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Adjustable Pressure Relief Valve for Belt Drive Fuel Pump

Adjustable Pressure Relief Valve for Belt Drive Fuel Pump

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Details

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Q & A (2)

What's in the Box

Info

This pressure relief valve is the ideal bypass valve for use with a positive displacement fuel pump (typically not required for diaphragm type pumps). For use with any carbureted race engine using a belt drive fuel pump. This bypass valve is well suited for alcohol carburetors with gear type pumps.

Adjustable diaphragm lets you set fuel pressure while the Holley jet inside allows you to reduce idle fuel pressure without affecting operating pressure. Due to fuel pump variations, the jet is not included. The fuel pump relief valve features a stainless steel seat and bronze popitt valve for maximum resistance to corrosion.

  • Easily mounts directly to the carb fuel log
  • Adjusting screw on top sets high RPM fuel pressure
  • Easy pressure adjustments at 7-14 PSI
  • Adjustable to vastly different fuel pumps
  • Maximum fuel availability at the carb
  • 3/8" NPT ports

910-11579 Instructions (PDF)

Notes

  1. The bypass is tapped for a Holley jet to reduce fuel pressure at idle. In most alcohol applications this can be plugged or run with a small jet. With gasoline, you can reduce the idle fuel pressure by installing progressively larger jets. The condition and type of fuel pump will determine the jet size.
  2. Make sure to install a jet or plug. A plug can be easily made by plugging the hole in an old jet with a small screw or solder.

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Product Q&A

2 questions : 2 answers

1 answers

what is the pressure range, I need one that goes up to about 60 psi.

April 28, 2011

what is the pressure range, I need one that goes up to about 60 psi.

Answers

May 03, 2011
Clark
This customer is asking about our fuel pressure relief 910 11579. This bypass is not intended for 60 PSI. The adjustment range is 7-14 pounds. We carry a pressure regulator 910 13109 that is designed to control fuel pressure in the range of 40-75 PSI. I would suggest taking a look at 910 13109.
1 answers

can this be used like the old barry grant bypass that mounted to the rear of fuel log? Block mounted mech. pump idles 9psi. floods the needle & seats. we have a return line on the car. Gas 4bll. application.

January 02, 2012

can this be used like the old barry grant bypass that mounted to the rear of fuel log? Block mounted mech. pump idles 9psi. floods the needle & seats. we have a return line on the car. Gas 4bll. application.

Answers

January 06, 2012
Jason
THIS IS A BYPASS VALVE, NOT A PRESSURE REGULATOR! ********************************************************** ADDIT INFO: APPLICTN: For use with any CARBURETED RACE ENGINE using a BELT DRIVE PUMP. Very well suited for ALKI carbs with gear type (HI FLOW) pumps. The best place to mount this bypass is directly to the back of the fuel log. Return line Bypass [carb ] /--<---<---<--\ \ + + | /-->--\ | gauge-+ZZZZZZZ+---\ _______|_|_ | \-<---<--| fuel | [ Fuel | ] | log | ^ direction of [Tank~~~~~|~] | | | fuel flow [___________] \--->-->--->-+8+-->---/ The adjusting screw on the top of the bypass is used to set the HI-RPM fuel pressure!!!!!! The bypass is tapped for a Holley jet to reduce fuel pressure at idle!!!! - In most alcohol applications this can be plugged* or run with a small jet. - With gas you can reduce the IDLE FUEL PRESSURE by installing progessively larger jets. The condition & type of fuel pump will determine the jet size. **** MAKE SURE TO INSTALL A JET or PLUG!!! **** * a plug can be easily made by plugging the hole in a old jet with a small screw or solder! This is one of the very best fuel pressure control devices you can use! - with the most reliable pressure control! - easy pressure adjustments @ 7-14 PSI! - adjustable to vastly different fuel pumps! - maximuim fuel availability at the carb! It features a stainless steel seat, and bronze popit valve for maximum resistance to corrosion and maximum life!
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