Corvair Fuel Injection except turbos - Black Hawk Engineering

RH Fuel Injection Throttle Bodies for Corvair Engines except turbos

The RH throttle bodies are now available.

A complete system with a wide band oxygen sensor can be assembled for less than $2,500 plus shipping.

The price includes the throttle linkage down links but not the fuel injectors or throttle position sensor shown.

These throttle bodies use the original throttle linkage crossbar and air filter.

Throttle bodies with linkage installed on a spare engine. The adjustable down links with rodends are included.

With an air cleaner assembly installed.

The air cleaner was provided by Larry Yoder Corvair Parts. It will be cleaned and painted before installation on the test engine.

Front view

Left side linkage

Right side linkage

Ports are provided for both ported and manifold vacuum

Grooves are provided for Viton O-rings which are used instead of gaskets for better sealing

The Black Hawk Engineering RH EFI Throttle Body replaces the Rochester H and HV carburetors used on all non-turbocharged Corvair engines. The throttle bodies will bolt on to the cylinder heads with socket head cap screws. No head modifications are required. The throttle bodies have a 1.31" bore to fit the cylinder head carburetor bore. The EFI system is expected to be able to produce better fuel economy despite generating more power.

For a 110 engine (90 HP net), Engine Analyzer predicts 98 HP using 1.31" throttle bodies in place of 1.25" carburetors. I suggest 30 lbs/hr fuel injectors.

For a 95 engine (78 HP net), Engine Analyzer predicts 84 HP using 1.31" throttle bodies in place of 1.25" carburetors. I suggest 26 lbs/hr fuel injectors.

Most Bosch style fuel injectors will fit.

Read the answers to Frequently Asked Questions here.

The parts list with vendors and prices for a full system is here.

The installation procedure is here.

The initial installation will use a MegaSquirt control computer to control the fuel injectors. See www.msefi.com/ for details about the control computer. Other fully-programmable controllers like Simple Digital Systems, www.sdsefi.com/, could also be used.

While I can provide a set of tuning files as a starting point, you really have to consider tuning a do-it-yourself project. The good news is that it is easy. For MegaSquirt I, data from a wide band oxygen sensor is collected on a laptop computer while driving, evaluated with a software program and the tuning table entries are adjusted by the program. With MegaSquirt II and MicroSquirt, the adjustments can be made automatically within the MegaSquirt controller.

Two prototype throttle bodies mounted on a 140 cylinder head.

Two prototype throttle bodies with short tops designed to fit under the engine cover of the Deserter GS kit car.

A see-thru image created in SolidWorks

2 throttle bodies in SolidWorks

A single fuel rail will serve the 2 fuel injectors on 2 throttle bodies on each 140 head.

A more positive progressive throttle linkage for 4 throttle body engines will be developed later.


e-mail Address: sales at blackhawkengr.com
Last Update:  June 17, 2008 11:09 AM
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