RobbMc Performance Products News
Volume 13, Issue 1
October 2023
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New from RobbMc Performance Products!

Fuel Log with Bypass Regulator

Fuel Log with Bypass Regulator

Fuel Log with Built-in
Fuel Pressure Regulator

When using a Holley style dual feed carburetor with a high pressure fuel pump, you need some kind of fuel log and a pressure regulator. So we decided to design and build a fuel log with an integral pressure regulator. Available with a dead-head or bypass style regulator.

  • Large (.375" diameter) internal regulator orifice reduces flow restriction.
  • Dead-head (non-return) style regulator does not require a return line back to the tank and is ideal for high pressure mechanical pumps.
  • Bypass (return) style regulator is ideal for high pressure electric fuel pumps and can even be used with a fuel injection electric pump.
  • Fits most dual feed Holley carburetors including 4150, 4160 and 4500 series.
  • Distance between feed tubes is adjustable from 8-3/16" to 11-3/4".
  • Clears manual and electric chokes.
  • Clears most air cleaners including drop base.
  • Anodized housing and stainless steel plunger for corrosion resistance.
  • Special diaphragm allows use of gasoline and/or ethyl alcohol.
  • Adjusts from 3 to 10 psi.
  • Dead-Head version uses an o–ringed plunger to reduce pressure creep.
  • Small in size yet works with pumps up to 300 gph.
  • Fittings (-6AN and -8AN) included.
  • 1/8 NPT gauge port (plug included).

Another first from RobbMc Performance! And, as always, Made in the USA!

Dead-Head Fuel Log
Bypass Fuel Log



RobbMc Performance Pressure Regulator for Electronic Fuel Injection

Pressure Regulator for Electronic Fuel Injection

New Pressure Regulator for Electronic Fuel Injection

This bypass style pressure regulator is not just a standard regulator with a stiffer spring. Designed and built in the USA to specifically address many of the issues with other aftermarket regulators for EFI:Large (.375" diameter) internal orifice reduces flow restriction

  • Anodized housing and stainless steel plunger for corrosion resistance.
  • Teflon o-ringed plunger helps keep fuel in the lines when the pump is off to provide quicker restarts.
  • Special diaphragm allows use of gasoline and/or alcohol.
  • Boost/vacuum reference for supercharged/turbo applications.
  • Adjusts from 10 to 80 psi base pressure so it can be used with throttle body or port injection.
  • Small in size yet works with pumps up to 180 gph (681 LPH).
  • Optional mounting bracket attaches to regulator in eight possible positions.

Fuel Injection Regulator



New 1/2" Fuel Sending Unit applications



RobbMc Performance Products

775.885.7411

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