FW: [Diy_efi] Nitrous Injection system + closed loop control

[Hugh Keir]

I have now spent some time researching the available controllers and
have been unable to turn up any devices that will interface with a
Wideband Lambda.

There appears to be a number of controllers that will set the horsepower
based on a time lapse, but nothing that cares about the Air / Fuel
ratio. Given that running lean is one of the major concern of many of
the sites that I visited, I am surprised that nothing exists.

The Diy Telemetry thread is currently talking about microcontrollers
that might work well in this application.

It should be relatively straight forward to link up the outputs from the
following to the A to D inputs:-

Air flow meters
Throttle position
MAP
DIY_EFI wideband

It should be a simple matter to switch mode regulate the NOS and Fuel
coils to whatever combination of airflow throttle, etc you like and have
the input from the DIY_EFI wideband adjusting the timing of the NOS coil
in relation to the Fuel coil to hold a specific A/F ratio.

Anyone see why this should be difficult to do?

Is there a speed of operation of the PIC that would make this hard to
do?

I only have limited experience with 8051 microcontroller and some basic
and assembly language stuff, your comments would be gratefully accepted.

Hugh



I forgot to say, I have a twin DIY_EFI wideband set-up on the car. It
would be good if you could control the nitrous and fuel with a feedback
loop to hold a specific AFR when it is activated.

Hugh

I am about to fit a nitrous injection system to my engine and have been
looking at the Holley NOS Sportsman, individual port, Fogger System to
add 50 to 250 BHP.

Details at
http://www.nosnitrous.com/HiOctn/ProdLine/Products/NOS/foggers.html

Most of the technology seems to be in the jet that disperses the fuel /
NOS.

Are there other things / systems that should be considered?

Hugh Keir


_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://www.diy-efi.org/mailman/listinfo/diy_efi

_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://www.diy-efi.org/mailman/listinfo/diy_efi