If you ordered a pump combo and did not install immediately, you need to check the power stud bolt for tightness. The Viton rubber compresses over time if not submerged in fuel.
This is a Stainless Steel Corvair sending unit mounted to a Vega-type in-tank electric fuel pump. We take great care in manufacturing these units and have the following features:
- Premium Turbine type Fuel Pump
- Nylon convoluted fuel hose (units produced before 1 Aug 24 have R10 rubber hose)
- Viton seals used on Power Stud
- PTFE fuel-safe electrical wire
- New Filter Included
- New Seal and Ring Included
- All electrical connections are crimped and soldered
- A 1/4″ male is provided for a slip-on terminal
- rated at 5-8 psi @ 12VDC
YOU MUST USE A FUSE BETWEEN THE PUMP CONNECTION AND THE FUEL PUMP RELAY!!!
We offer EM (61-64), Late (65-69).
Why an Internal Pump? They are hidden and highly dependable and these are the pumps specified for the 1971 – 1977 Chevy Vega. External pumps can be noisy and can usually be overheard at idle and emulate a mechanical pump “The Clunk-Clunk noise”. Our internal pump uses a turbine and does not create large pulses of fuel as solenoid-type pumps but may produce a light “whine” that some may find noisy. The fuel filter is off-set on the end of the pump to keep the pump off the floor of the tank to reduce vibration. Mechanical fuel pumps that don’t leak or fail are becoming hard to find and we think this is a good, long-term solution.
You should check the gauge calibration and operation of the sending unit against your gauge before installation. We test every sending unit for the proper Ohms before modification. MOST GAUGE FAILURES are ground-related… so check your ground while testing and installing. You must specify early or late as they have different gauge Ohms.
This pump assembly will work on any Carbureted Corvair. We recommend using the Revolution Fuel Pump Safety Switch https://www.revolutionelectronics.com/Products/Fuel Pump.html This will ensure that your fuel pump stops pumping in case of a wreck or engine stall. We also have a wiring schematic from one of our customers that shows how to wire to a Corvair. You may also add a pressure regulator according to your needs. Most carbs do not. If you need a fuel pressure regulator, they are available on Amazon for $21.99 and up.
We lubricate and test-run each pump before it leaves our shop as part of the quality control process. DO NOT RUN THE PUMP DRY. Do not tighten the electrical connection, as the brass screws with lock washers will break off and are also not covered under warranty.
We offer pumps for EM, Late, and FC models.
This is a wiring diagram sent in by one of our Corviar guys and it has protections in case of a stall that will shut down the pump. This wiring diagram is only a suggestion and not required. You are highly encouraged to use a fuse and some system to shut down the electric pump (during an accident/).
Click for detailed viewCredit: Al Lane, GA, Jun 2024
Brown EFI is for off-road use only