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    #1

    Red hot headers

    i have a 351 .030" over
    ported E7 heads
    484/512 cam
    1.72 rockers
    Edelbrock Performer RPM Air-Gap Manifold
    Holley 600 vacum secondary carb
    Full Msd ignition
    apprx 14deg base timing
    mid legnth headers

    i started it up today and after about a minute the #8 primary started to turn red hot. It has never done this before, no detonation, no unusual sounds, although i think it might have been idleing high (it was about 1800 RPM, i have not gotten around to setting a proper idle yet but it does not like to run under about 100-1100 RPM). What could cause a condition like this?
    http://secondhandracing.com/Home.aspx
    http://secondhandradio.com/

    R.I.P. Jason P Harrill 6-12-06

    http://www.grandmarq.net/vb/showthread.php?t=5634
    Tags: None
    #2
    now i am thinking that it is the carb, I think the shaft for the secondary butterflies is leaking and allowing air in and causing a excessivly lean mixture on #8 i also noticed yellow stains on the manifold right below there. if this carb is fuxored i will either have to pay to have it rebuilt by next weekend ($80 bucks) or swap my brothere 650 DP onto it.
    http://secondhandracing.com/Home.aspx
    http://secondhandradio.com/

    R.I.P. Jason P Harrill 6-12-06

    http://www.grandmarq.net/vb/showthread.php?t=5634

    Comment

      #3
      Thought so

      Need a holley? I got one sitting around...
      1983 Grand Marquis 2Dr Sedan "Mercules"
      Tremec TKO conversion, hydraulic clutch, HURST equipped!

      Comment

        #4
        sounds like a fuel delivery issue.......they will get super hot running lean also......take care of it so you dont toast a good engine

        1986 lincoln towncar signature series. 5.0 HO with thumper performance ported e7 heads, 1.7 roller rockers, warm air intake, 65mm throttle body, 1/2" intake spacer, ported intakes, 3.73 rear with trac lock, 98-02 front brake conversion, 92-97 rear disc conversion, 1" rear swaybar, 1 3/16" front swaybar, 16" wheels and tires, loud ass stereo system, badass cb, best time to date 15.94 at 87 mph. lots of mods in the works 221.8 rwhp 278 rwt
        2006 Lincoln Town Car Signature. Stock for now
        1989 Ford F-250 4x4 much much more to come, sefi converted so far.
        1986 Toyota pickup with LSC wheels and 225/60/16 tires.
        2008 Hyundai Elantra future Revcon toad
        1987 TriBurner and 1986 Alaska stokers keeping me warm. (and some pesky oil heat)

        please be patient, rebuilding an empire!

        Comment

          #5
          Sounds to me like you cigarete lighter is backfiring into your flux Capacitors resistor valve. :knowital:

          Comment

            #6
            I was gonna say lean too. Be careful, that shit will melt a hole in the piston. Standard stuff about checking for vac leaks at the carb base and intake gasket. I'd say pay special attention to the gasket if only one cyl is running hot.
            86 Lincoln Town Car (Galactica).
            5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

            91 Lincoln Mark VII LSC grandpa spec white and cranberry

            1984 Lincoln Continental TurboDiesel - rolls coal

            Originally posted by phayzer5
            I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

            Comment

              #7
              I think it is carb related since it is leaking fuel out of the shaft, due to the design of the intake the leak is directly above the runner for #8 im going to swap out carbs and see if that helps
              http://secondhandracing.com/Home.aspx
              http://secondhandradio.com/

              R.I.P. Jason P Harrill 6-12-06

              http://www.grandmarq.net/vb/showthread.php?t=5634

              Comment

                #8
                i have my edelbrock 600 you could borrow if you wanna lose some hp

                RIP Jason P Harril, we'll miss ya bro

                '80 Town Coupé
                '84 Towncar - Teh Cobra TC, 408w powered
                '16 Ram 1500 CC Outdoorsman, Hemi/3.92/8sp 4x4

                Comment

                  #9
                  If you think there is an intake leak somewhere there is an easy way to find out. Just take some carb cleaner and shoot all the seals, if the RPMs go up then you found a leak.

                  Comment

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