[Tom Vaught]

I posted this info in a different thread but it is good info for the Holley carb thread too.

The old Holley Blue Pumps were about all you had years ago to use for an Electric Fuel Pump.

You could buy 3 of the Stewart Warner electric pumps and gang them together and get decent flow. They had built in regulators.

The Holley Blue and Red pumps were terrible for sticking the flow vanes in the pump in the recessed position. Basically that means the pump does not flow the fuel properly. If you constantly cleaned them and used them for PURE DRAG RACING THEY WERE OK THOUGH. NOISY SUCKERS. Fuel Pressure Regulator flow was poor. You needed a minimum of two of the Blue Regulators even on a SB Chebby.

Mallory came out with the Mallory 140 pumps and they were good for Drag Racing with the Holley 7/16" control ball regulators. Easy 9 second fuel capability.

Holley Blue Pumps and Blue Regulators are #10 on my list of good fuel pumps (#1 being best). GOOD EFI Pumps being #1

The Mallory 140 stuff being maybe a #5.

Most of the higher HP fuel pumps that followed were Drag Only deals and died if you drove much on the street or trips. The Bosch External EFI pumps being the exception. They could put out 200+ gallons per hour at 75 psi and could flow 300 gallons per hour at a carb test pressure. All were Car Frame mounted from the OEMs so lots of noise unless you had the OEM Vibration Isolation mounting hardware.

If you are running 75 PSI fuel pressures 42 pound rail pressures naturally aspirated and 25 psi boost pressures the Bosch #140 pumps really shine. (140 is the last 3 digits of the part number). Most of the EFI pumps fall off pressure badly at the higher fuel pressure requirements. Lots of flow curves out there showing the performance of the EFI Pumps at higher pressures.

Any 255 liter per hour EFI basic pump: (1 liter is slightly more than a quart 4 quarts to a gallon), means the basic pump will flow 63 gallons of fuel at 43 psi and probably twice that amount at 7 or 8 psi so the Tanks,inc 255 liter per hour pumps make great carb fuel pumps and are CHEAP to buy. OEM durability too. 100,000 mile life. A In-Tank pump system is hard to argue with with today's e-15 and e-85 mixes out there at the pumps. That crap will kill a old style Holley pumps quickly.

Tom V.