>While in Sacramento this weekend I took my ailing Holley 2 barrel to a
>carb rebuilding shop. I explained my problem, namely that the carb
>gaskets were all leaking, that gas was pouring out of the throttle
>shaft, and the car was getting lousy milage. I was informed that one
>possible cause for these faults was excessive fuel being delivered by
>the fuel pump. I never bothered to check the fuel pump, but of course it
>makes sense that if the pressure is too high, gas will find its way out
>at the weakest point. I was also informed that worn throttle shafts were
>generally not a problem with Holleys.
>
>I was also told that the rule of thumb for determining proper fuel
>pressure was to hold a quart jar at the end of the fuel line and let the
>fuel pump run for one minute. The jar should just fill up, and not
>overflow. This formula, coincidentally, is equivalent to the 15 gallons
>per hour rating listed in the Tiger Shop Manual for the stock fuel pump.
>
>I haven't tried this experiment yet, but my guess is that with the after
>market fuel pump on the car, it probably is pumping too much gas into
>the carb, and therefore causing the fuel leaks. Anyone else with a
>similar gas leakage problem may want to check their fuel pump pressure
>first.
>
>The carb shop I went to was called the Carburetor Factory, and they seem
>to know their stuff.
>
>Peter Silva
>'66 Alpine / Tiger conversion
Peter, try installing a fuel pressure regulator between the pump and carb.
that may help. You can get one at most speed shops or PEGASUS AUTO RACING
SUPPLIES (1-800-688-6946)
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