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The 98GT - 4pointsix to 4sixzero

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  • #61
    To be honest, I trust Randy's opinions more than Scott's. He owns: http://www.rmcompetition.com/ and is more of a race engine guy. He does the Engine Master's thing just about every year.
    Life is short. Be a do'er and not a shoulda done'er.
    1998 Mustang GT https://bangshift.com/forum/forum/ba...ix-to-4sixzero
    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


    • #62
      Originally posted by Beagle View Post
      I'm stuck between "Cool!" and "WTF?"... lol. Interesting range of parts there, iron truck head and a Victor / Dominator? I'm guessing there's not much port wall thickness left - that's a lot of intake valve to support. RPM much? "large cam" .. yeah, the kind that has numbers at .050 like the advertised numbers on the junk I look at!
      These are big motors not wimpy little small blocks. A 2 1/4" valve won't kill the velocity in the port all by itself. If you put one of those "weak suck" cams it it the valve won't be open long enough to let it idle properly

      Beagle likes this.

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      • #63
        Randy is a bad influence, just like you. ha! Good grief, all I wanted to do was throw a bucks down 460 in a truck. Go EFI they said, it'll be easy, they said... lmao. I need to get this mamby cam pile of parts running before it turns into Project: Scope Creep. The temptation to cut the seats, 2.11 / 1.77 Pontiac RA IV valves (that's one of Randy's contributions), and breathe iron dust for a week is strong. I'm also fighting the urge to have them cut .030, cheap compression. Then it needs more cam, then it needs more valve spring.. then there's the whole stroker battle playing itself out in my skull. THANKS! lol... totally kidding, this is the stuff I enjoy thinking about.

        I think Randy is the guy who said "Most of the time when people ask for advice, they have already made up their mind and are just looking for approval" or something like that. I kind of laughed at myself and thought "Guilty." I'm in between the 4500 RPM camp and the 6800 RPM camp, but mine will definitely be twenty plus degrees of duration more tow truck like than yours, at least this time.

        Are you going to hang those pistons or do you use a shop for that?
        Flying south, with a flock of bird dogs.

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        • #64
          Originally posted by cstmwgn View Post

          These are big motors not wimpy little small blocks. A 2 1/4" valve won't kill the velocity in the port all by itself. If you put one of those "weak suck" cams it it the valve won't be open long enough to let it idle properly
          It's a big valve for no bigger than stock F3te intake ports are is what I was thinking, lot of metal to remove to take advantage of it... and at some point I'd be worrying about the piston notch and whacking the exhaust valve with monster cam overlap ?
          Flying south, with a flock of bird dogs.

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          • #65
            Originally posted by Beagle View Post

            It's a big valve for no bigger than stock F3te intake ports are is what I was thinking, lot of metal to remove to take advantage of it... and at some point I'd be worrying about the piston notch and whacking the exhaust valve with monster cam overlap ?
            Yeah, I am sorry to keep pushing you in a direction your not interested in. I just believe a 460 or bigger (stroker) can tolerate more cam and intake than the "popular opinions" say.
            BBR likes this.

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            • #66
              Originally posted by cstmwgn View Post

              Yeah, I am sorry to keep pushing you in a direction your not interested in. I just believe a 460 or bigger (stroker) can tolerate more cam and intake than the "popular opinions" say.
              No worries! It's not that I'm not interested in that stuff, I'm on a different path though. I started out trying to spend less on the whole engine / transmission than most people spend on a set of cylinder heads... that's one reason for the mamby parts, it keeps me from having to buy more supporting parts. You know how that goes - buy a bigger cam than stock pedestal mount heads will handle, need adjustable rockers and maybe a conversion kit will work, or studs / guide plates / hardened pushrods, machine work, that kind of thing. Short version, I'm being cheap.

              Who doesn't grin when they hear 6800 out of a 501 inch mill? I'd love to see pictures of the port work done - I would put money on them being 8 to 10 pounds lighter than where they started. I'm actually very excited to hear they have enough potential to need a Victor and a Dominator!

              BBR's deal has more flexibility in it than my landscaper truck does... except for those LSR gears. Gak. By the time it gets up on the cam, he's gonna be going 80. haha.

              Last edited by Beagle; September 25, 2020, 05:53 PM.
              Flying south, with a flock of bird dogs.

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              • #67
                Gears are easy to change....
                Russell and Beagle like this.
                Life is short. Be a do'er and not a shoulda done'er.
                1998 Mustang GT https://bangshift.com/forum/forum/ba...ix-to-4sixzero
                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


                • #68
                  Kidding... longer burnouts. I bet they were miserable with the 4.6 though.

                  Flying south, with a flock of bird dogs.

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                  • #69
                    Up up and outta there!

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                    4.6's are BIG!

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                    milner351 likes this.
                    Life is short. Be a do'er and not a shoulda done'er.
                    1998 Mustang GT https://bangshift.com/forum/forum/ba...ix-to-4sixzero
                    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


                    • #70
                      I like where this is going....
                      BBR likes this.

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                      • #71
                        nice work indeed - hopefully you can get a few bucks for the 4.6 so you can put that towards a real engine...
                        There's always something new to learn.

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                        • #72
                          Getting a little attention from BS! Thanks Bryan!

                          https://bangshift.com/general-news/p...nd-add-a-zero/
                          Last edited by BBR; October 5, 2020, 05:36 AM.
                          SuperBuickGuy and Russell like this.
                          Life is short. Be a do'er and not a shoulda done'er.
                          1998 Mustang GT https://bangshift.com/forum/forum/ba...ix-to-4sixzero
                          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


                          • #73
                            I have been flip flopping about using the motor plate. These cars have a lot of plumbing along the front frame rails, brake lines, ac lines, hydroboost lines that will make using it a bit more complicated than the 83GT was. I am currently keeping my eyes open for a used tubular K or a Fox body k-member to swap in because my BBF mounts work with them. The sucky part is, I have had 2 stock fox k's in my possession in the past and gave BOTH to the local scrappers because I never thought I would want or need them! Oooof.

                            As far as the motor plate goes, I might trim it down and still use it to mount accessories. Not 100% decided on that, but it is something I am considering.
                            Life is short. Be a do'er and not a shoulda done'er.
                            1998 Mustang GT https://bangshift.com/forum/forum/ba...ix-to-4sixzero
                            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


                            • #74
                              Well that didn't take long. Lol. I put some feelers out for a Kmember and a buddy has an AJE that he is no longer using. Only caveat is that AJE's use their own engine mounts, but they do sell BBF mounts for $80. Or I could make my own.

                              milner351 likes this.
                              Life is short. Be a do'er and not a shoulda done'er.
                              1998 Mustang GT https://bangshift.com/forum/forum/ba...ix-to-4sixzero
                              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


                              • #75
                                Picked up the K after the Ford V. Buick shoot out. I am going to use the K with the stock springs, control arms and power rack.

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                                Life is short. Be a do'er and not a shoulda done'er.
                                1998 Mustang GT https://bangshift.com/forum/forum/ba...ix-to-4sixzero
                                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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