2nd Gen EFI Systems




Got a Gen1 system and want to be able to adjust AFR or have a fully adjustable system?  We are planing on an ECM and wiring harness that connect to your existing Gen1 system.  Stay tuned


The EFI goals are them same as the Gen1 EFI:

  • Dependability (use of GM proven/easily obtainable parts)
  • Low Cost EFI (EFI is expensive, but we make it affordable)
  • Performance (Easy Starts, smooth acceleration, care-free driving…just like today’s cars)

2nd Generation EFI design is nearing completion and production will start August 2018.  After years of producing the 1st generation GM TBI system, most of the parts have almost been used up and we are nearing the end.  We will still support 1st Gen TBI as we will continue to sell them until throttle bodies are no longer available.  We are presently drive testing the Gen2 Injection with the modified Corvair distributor and another with DIS to ensure it meets performance and durability standards that we require and deserve.  The Gen2 system introduced at Maggie Valley, NC Corvair Show October 2018 and should have about 10,000 miles under its belt.  This setup will use the standard Corvair Throttle linkage, even for the FC.

ALL conversions are highly recommended to upgrade your charging system to internal regulated Alternator (All years Cars and FC).  The external regulator location will be used for the ECM/relay panel on the late model cars (1965-1969).  It is one of the best and inexpensive upgrades you can make on your Corvair and will improve reliability.

This generation of EFI  will be more earth friendly than the 1st Generation at idle and cruise……. what does that mean?  For the “Tree Huggers” the Corvair will be more environmentally friendly (or at least a lot more than GM ever designed).  With a smaller TBI bore than the Gen1 system, we are also able to produce less pollutants at idle while protecting the engine and producing good performance and reliability.  

Using a easily programmable ECM, users may adjust their system for more power (richer) or even take it farther (leaner) for better fuel mileage with the help of a wide band O2 sensor (only a NB O2 sensor is included in kit).  A laptop is highly recommended for install, setup and diagnostics to include remote support.

You end up where you started:  The second generation EFI looks very similar to some of the prototype versions that we ran before the GM TBI-700 was selected for Gen1.  With the introduction of smaller components, better aftermarket computers and available after-marktet parts have made this possible.

Units are produced using low cost production measures along with parts that are currently in production.  A  fully electronic, ECM controlled Corvair converted distributor will be an optional ignition of the Gen2, but DIS will be the standard option. We may offer upgraded Billet throttle bodies for those wanting to spend extra in the future, but our initial throttle bodies will be designed for function and looks vs cost.  We can build high end machined billet aluminum Throttle bodies, but this is very expensive, so initially that will not be an option nor our mission. 

Stock units will come with an ECM that can be programmed for your particular engine.  After receiving your kit, you will select your engine from the website, download to your laptop and upload to the ECM.  Your ECM tuning code will have your name/information recorded inside to program as this tune should not be shared/posted on-line.  This ECM can also be modified if needed due to special cams or other changes to the running of an engine.  Users will be able, with a laptop, change their own tunes for user desired engine performance.

Differences:  Speed sensor has been deleted as this ECM does not require the input.  The temp control of this engine needs to know if the engine is Cold, Normal or Hot and does not use exact temp measurement for timing control.  Idle control is by Fast Idle valve and used during warm us and when under load. The ECM will be the only major part that cant be replaced from FLAPS, but are readily available and can be shipped next day .

Do I need to upgrade from Gen1 to Gen2:  No, but I can see if you have a 140 there may be some advantage to having 4 TBIs sending fuel in air equally into the fuel log.  The Gen1 TBIs have a larger bore and may produce more power, but don’t have the Corvair look as the Gen2  The smaller bore may improve idle and “tip in”.  Other than having a more Corvair looking air cleaner system and linkage, the Gen1 models are proven to last “almost forever” and require little to no maintenance.  For a 3.0/3.1L engine, I could not see a better setup than the Gen1 TBI.

Modified Sender w/HP pump

Fuel System:  The fuel system for the Gen2 will use a higher pressure regulator (59 psi) to produce better atomization at the injectors.  There are different ways to fuel the injectors and are based on level of difficulty and price.  The 2 Pump Configuration uses an external Low pressure pump (outside the tank) to “siphon and pump” fuel to the 2nd, High pressure pump located behind the engine compartment.  This will allow external pumps to be used that are quite and easy to maintain.  Internal pumps are always the best for durability and noise, but do present a challenge in case of failure or needed repair to other items.   Fuel pumps WILL NOT be included in any kits due to warranty and repair reasons.   A fuel pressure regulator and filter will be provided to protect the engines injectors and maintain the proper fuel pressure.  The fuel pressure regulator is also a filter and are  readily available through aftermarket means. We will continue to use “mostly GM” tried and true parts that are generally available at most auto parts stores and reasonable prices.

Injectors:  Injectors will be standard low profile injectors, but we have selected a multi-hole type of injector to better atomize the fuel.  Standard 1 hole injectors may be used, but not recommended.

Ignition:  Initially all kits will come with GM DIS.  this will require either drilling your Harmonic Balancer or adding the trigger wheel to the HB.  Optional kits will be offered with a factory Corvair distributor that has been modified to use the Vortec ignition module and E- coil that are readily available at all auto parts stores (These are included in the kit).  This distributor arrangement will have the factory look and will not interfere with  air conditioning compressors and other factory devices.  The semi-electronic “ready to run” distributor is also be compatible with Gen2 Kits.  This type of  distributor is a self contained electronic “ready to run” billet distributor, but timing will not be controlled by the ECM as with DIS.  These distributors are manufactured by Top Speed Performance (TSP) and sold by TSP, Seth Emerson, Amazon and others.  This type of distributor can NOT be used for the Turbocharged kit due to loss of timing retard.  These “Ready to Run” distributors can be modified (removing the chip board from inside) and locking the drive to prevent advance.  If you want yours modified, please let us know.  GM Distributor and TSP distributiors will be available by special order as it requires different wiring harness/wires, parts and programming.  

Idle Control:  These kits do not have integral idle control built into the TBI as the Gen1 kits, but an add-on item Fast idle control valve and is being designed to be cost efficient.  Most users can get by without it by adjusting idle up, but “idle control” also provides high idle to aid in the start/warm up process.

Air Cleaners:  The throttle bodies are close to the same design as the factory carbs, so your linkage and air cleaners will fit the way GM intended when designed.  140 kits will need to use a “lock out” on the linkage to allow all 4 throttle bodies to open evenly.

Warm up:  One of the concerns about this design is that the vehicle can be driven immediately after starting, which sounds good on the outside, but the Corvair engine was never designed to drive until the engine has had sufficient time to warm and “fill” engine clearances.   Engine tins and flaps should be in place to ensure engine get to temperature a quickly as possible with the minimum amount of load to promote long engine life. 

Carb Bases/Cores:   We will need your Carb bases shipped to us with your order.  This is so you get back what you send us.  We can provide Carb bases at $35.00 each which will include a degreasing and blasting with walnuts, but these are not intended for show quality   Please don’t send us junk as I have to throw it away, wastes your shipping to me and you will have to send another Carb base.

2 Throttle body:

4 Throttle Body: