Mini (MPI conversion)
from the scrapyard, this Mini was one of the inspirations
behind the Canems Injection ECU and its ability to run a
five-port head on multi point injection. The car is fitted
with an MPI injection manifold, injectors and throttle body
- fitted as standard on all Minis from '96 on. The engine
is a mildly tuned 998cc.
can see in the image below, the three branch exhaust manifold
is fitted with two lambda sensors to ensure correct mixture
balance between inner and outer cylinders. This shot is
taken with the air filter removed for clarity.
manifold was a good test-bed for developing the Injection
ECU, because the fuel injectors are so close to the valves
in the cylinder head. This minimises any 'wet manifold'
effect and would normally cause serious problems with charge-robbing
to the inner cylinders of the engine.
device to the right hand side of the engine bay (behind
the throttle body) is a PWM idle valve. The ECU uses this
for closed-loop idle control, so we can just program the
ECU for an idle speed of 1000 RPM and the valve will be
adjusted continually to meet this requirement.
engine specification is as follows:
998 A+ bottom
12G295 cylinder head (standard ports/valves)
3-branch exhaust manifold
Wasted spark ignition
Complete injection system from '96-00 Cooper
in this form has been rolling-road tested at Bogg Brothers
near Malton in North Yorkshire, giving a power output of
60bhp. Low down torque is vastly improved over original
thousand miles of successful and reliable testing, the MPI
injection setup has made way for motorcycle throttle bodies.
Click here to find out more.