Question about wide band lambda and progammable ECU
Discussion
At some point this year I will be going down the route of either megasquirt or emerald. It will be a diy install as its rather difficult where I live to get the car to a centre for the job plus I like doing jobs on the car myself.
What will fitting a wide band lambda controller actually achieve if I fit one at the same time as the new ecu.
What will fitting a wide band lambda controller actually achieve if I fit one at the same time as the new ecu.
If your going MS then a wide band lambda is a requirement if you are going to do your own mapping.
The lambdas fitted on the standard 14CUX ECU is for trimming the fueling on the fly and will help
with emissions too but these are narrow band and show week or lean readings but not by how much.
With a MS ECU you will use the readings from the wide-band lambda sensor to tune the fuel tables
to get the best performance from your engine as well as ensuring you don't run too lean and damage the
engine.
The basic idea is to load a base map into the ECU to get the car running which you then tweek to get mixture and idle sorted. You then run a logging program which logs various parameters including your fuel tables, mixture, throttle position and so on and go for a slow drive.
This data is then saved and then loaded into a tuning software program which adjusts various parameters to improve engine performance. This is then saved and loaded to the ECU, the process is then repeated at increasing speeds and throttle openings until your happy with how the car drives.
There is then ignition timing to adjust and other bits and pieces but you get the basic idea.
But to achieve all this you will need a wide band sensor unless your paying for rolling road time.
Once all your tuning is done the sensor can be setup to trim fueling on the fly like the 14CUX if
you want too.
Hope this helps.
Paul.
The lambdas fitted on the standard 14CUX ECU is for trimming the fueling on the fly and will help
with emissions too but these are narrow band and show week or lean readings but not by how much.
With a MS ECU you will use the readings from the wide-band lambda sensor to tune the fuel tables
to get the best performance from your engine as well as ensuring you don't run too lean and damage the
engine.
The basic idea is to load a base map into the ECU to get the car running which you then tweek to get mixture and idle sorted. You then run a logging program which logs various parameters including your fuel tables, mixture, throttle position and so on and go for a slow drive.
This data is then saved and then loaded into a tuning software program which adjusts various parameters to improve engine performance. This is then saved and loaded to the ECU, the process is then repeated at increasing speeds and throttle openings until your happy with how the car drives.
There is then ignition timing to adjust and other bits and pieces but you get the basic idea.
But to achieve all this you will need a wide band sensor unless your paying for rolling road time.
Once all your tuning is done the sensor can be setup to trim fueling on the fly like the 14CUX if
you want too.
Hope this helps.
Paul.
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