v relay coil. So essentially you have a tiny relay controlling a big relay. lol

    It is a good thing I picked the HHR fan because space is very limited. The crank pulley is about 3/8" from the back of the fan. Seems crazy in a full size truck. I tried to take a pic, but I couldn't get a good angle to really show anything worthwhile.

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  • BBR
    replied


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  • Beagle
    replied
    engine bay looks darn good to me... frame of reference for you from page 1 for comparison:
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  • BBR
    replied
    Fuel filler nech came in but guess what? The bolt pattern was too small. Never expected that to be a problem.

    So I did what any self-respecting DIY-er does. I drilled it to fit the old bolt flange. Now this may seem pretty straightforward on the surface, but in fact it actually was pretty complicated.

    The new neck came with a bolt flange with bolts welded to it that you slip inside the fuel cell and lift up and hold it in place with the gasket (because it fits tight. Then you simply both the neck on, no big deal.

    The old filler has a plastic flange on the inside of the fuel cell with individual bolts that you have to hold in place while you tighten the nut down on the outside. This is not a big deal because you can reach your hand through the hole and hold them.

    When you combine the two, the filler neck is too small to reach your hand in and hold the bolts. So you have to make a tool like this from an old 10mm wrench. It worked awesome.

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    Last edited by BBR; April 11th, 2020, 06:51 PM.

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  • BBR
    replied
    Haha no, but I do have the pressure switch for it in a box in the event we have another gas crunch!
    Last edited by BBR; April 8th, 2020, 07:18 PM.

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  • Admirall2
    replied
    But did you keep the fuel economy light?

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  • BBR
    replied
    Engine bay shots. Not a tidy as I would have liked, but as long as it works I guess it's ok.

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  • BBR
    replied
    Think of it as a gasoline powered diesel.

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  • Russell
    replied
    100+ in second is pretty cool. This thing will freight train. Big big block turbo freeway gears.

    I used to hear stories of guys street racing from a 90 roll. I never understood that at the time my car had maybe 120 HP.

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  • BBR
    replied
    Haha yeah. I want to drive this thing a lot so I want it to cruise at 75 mph with no worries.

    Plus it being a 9", I can always change them later if I feel they are too high.

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  • Russell
    replied
    Going for the 1/4 mile burn out?

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  • BBR
    replied
    I also put the spool in the spare 9". This one has 2.75 gears in it. They may be a little high, but should be better than the 4.30's that are currently in it.

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  • BBR
    replied
    It runs now.

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  • BBR
    replied
    I'm about to start playing with the efi, so I needed to put more fuel in the fuel cell. Seems simple enough, right? Nope.

    I went to open the fuel cell and the cap would not budge. That the heck? The release would turn, but it would not lift out. I finally managed to tear the top part off and get it out. The fuel cell cap apparently had a negative reaction to fuel vapor. The lower portion is no longer round, it is triangular and would not pull back through the round hole in the cell.

    I think I will replace it with a filler neck.

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    Last edited by BBR; April 3rd, 2020, 06:36 AM.

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