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1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

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  • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

    Custom hydraulic Comp Cams "turbo" cam for BBF . . . (Comp spec'd it)

    Advertised duration (int/exh) 283/287
    Duration @ .050 240/244
    Lobe Sep: 115.0
    Valve lift .585/.580
    We build an almost budget stock block for turbocharging“No replacement for displacement” has long been… Read More
    Last edited by Gateclyve Photographic; August 17th, 2018, 10:06 AM.

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    • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

      I like the COMP cam better as it has smaller advertised duration - the longer the valve is on the seat ( @ the same .050) the more power you can make
      It would be interesting to understand the .200 numbers to get a better idea of how aggressive the lobe is.

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      • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

        Well looky there. I forgot about the Tbird project.

        That custom cam makes a graph dang near identical to Comp's X4278H. It was a possibility until I discovered it costs almost $200 just for the cam. No thanks.

        Last edited by BBR; August 17th, 2018, 10:54 AM.
        Life is short. Be a do'er and not a shoulda done'er.
        1983 Mustang GT 552/C6 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
        1973 F-250 460/E4OD http://www.bangshift.com/forum/forum...uck-conversion

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        • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

          Yeah, it doubles the value of our engine . . . Just curious . . . What did the simulation program say it would do?

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          • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

            I did the comparisons using a 472" engine because this old program seems to have issues when you input large cubic stuff. Doesn't really matter though because I was interested in comparing cams and not choosing one based strictly on max power output. Plugged in some head flow numbers from a stock F3 head because I had them handy. 9.6:1 compression

            The X4278 467hp @ 5000 514 lb @ 4000
            Your Comp 458hp @ 5000 514 lb @ 4000
            The X4270 432hp @ 5000 523 lb @ 3500
            Lunati bare 431hp @ 5000 529 lb @ 3500

            FWIW. Really all within just little bit of each other.
            Life is short. Be a do'er and not a shoulda done'er.
            1983 Mustang GT 552/C6 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
            1973 F-250 460/E4OD http://www.bangshift.com/forum/forum...uck-conversion

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            • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

              The X4278 467hp @ 5000 514 lb @ 4000
              Your Comp 458hp @ 5000 514 lb @ 4000
              The X4270 432hp @ 5000 523 lb @ 3500
              Lunati bare 431hp @ 5000 529 lb @ 3500
              Is that software only modelling every 500rpm, or are the torque peaks that different? It'd be neat to compare the curves, but that's enough torque early that you may be very....er... 'traction limited'... for your accelleration. Good problem to have!

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              • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

                That's just from the text output. I think you can set it to every 100 rpm. The top 2 graph curves are very similar as are the bottom 2. I don't put a whole lot of stock in the numbers it spits out. I really just used it to compare the rpm ranges of the power curves.
                Life is short. Be a do'er and not a shoulda done'er.
                1983 Mustang GT 552/C6 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
                1973 F-250 460/E4OD http://www.bangshift.com/forum/forum...uck-conversion

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                • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

                  I've been looking at injector mounting options. I like being able to DIY stuff and have looked at a bunch of different ways of doing it.

                  I really like the screw-in bungs available in Australia, but they are too darn expensive to be worth it.

                  I've been looking at this thing because it is simple and because you have the option of changing manifolds if you want. The price seems reasonable, but I have not really found anyone that has used one. In fact, I have only see one engine build with one on it and it is a turbo 4cyl that is not running yet.


                  I've seen it referenced a couple times on the turboforums, but again, no real users.
                  Last edited by BBR; August 20th, 2018, 03:06 PM.
                  Life is short. Be a do'er and not a shoulda done'er.
                  1983 Mustang GT 552/C6 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
                  1973 F-250 460/E4OD http://www.bangshift.com/forum/forum...uck-conversion

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                  • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

                    That is interesting, basically a carb spacer with 4 injector bungs on each side - the integrated fuel rails are a nice touch, how do they come on and off?
                    There's always something new to learn.

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                    • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

                      Not entirely sure. haha But I like how this looks.

                      Click image for larger version

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                      TheSilverBuick and milner351 like this.
                      Life is short. Be a do'er and not a shoulda done'er.
                      1983 Mustang GT 552/C6 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
                      1973 F-250 460/E4OD http://www.bangshift.com/forum/forum...uck-conversion

                      Comment


                      • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

                        Don't forget Randal's trick of using a holley with a TPS on the throttle shaft as your throttle body
                        $265 isn't too hateful, I would think you could start with the injectors that came out of the 460?
                        Last edited by milner351; August 21st, 2018, 12:50 PM.
                        There's always something new to learn.

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                        • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

                          Still it's more than I really want to spend. AUS to USD makes it $193, but the shipping is like $56. Ouch.

                          The 460's injectors are 24lb-ers. Waaaay too small for forced induction and likely inadequate even for a decent running 552.

                          I'm mentally playing with some other options. Of course I still have the jig I used on the Ranger's intake if I want to go that route.

                          Click image for larger version

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                          Last edited by BBR; August 21st, 2018, 02:24 PM.
                          Life is short. Be a do'er and not a shoulda done'er.
                          1983 Mustang GT 552/C6 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
                          1973 F-250 460/E4OD http://www.bangshift.com/forum/forum...uck-conversion

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                          • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

                            Where does that spacer come from?
                            1997 Ranger 5.0L HO, GT40 heads/tubular intake, 65mm TB, 1.7rr, B303, Tri-Y headers, dual 2.5" exhaust, Flowmaster mufflers, T5 trans, Tri-Ax shifter, CenterForce Dual Friction clutch, 8.8 Traction Lok 3.55 gears, Cobra 13" front brakes, Cobra 11.65" rear discs.
                            1997 Mustang GT
                            sigpic


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                            • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

                              Proflow out of Australia. www.proflow.com.au

                              Seems like a procomp-ish sort of company.
                              Life is short. Be a do'er and not a shoulda done'er.
                              1983 Mustang GT 552/C6 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
                              1973 F-250 460/E4OD http://www.bangshift.com/forum/forum...uck-conversion

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                              • Re: 1973 F-250 - Workhorse Revival -> Sport Truck -> Turbo Truck (Well Over $5k Now)

                                That jig is amazing. For screw in injector bungs, I've contemplated drilling out NPT fittings.



                                The Holley throttle body works pretty well. If you leave the choke linkage on, just remove the upper butterfly it'll work decent for cold high idle as well in lieu of a IAC. Holley makes a bolt on TPS, but I took a late-80's GM TBI TPS and made a bracket to hold it and a chain connected to the throttle arm. It really only did two things, let the MS know when to use fuel cut and for the accelerator pump shot, so it's accuracy above say 30% throttle isn't much of a concern.
                                BBR likes this.
                                Escaped on a technicality.

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