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BBR's 83GT - turbo 302.... now with EFI!

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  • Dang... will they give you grief at tech over the bell? Offhand, I think tighten up the suspension bolts is a much better idea!! Glad it stayed together. gulp.
    Flying south, with a flock of bird dogs.

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    • Tech? Who does that anymore? Haha. No worries about that. I mean just looking at it you would never know it wasn't something that was supposed to be there. 3/4" diameter.
      Life is short. Be a do'er and not a shoulda done'er.
      1969 Galaxie 500 https://bangshift.com/forum/forum/ba...69-galaxie-500
      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


      • Now that the converter is not choking the launch, it is time to make this carb work better. It has a pretty big stumble when the throttle is yanked open. If you hold the brake and bring the rpm up, you can throttle through it, but it is annoying when just driving around.

        I decided to re-think the carb a bit and try to not think about boost. As in, "what would I do if it was n/a and had this problem?". The stumble was obviously a lean condition, crutched by pumping the throttle and squirting more fuel in there. The accel pump cams are already really big, so the next thought was the power valve. It needs to open sooner. I checked my carb config I keep on my phone and sure enough, I put a 2.5 in it. I checked the vacuum at idle in gear and it was ~14 so I put a 6.5 in. I have a 2.5, 3.5, 4.5, 6.5, and 10.5 available. The low speed air bleed was a 72, so I got a couple of brass set screws out and drilled them to 67. This should richen up the low speed circuits a little. The hsab are 25's. I could probably go down on those to a 23 or 22 to bring the mains in a little earlier if I feel like it needs it.

        I took it out for a spin and there is no more stumble. Whoo hoo. It was a literal spin because if you footbrake it and bring any sort of boost up, it just spins the tires. It can still use some tuning, but I finally feel like it is actually getting better vs. just getting different, if that makes sense.

        Also, I don't have the vent tube extensions on it right now. Mainly because I can't find them but also because we don't have any trouble moving fuel at max boost. One thing I did do though was to rotate the angle cut vent tubes to both face the incoming air stream. The primary side was sorta aimed at it, but the secondary one was completely facing the carb hat wall. Will it make a difference? Idk but it makes me feel better.

        Oh and I put a new converter seal in this thing, but it still leaks. Boo.

        It also still has the annoying pop/misfire just before the boost really comes in. I am leaning towards a bad TFI or something else ignition related as the cause. This TFI emits a strange high pitched squeal when the key is on and the engine is not running, so it will be the first thing I check.

        Click image for larger version

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        Last edited by BBR; June 27, 2021, 09:36 PM.
        Life is short. Be a do'er and not a shoulda done'er.
        1969 Galaxie 500 https://bangshift.com/forum/forum/ba...69-galaxie-500
        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


        • Just a thought on the bowl vent tubes: Those things CAN come loose and find their way thru the engine - just ask David Freiburger (that's how they killed the Bonneville big block in the Camaro). Anyhow, there is an off-road vent tube that's single loop between the 2 vents with vents in the loop - had one on my 6 cylinder Camaro LSR effort. They seem to work fine and there;s no way it'll go thru the intake.

          Dan

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          • I thought it was the module making the noise. Now I'm not so sure. It stops when I pull the cap off and the tip of the rotor is warm. I suppose it could be noise generated by the fuel pump. I will disconnect the fuel pump later and see if that has an effect.

            EDIT: I pulled the fuel pump fuse and it still makes the noise.

            Life is short. Be a do'er and not a shoulda done'er.
            1969 Galaxie 500 https://bangshift.com/forum/forum/ba...69-galaxie-500
            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


            • Ok this thing is possessed. Key on, MS on, coil & coil igniter have power.
              1. Fuel pump fuse out - still has the noise
              2. Unplugged TFI - still has the noise.
              3. Pulled coil wire off coil - still has the noise.
              Life is short. Be a do'er and not a shoulda done'er.
              1969 Galaxie 500 https://bangshift.com/forum/forum/ba...69-galaxie-500
              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


              • Unplug the Alternator? Can't remember does it have an electric water pump (or was the BBF)? Electric fan? Just grabbing at straws
                http://www.bangshift.com/forum/forum...-consolidation

                Comment


                • It's really weird. There is an electric fan, but it was not on. Water pump is mechanical.

                  I got to thinking about misfires and remembered that the wrong dwell setting in Megasquirt can cause them. I looked at our tune and it was 5.5ms, which is really high. I went back and checked a tune from Raceweek last year. It was set at 3.5 and it worked perfect then. So maybe that is the cause of my pop/misfire.
                  Life is short. Be a do'er and not a shoulda done'er.
                  1969 Galaxie 500 https://bangshift.com/forum/forum/ba...69-galaxie-500
                  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


                  • sounds like a crystal singing... is everything still plugged in tight?
                    Flying south, with a flock of bird dogs.

                    Comment


                    • My 2bits.......
                      Free Electrons ALWAYS take ANY Route to Ground.......
                      Make sure Everything is Grounded, and/or "Bonded" to the BATTERY GROUND.
                      Your Ghostly Noise could be "Freed Electrons" screaming "Oh Yeah, Home Free" thru another circuit, i.e. Ignition pickups, crank position sensor, etc.
                      I found out that a Judson Brothers Electronic Mag/Coil Stores so much voltage, with the ignition off, master switch off, it Back Fed into the Starter Solenoid, and Ghostly would Crank the Car Over.
                      I had to put a Relay in to STOP it !!
                      Just a thought.

                      Comment


                      • Just got the EVER LOVIN' CRAP shocked out of me. Went out and turned the ignition and MS on and it was making the noise, grabbed the coil wire and pulled it off the coil... KAPOW! Sucker zapped me big time.

                        After I recovered, I realized the buzz is coming from the COIL. It is only amplified by the distributor when connected. So weird. I had read about TFI coils making noise but I was sure it was coming from the distributor.

                        Ok mystery solved. Haha.
                        Life is short. Be a do'er and not a shoulda done'er.
                        1969 Galaxie 500 https://bangshift.com/forum/forum/ba...69-galaxie-500
                        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


                        • Ouch!! I once bought a Bronco that PO thought had a flat cam lobe. It was a break in the coil casing, tick tick tick while it's zapping to ground... saw it at night with the hood open, so glad I wasn't digging around when it was running. I've had an HEI grab me from a tiny uninsulated area of the pliers (scratch in the coating) and 35 years later, I can relate still. POW POW POW POW POW POW, threw those pliers straight in the trash. These days I'd probably re-coat them, but I was, uh, upset. Glad it didn't send you into afib. :|
                          Flying south, with a flock of bird dogs.

                          Comment


                          • I monkeyed with it some more yesterday. I took the MSD coil off and installed the brand new Mallory TFI coil I got with all the EFi stuff for Greenbean. Heck if it didn't buzz louder than the MSD! Haha, so I just put the MSD back in. It only buzzes when the engine is not running. When it is running, it makes no noise at all.

                            The distributor cap is something I changed sometime after Raceweek. It was the cap that came on the Duraspark distributor we used for a while. It is black and has brass terminals so I though it would be better. Jonathan had a stock gray Motorcraft cap so I compared the two. I don't know if it makes a difference, rotor phasing maybe, but the towers on the black one are shifted about 1/8" counter clockwise on the distributor when compared to the Motorcraft one. I can't imagine that the difference is helping matters any, so I popped the Motorcraft one on for now.

                            If we get a break in the rain today, I will try to test drive it and see if we have made any improvement.

                            Click image for larger version

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                            Life is short. Be a do'er and not a shoulda done'er.
                            1969 Galaxie 500 https://bangshift.com/forum/forum/ba...69-galaxie-500
                            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


                            • (fingers crossed for you)

                              Dan

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                              • current draw?
                                Flying south, with a flock of bird dogs.

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