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Old 06-09-2013, 02:07 PM
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Get the ignition timing sorted out starting here....

Carter, Edelbrock and Rochester carbs will tolerate only 5 psi at the fuel inlet before the pressure unloads the needle and seat and allows the pump to blow raw fuel into the intake manifold. Holley carbs will generally tolerate up to 6 lbs before doing the same thing. Tap off at the carb inlet and monitor the fuel pressure with a 0-15 psi mechanical gauge. If fuel pressure is excessive, using a mechanical pump, replace the pump with a common, simple pump from Autozone. If using an electric pump, install a regulator and adjust fuel pressure. A regulator generally will not work on a mechanical pump due to the pulsing.
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