Thread: Need some help tuning

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"I get a little ping after about 1-2 seconds into WOT."
Ping is DETONATION.

Fatten up the carb until it make tears in your eyes standing behind the car, then start leaning it down from there. You can't hurt the motor by being too fat, except for fouling spark plugs, but you can sure hurt it by being too lean. Alter the timing curve to bring in all the advance (34 degrees initial and centrifugal) by 2800. To read the plugs, you need to make a full-power blast, go to neutral and chop the ignition, coasting to a stop and pull the plugs right there. Any further driving after the full blast run will re-color the plugs to reflect the driving you did to get home, not the full-blast run. Tee off at the fuel inlet at the carb bowl and run a temporary 1/8" line back to the firewall and up through the lip of the hood to the cowl. Mount a mechanical, liquid-filled 0-15 psi gauge on the cowl temporarily with duct tape, cardboard and tie wraps so you can read it through the windshield as you drive. The carburetor needs only 4-5 psi, just enough pressure to keep the bowls full and as we have discussed before, more pressure can overpower the needle and seat and allow the fuel pump to blow raw fuel into the intake manifold, creating a tuning nightmare for you. Volume is more important than pressure.

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