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Author Topic: Fuel Pump Vacuum  (Read 1988 times)

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Offline LOW $ RACING

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Fuel Pump Vacuum
« on: March 30, 2015, 03:29:25 am »
I have a 31 built with Mikuni carb ran the vacuum off the block and off the valve cover into catch can and ran vacuum off top of catch can to run the fuel pump
 .But that does not work motor is breaking up at full throttle so am going to come off intake .But was told I will need a Pressure Regulator to take it down to 11/2 p.s.i  .Any body running the Mikuni have any input would be most appreciated   
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Offline Jim Knutson

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Re: Fuel Pump Vacuum
« Reply #1 on: March 30, 2015, 09:20:13 am »
If the pulse is to strong on the intake, insert a smaller diameter piece of tubing inside the line you use now....just a little short piece is all you need.... just to weaken the pulse signal.
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Offline LOW $ RACING

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Re: Fuel Pump Vacuum
« Reply #2 on: March 30, 2015, 04:59:14 pm »
OK thanks
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