Monday, June 28, 2010

Kugelfischer Fuel Injection Pumps (Street & Race)

Kugelfischer (Bosch) Mechanical Fuel Injection Pumps were used in a wide variety of motors.  At the top is a Formula Super Vee motor utilizing Schrick multiple butterfly fuel injection.  BMW fans are pretty familiar with "Schrick" and the parts they make for BMW's (valves, valve springs, cams and in the old days, Headers, Slide throttle manifolds etc.,).  That Super Vee motor really caught my attention. The next image after that is a pump for a Porsche 935 Turbo.  After that is a pump for a BMW M12/7 and this pump I believe has a magnesium body casing based on the color of the metal.  I have seen a few images of BMW M12/7 motors that have similar looking pumps.  The racing pumps do not have cold start regulators on them and also have  a sort of spring loaded toggle - that toggle has to be depressed when the engine is engaged in order to fuel flowing to the motor.  The BMW race pumps have 7.5mm pistons as opposed to 6.5mm pistons for the street pumps in addition to having completely different cams intenally.  The last image is of a standard style pump that you would see in a BMW 2002tii or ALPINA A4 (the A4 pump has a different cam then the standard tii pump).  Aside from the BMW applications (M10 street, ALPINA, Schnitzer, M12/7), I have seen these pumps used with Ford Cosworth BD series engines as well. 

1 comment:

  1. Thank you for the information on injection pumps. I am trying to learn all I can about cars and engines, and this was perfect for me. You explained things very well.