Re: [ST] "Offroad exhaust" tune?

["halfast3" <halfast3@xxxxxxxxxxx>]

Chris wrote:
> As far as I know most injection systems measure the airflow in the
intake and meter the fuel accordingly.  i.e. the filter is inside the
feedback loop.  This could mean that the ECU would compensate entirely
for blocked filter or no filter at all. <

Not entirely.  Even the '02 & later "closed loop" systems only control
fuel trim at and just above idle.  I believe there is no effect above
1500 rpm.  Additionally, Triumph uses a combination of sensor inputs
(throttle position, intake temp, barometric pressure, coolant temp,
crankshaft position and the like) to determine injection quantity and
ignition advance.

> Two types of flow-rate measurement are hot-wire and disc-in-a-cone.
<

I'm not aware of mass air sensors in these applications.
--
Rick in Oregon
'01 Sprint ST

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