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Thread: Engine stalls when revving

  1. #1

    Engine stalls when revving

    Recently got back my sbf from machine shop , had it stroked to 347
    Same time I changed heads, cam, tconverter
    Re assembled the components , engine fired immediately broke in the cam
    And every time I rev the engine 2500rpm + it bogs down then Stalls

    I've replaced wires coil and even the dizzy
    I chanced springs to bring timing on earlier
    I've changed the fuel pump, I have a regulator and gauge showing its working

    I'm still playing with the timing, as I'd like to get smaller bushings for my msd mech advance
    I have not got a vac reading on it yet, that's my next step, but I have ensured no leaks

    What do I look for next? I'm f*#%king baffled

    Here's my build so far
    Thanks for the help, appreciated

    >>>>>>>>> 23 T Bucket 2000lbs
    >>>>>>>>> 1968 Ford 302
    >>>>>>>>> Bore .030 stroked 3.4 = 347ci

    >>>>>> Probe industries Forged Flat top 2618 aluminum Pistons 10.6:1 (475grams)
    >>>>>> Scat Crank 9000 material
    >>>>>> Forged Scat 4304 I beam Rods 5.4length with ARP cap screws
    >>>>>> Pro Street Dampener & SFI approved 157 tooth flex plate

    >>>>>> *4 deg cam advance
    >>>>>>> Comp cam # 35-246-3
    >>>>>>> Duration at .50 is 230/236
    >>>>>>> 110 lobe separation
    >>>>>>> .523/.523 lift
    >>>>>>> Hydraulic flat tappet

    >>>>>>>>> 180cc alum SBF heads 60cc
    >>>>>>> 2.02 intake valves
    >>>>>>> 1.06 exhaust valve
    >>>>>>> Springs Seat pressure: 132 lbs. @ 1.750 inch,
    Open Pressure: 293 lbs. @ 1.250 inch
    O.D.: 1.430 inch, I.D.: 0.697 inch
    Dual valve springs with damper
    Approximately .540 inch max lift at recommended installed height
    >>>> 7/16 push rods
    >>>> 1.6 aluminum roller rockers

    >>>>>>>>> x4 duel IDF Webber Carbs,
    MSD Pro Billet Dizzy, Mallory Coil
    >>>>>>>>>21* Mechanical Timing, ? Total Timing Advance, All timing in at 2500rpm
    (X1 light blue spring, X1 light silver spring)
    110gph electric fuel pump

    >>>>>>>>> Trans 1968 C4, shifts @ xxx Rpm
    >>>>>>>>> Stage 2 shift Kit , w/extra clutch & A servo
    >>>>>>>>> 10" 2800 -3500 Stall TCS bracket master Converter
    >>>>>>>>> Rear End 68 Jag XKE
    >>>>>>>>> 3.33 Gears
    >>>>>>>>> Limited Slip
    >>>>>>>>> Independent Suspension
    >>>>> 1 5/8 primary tube w.3.5" collector Sanderson headers with Supertrapp adjustable exhaust
    >>>>>>>>> Tires 31x18.5x15 LT Slicks

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