[Diy_efi] TPS or MAP Sensor ?

[bcroe at juno.com]

A TPS has useful information, but its about the poorest way 
to estimate fuel needs.  Thats because the vacuum will vary 
with rpm, with no TPS change.  A MAP is far better.  

Bruce Roe

On Fri, 25 Oct 2002 14:48:46 -0600 "Karl Doody" <karl_d70 at hotmail.com>
writes:

> I have a question for you with regards to running an engine on 
> a Throttle position sensor or a MAP Sensor for the engine load 
> feed into the ECU.   The current ECU i'm running is a GEMS 
> EM20 and at the moment i'm using a TPS sensor to measure 
> engine load and relay it's information back to the fuel and 
> ignition maps in the ECU, now the engine is for use in small 
> aircraft and because the propeller can be changed from one 
> pitch to another the engine load line moves within the ECU's 
> maps

> Karl

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