LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Low pressure VS. High pressure fuel pumps ?????

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Old Mar 29, 2005 | 04:52 PM
  #1  
94heritageZ's Avatar
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Low pressure VS. High pressure fuel pumps ?????

Im looking at the Walbro 255 fuel pumps and there is an option for
low pressure and high pressure . Whats the difference ? Thanks
Old Mar 29, 2005 | 06:14 PM
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MEAN LT1's Avatar
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Re: Low pressure VS. High pressure fuel pumps ?????

I believe the low pressure pumps are for carbed applications which only requires like 6-9psi of fuel pressure. But your going to want a high pressure unite to supply your 38-40psi of fi fuel pressure.
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