From a point at sea, to the circles of your mind, this is Sean Nugent:
Ok - so how does it do this. What parameters are changed to actually
cause the increased HP & torque...
Specifically for a turbo car btw
You're talking about re-mapping the engine management control - either
the ignition, or fueling, or both. Since the developement of software
control, ignition advance no longer needs to be linear, governed by
simple centrifugal weights and modified by manifold depression.
Electronically controled fueling is a lightyear away from that which
was dependent solely upon the flow or depression in the inlet tract.
Graphical representations of the 'mapping' that controls these aspects
under the infinite veriety of engine and load conditions, are
three-dimensional. You can program in a veriety of different
objectives that will vary the torque and power output of the engine,
depending upon what you want to achieve.
This is engine tuning as computer science, but as with any form of
tuning, bigger numbers mean greater stress on the engine.
--
Stewart Hargrave
Faster than public transport
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