This is what they say:
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Contour SVTDyno results from Superchips show a peak gain of 15 wheel HP while consistently averaging 10+ HP in the mid to top end! Torque is improved as well, up over stock throughout the entire RPM band, with peak gains at 4800RPMs.
First, power is developed by leaning the fuel mixture at Wide Open Throttle (WOT) which is excessively rich from the factory. Second, while the Contour is an SVT vehicle, it still suffers from tip-in retard, which causes the ignition timing to pull back (retard) and thus retard performance as the driver hits the throttle more aggressively. Basically, the greater the change in throttle, the greater the retard. Superchips really corrects this problem and adds back that ignition timing to really wake up the vehicle.
Third, the SVT has something called an IMRC, which is short for Intake Manifold Runner Control, that meters the amount of air flow and the velocity it travels in the intake manifold. Concept: at low engine RPMs the IMRC is fully closed, keeping airflow velocity high, while at low volume. As the RPMs increase, the IMRC suddently opens to allow for more air, but the velocity decreases, thus killing low/mid range torque. Solution: Superchips IMRC control which retunes the "when and how" the IMRC opens. In most cases the IMRC slams open at a certain RPM, we tune so that the IMRC starts opening at an earlier RPM & opens more slowly. Result: optimum velocity is maintained while allowing for additional low/mid range air flow. The torque curve is pure proof!
The engine rev limiter is raised about 250-300RPMs to allow for later shifting, and in most cases we disable the top speed limiter, just in case you ever hit it!
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Seems to make sense but, like you said the stock one doesn't look like a duratec curve?
I wish!
