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Performance camshaft and emissions.
How would installing a mild performance camshaft in an otherwise stock EFI engine (not OBD II) affect drivability and emissions.
My wife's car is an '87 Mustang with a 2.3 4cyl, auto trans, and 213,000 km. I am rebuilding the cylinder head to correct an oil AND coolant burning problem, but otherwise the car is like new.
Since I cannot ever leave things alone, I would like to install a Crane mild performance camshaft, (intake 272 deg advertised duration, exhaust 280 deg.) So, how would this affect the stock EFI system, especially in terms of emissions?
Two problems come it mind......the longer duration intake lift may reduce manifold vacuum, causing the MAP sensor to send a misleading signal to the ECM.
Also, perhaps the extra flow at wide open throttle would go beyond the fuel deliviery capabilities of the EFI system, causing a lean condition
Finally, yes I know this is a poor platform for a project car, but I hate the idea of installing a new stock camshaft when a bit of power can be gained for no extra effort by installing a performance cam.
Thank you any input you might have,
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