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

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  • AWESOME!!! Yeah, the compression is just a TOUCH lower than I expected...but not much! We were seeing 115-120psi on two different stock 75&77 Lincoln 460's. What is good is they are all close together, no dead holes! We did find that the intake gaskets were leaking internally on one of ours and letting a bunch of oil get sucked past into the heads. Did you stick a vacuum gauge on it? I would expect 20 or so?
    Did you happen to rev the motor with the timing light on it? Is the mechanical advance working correctly?

    It will be very cool to see the Holley on! I hope that fixes a lot of issues right there!

    Sounds like it should clean up NICE!! Just need to get you some warmer weather!!
    Last edited by andy30thz; December 15, 2013, 05:46 PM.

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    • Warm I figure it will be 115-120. Our elevation and typical sucky density altitude does not help.

      My buddy moparman63 is hooking me up with a Speed Demon 750 vac secondary carb that was just taking up space at his shop. Hopefully that will cure some of the ills. This Autoleak leaks down after it sits for a while and then you have to prime it to get it started. I read the cool exhaust is an indicator of cylinders not getting the proper a/f mix to fire. I'm guessing one side of the carb is probably clogged and not metering fuel like it should, causing the poor running.

      I did not put a vacuum gauge on it or check for mechanical advance. I will do that the next time I get to mess with it. I wanted to play with it again today (it was beautiful outside), but my bro-in-law was putting a new thermostat in his Durango and snapped a thermostat housing bolt off in the intake. Yikes! So I went over and helped him. We ended up having to drill and tap to the next size.

      Anyway, it was a good weekend playing with it. Can't wait for the next!
      Life is short. Be a do'er and not a shoulda done'er.
      1983 Mustang GT 545/552/302/Turbo302 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
      1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
      1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

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      • Post wash pictures?
        http://www.bangshift.com/forum/forum...-consolidation

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        • The only one I took time to take was the motor!

          Click image for larger version

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          Last edited by BBR; March 25, 2016, 01:52 PM.
          Life is short. Be a do'er and not a shoulda done'er.
          1983 Mustang GT 545/552/302/Turbo302 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
          1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
          1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

          Comment


          • Yep!! You're gonna need to get in there and do some hand scrubbing to get all that junk off. Well depending on what level of cleanliness you want to bring this thing too!!
            Jeez the paint on the firewall looks like NEW!!! So jealous of your rust free truck!!! As stated before, trucks of this vintage around here are usually unrebuildable due to being consumed by rust....

            I can't remember...is the 4300 a spreadbore carb? Will you have to use an adapter to get the holley on it? Don't forget to pick up the trans kick down linkage too! I know the cars had a weird EGR carb spacer plate, but I think the trucks didn't get any of that external smog junk, especially the 3/4 tons....
            If you need an adapter....would it be better to get a real squarebore intake...and while you have the intake off....swap the cam? You KNOW how these things snowball!!!

            Oh! Now I see all the trash in the cowl.... How the hell do you get that out?
            I did find this thread....
            http://www.ford-trucks.com/forums/87...om-debris.html
            Last edited by andy30thz; December 16, 2013, 07:20 AM.

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            • does the a/c compressor spin?

              There's a big goof plug right in the middle of the firewall under the cowl... can you pull that out and get a small vacuum hose in there? If not, at least a coathanger and drag all that junk to the middle and pull it out / vacuum it out?
              Flying south, with a flock of bird dogs.

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              • Some 4300's are spreadbore, but I am 99.9999% sure this one is not. If it is, I have a stock square bore intake sitting in the backyard I could use. But yeah, if the intake ever has to come off, I would be really tempted to put an aluminum intake, timing set and a Summit 3501 cam in it.

                After reading a couple of threads about cleaning them out I am SERIOUSLY considering cutting a couple of access holes and then making some block off plates. There's a ton of junk in this cowl and it looks to be very difficult to clean out. Need a hole big enough to stick my hand in!

                I have even really looked at the ac compressor yet.

                edit: Thanks for the link. That actually makes it look easier than I was imagining.
                Last edited by BBR; December 16, 2013, 08:02 AM.
                Life is short. Be a do'er and not a shoulda done'er.
                1983 Mustang GT 545/552/302/Turbo302 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
                1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
                1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

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                • after recovering from the hernia I would get pulling that battleship anchor of an intake off, I would never put it back on. :P
                  Flying south, with a flock of bird dogs.

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                  • Ah that's no problem. moparman63 is a crane operator, he can hook me up (pun intended).

                    Life is short. Be a do'er and not a shoulda done'er.
                    1983 Mustang GT 545/552/302/Turbo302 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
                    1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
                    1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

                    Comment


                    • Originally posted by BBR View Post
                      But yeah, if the intake ever has to come off, I would be really tempted to put an aluminum intake, timing set and a Summit 3501 cam in it.
                      I'm here to tell you DO YOUR CAM RESEARCH before doing anything with these 7.5:1 compression motors!!!
                      Most of the posts I read of guys using the K3501 with mostly stock compression...were not impressed.
                      But most guys using the smaller sum-k3500 are pretty happy! Thats what we used and I am here to tell you it was a NIGHT and DAY difference from the stock cam! But at the same time we recurved the dist, edelbrock performer intake & 750 carb, slightly stiffer valvesprings (it needed guide seals anyway)
                      http://www.summitracing.com/parts/sum-k3500/overview/
                      I've found good reviews of the smallest Lunati VooDoo cam as well in stock compression 460s.
                      http://www.lunatipower.com/Product.aspx?id=1678&gid=287

                      We currently are using a Randy Malik's custom "Street Rod" cam that has a noticable idle, but is focused on torque production. Not that expensive, but really budget either...

                      I can not stress enough, when you reseach camming a stock compression 460, you need to be VERY conservative, or you'll bleed off what little low end cylinder pressure you have!! Besides, this truck will never be fast, that's what the car is for. Big torque on 87 octane is the name of the game!

                      Comment


                      • Originally posted by BBR View Post
                        Some 4300's are spreadbore, but I am 99.9999% sure this one is not.
                        Hmm, I thought it was spread bore, but your visual inspection in person would trump my internet inspection.

                        4300 - Squarebore
                        4300D - Spreadbore.
                        Escaped on a technicality.

                        Comment


                        • Looking at that link, I think I did the same thing on my Skylark. Popped the passenger kick panel off, removed the A/C ducting valve and flapper assembly and then mucked out a ton of leaves, needles and general grim from the bottom. Use the blowing end of a shop vac (or I suppose an air compressor) to blow things downwards and occassionally upwards to break it loose. Then back to the vac side.
                          Escaped on a technicality.

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                          • Noted, Andy! Thanks for the input!

                            Tires! 2 y/o 265/75-16 BFG's $140 off Craigslist. 2 have a lot of tread, 2 have less, but they all look to be in very nice condition. I settled on used because I really need to get some tires on it but I don't want to drop a ton of cash on it right now. Just need to scrounge up some 16" wheels.

                            Click image for larger version

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                            Grand total: 720.50
                            Last edited by BBR; March 25, 2016, 01:57 PM.
                            Life is short. Be a do'er and not a shoulda done'er.
                            1983 Mustang GT 545/552/302/Turbo302 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
                            1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
                            1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

                            Comment


                            • nice score on the tires - these wheels are hard to beat for the price:

                              http://www.summitracing.com/parts/br...8035/overview/
                              Last edited by milner351; December 16, 2013, 10:11 AM.
                              There's always something new to learn.

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                              • Those are nice. Cragar Soft 8's look to be even cheaper. lol

                                Don't know if I want a black wheel or a shiny one though.
                                Life is short. Be a do'er and not a shoulda done'er.
                                1983 Mustang GT 545/552/302/Turbo302 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
                                1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
                                1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

                                Comment

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