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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Thought of one more way to cheaply add some more fuel up top.

By setting the normal CO adjustment to its max point or full rich, we allow the metering pin to advance further at the same point the metering plate stalls. Such an adjustment would thus give us more fuel up top.

This of course would make the motor run way to fat. Thus, by clipping the metering plate, we can get more air to flow around the MP at lower rpms to get the AFR/CO back in balance.


Quote:
Originally Posted by 911st View Post
How may ways can we deliver more fuel on a CIS system, let us count the ways:

Readjust the fuel head (IA or shim the head system pressure).

Increase flow of stock fuel head by adding windage to the top of the metering plate.

Increase flow of stock head by reprofiling and extending the cone that the metering plate rides in.

Increase flow of stock head by relocating the metering arm pivot (Steve W. Renn Sport mod).

Lower on boost control pressure using the Andial fueler or Digital WUR.

Lower on boost control pressure by using a 3.6 WUR or readjusting the stock WUR.



Us a fuel head from a V8 and plumb on or two of the extra injectors in as an additional injector (s).

Add an additional EFI fuel injector. (Not recommended unless driven at 100% duty cycle or uneven fuel distribution per cylinder.
Old 05-02-2009, 07:50 AM
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