1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

48 DHLA question

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Old 12-13-13, 01:58 PM
  #26  
seattle seven

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Do I need to regulate the fuel psi with the stock pump? only 4 psi...Want better gas mileage, runs great!
Old 12-17-13, 07:02 AM
  #27  
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Originally Posted by lwrobins
Do I need to regulate the fuel psi with the stock pump? only 4 psi...Want better gas mileage, runs great!
No regulator needed with the stock pump, but it will not flow enough fuel and WOT
for more than about 5 or 10 seconds. Otherwise in a pitch it will work fine.
Old 12-29-13, 05:13 PM
  #28  
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Originally Posted by Jeff20B
I'd have to agree. The only reason to keep an EFI pump is if you were boosting (so it covers the increased pressure required when under boost).

Since you are NA, you really should look for a low pressure high volume pump like a Carter. Look for the one with 72GPH and 3/8" fittings. They run like 6psi which can more easily be brought down to 2.5 without stressing the pump so hard.
THanks TG and Jeff, I remember when I was looking at installing a new fuel pump I was also looking at getting bigger hard and return lines which is why I went with a gsl se fuel setup because Lloyd had one lying around, so all I have to do is get a new fuel pump? is a new regulator required? is there another one that has a return?
Old 12-31-13, 11:03 AM
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If you buy a new pump, get the Carter like Jeff says and yes you'll need a regulator, and a fuel pressure gauge, and a return line. The Holley regulator has a port on the bottom for the return.
Old 12-31-13, 12:51 PM
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alright thanks drive fast...I already have the whole gslse fuel system installed in my car with a Mallory fpr and a gauge, just wondering if there was anything else other than the holley...so looks like i'll just have to get the carter and holley, I guess I did do something right a few years ago, I did want bigger supply and fuel lines and a great fuel filter by installing the full fuel setup from a gslse
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