Dual TBI


Performance, Economy, and Durability:

The 2-throttle body Injection system can be used on ALL Corvairs except the turbo version.   The Carburetors are replaced with Brown EFI Throttle body injection units (TBIU).  These TBIUs are Corvair Carbs that have been cleaned, new throttle shafts installed, and the venturei is removed for higher airflow.  These kits use your existing Corvair throttle linkage and distributor that is easily modified for a trouble-free, adjustable computer-controlled ignition system.  Each Corvair engine type will have its tune and we plan to constantly update the tune with the community of EFI tuners.  User modification of engine tune can be accomplished with a laptop for those wanting different performance parameters than those originally designed.   We use one (1) high-pressure injector per TBIU which highly atomizes the fuel spray, even at low engine speeds.  The TBIUs are the same height as factory carbs to allow for air cleaner clearance and maintain optimum injector angle.  The FC/Early models will need a modification to allow for the air cleaner to hold down springs if desired.  The electronic idle control system (ICS) advances the idle when the engine is cold, or as needed on engines equipped with an Automatic transmission.  We program the ECMs for the middle-of-the-road engine setups, so some engine combinations will require user adjustment with a laptop.  The ECM Supports the use of single and dual Wideband O2 sensors (purchased separately) for advanced tuning and precise fuel control.

Ignition:  The standard kit has the Crank Wheel trigger system, GM LSX ignition module, and your standard coil.  This configuration is simple and supplies ample spark, but for those who want a little more spark, we recommend the “Flame Thrower 40011 40k” coil.  These upgraded coils provide more than enough spark for Corvair engines except for extreme setups.   Using this type of setup, you can create custom ignition curves and factor in things like temp. A/C cars will need the 6025 EFI Distributor to replace the crank wheel system which is available for an additional cost.

Fuel System:  The engine bay fuel lines are included with the kit and provided from the rear of the engine (firewall).  The Dual TBI kit includes a Fuel pressure regulator,  fuel lines with fittings to both injectors, a fuel gauge test port adapter, and a fuel pulse dampener installed between the engine and body fuel line.   The fuel line test port adapter plug can be removed and a permanent fuel line pressure gauge can be installed.  The fuel pulse damper along with the fuel gauge will help eliminate pulse pulses inside the lines that can cause uneven fueling.

O2 Sensor:  You will need to purchase the WBO2 controller and sensor of your choice.  The Wiring harness is prewired for dual WBO2 sensors (Dual TBI only).



The kit includes all items from the fuel pressure regulator to the engine. The fuel pump is NOT included in the kit but is available at an additional cost.

Kit Contents
1 ea      TBI, Drivers Side with TPS
1 ea      TBI, Passenger Side with Idle Control
1 ea      Fuel Line Driver Side ¼”
1 ea      Fuel Line “T” to Tunnel Line 5/16”
1 ea      Fuel Line Main 5/16”
1 ea      Fuel Line Test Port with plug”
1 ea      Fuel Line “Passenger Side ¼”
1 ea      Fuel Pressure Regulator/Filter, 58 lbs with 5/16″ hose barb
1 ea      Fuel Pressure Regulator to Fuel Line adapter (3/8″ x 5/16″)
1 ea      Fuel Pressure Regulator to Fuel Line adapter (5/16″ x 5/16″)
1 ea      Fuel in-Line Dampener 5/16” (Between Body and Engine Bay)
1 ea      Fuel Return Line Filler Neck Adapter (5/16”) w/Clamps
1 ea      Control Panel, Mounted ECU and MAP
1 ea      2 TBI Wiring Harness with Relays
1 ea      Head/Engine Temp Sensor (3/8-16 thread)
1 ea      Fuel pump block-off with O-Ring
1 ea      O2 Bung, Weld
1 ea      GM Ignition Module w/Heatsink
1 ea      36-1 Trigger Wheel w/bolts and spacers
1 ea      Crank Sensor Bracket
1 ea      Crank Sensor
1 ea      USB to 2.5mm ECM to Laptop Cable
1 ea      Diode (Alternator Feedback)
2 ea    **Carburetor base core required
1 ea    **Distributor core required

Cores:   **Send your cores (Early models are preferred) when you order to allow time for the modifications to these items and avoid delays.  Your cores must be in reasonably good shape and must have a fairly straight Bell Crank, a throttle plate, and a throttle shaft that is not binding.  Unusable bases have to be thrown away, waste your shipping, and another set of cores will be needed.  A core charge will be charged for each unusable core.
Did you know that Brown EFI is intended for off-road use only?