could you please explain the difference between Manifold and header. and "open loop" vs "closed loop"
Openloop = ecu adjusts stuff acording to it's maps in memory only, without compensating with the readings of is sensors ?
Manifold are die-cast vs headers are in piping ?
what are the other diff. ? hehe
thanx !
theminology...
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morgie
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vrg3
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"Loop" refers to the feedback loop between the injection control and the oxygen sensor. The oxygen sensor basically can tell the ECU either "you put too much fuel in" or "you didn't put enough fuel in." In closed loop, the ECU takes into account the information from the oxygen sensor. In open loop, it doesn't. In both open and closed loop, all sensors other than the oxygen sensor are used to look up values in the fuel and ignition maps. The difference is only whether the oxygen sensor is used.
As for manifolds and headers, I believe the difference is just construction. An exhaust manifold is the vessel carrying exhaust gas to the exhaust pipe or turbine inlet. OEM manifolds are typically just cast out of iron or something similar. A header is an exhaust manifold made out of pipe; one pipe meets each cylinder's exhaust valves and then the pipes join either all at once or in stages.
... I think.
As for manifolds and headers, I believe the difference is just construction. An exhaust manifold is the vessel carrying exhaust gas to the exhaust pipe or turbine inlet. OEM manifolds are typically just cast out of iron or something similar. A header is an exhaust manifold made out of pipe; one pipe meets each cylinder's exhaust valves and then the pipes join either all at once or in stages.
... I think.