Tuesday, Mar 07, 2006 at 16:02
Hi Steve
Don't know at what level you have got involved and it can
be a big subject and an advantage if your into electronics.
If you haven't already, then reading the jacar book
of electronics for cars is great value, even if you never
build anything.
Haven't played with a new Navara, but got two mates who
got last of 3lt ones. These certainly lack torque down
low, ones now gone ditronic and happy, after a bit of a play
in the sand in which I showed no mercy.
The area where you can gain everywhere is using these
things to blueprint the open loop combustion cycle just like you
can with the more familar mechanical engine blueprinting.
Gains here are typically small 5-10% but real.
Many closed loop ECU control systems can to a degree
effectivily tune back out changes. But most vehicles
have both open and closed loop modes. Open usually
being fixed settings used when throttle is wide.
Because of this there are usually no additional
sensors needed and you rely on the skill of the
ECU programmer to get the correct fixed settings,
sounds like you might be better at commenting in this
field.
Seperately if your into electronics a bit it is possible
to defeat the factory settings to a degree in closed loop
mode, with add on control systems by changing the fundamental
reference value (i.e. effectively setting the OXY sensor
to other than 14.7).
But of course this is at the cost of another factor as per your
original post
Robin Miller
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