12 b


 I woke up with an idea. No mass air flow sensor. No maximite
 required. Use a potentiometer that is geared to the throttle with a
 small cog belts. Put 5 volts on top of the pot.

 Or you can use a leaner pot with a slide throttle.

 5 volts wide open zero volts closed.

 http://www.sdp-si.com/products/miniature-products/miniature-belts-and-pulleys-inch.php

  Then use my one chip $1 555  EFI.

 Super low cost super simple TLC 555 based electronic fuel injection.


 <http://www.rotaryeng.net/simple-cheap-555.html

 You can use a low cost Harbor Freight Voltmeter to monitor the pot
 voltage..

 There is no system EFI or carb that is lower cost.

 Paul Lamar


 Paul,

 That is a throttle position sensor TPS

 Why not put a pot in the cockpit at the rotation pivot of the
 throttle lever?

 Kinder environment



 Joe Berki

 Paul,

 Jst  a thought about eliminating the MAF.

 Do we lose altitude compensation?

 Joe Berki

 Yes. But when you take off at a high altitude airport with a carb
 equipped engine you must adjust the mixture anyway.

 The mixture pot can increase or decrease the voltage applied to the
 pot connected to the throttle and then the  555 at any throttle
 setting.

 This is a quick, dirty and low cost  EFI way of getting your engine
 running. You fine tune it with the mixture control just like you do
 any carb equipped aircraft engine.

 Paul Lamar


Honda uses a map sensor (MAP) and throttle position sensor (TPS) on their engines.
That would really simplify your system. The idle speed control (ISC) on the bottom could be taken off if not needed.
Barry Bordes


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