Race cams are designed to produce maximum torque and power output at higher engine RPM, usually above 6000 RPM. This means that we are unable to utilize the power at such high RPM as we usually drive the car at around 3000-4000 RPM most of the time. Furthermore, the power output at such high RPM requires a special close ratio gearbox to harness the power. With a standard gearbox the power delivery is very lumpy and there is not much torque and poor acceleration (pick up) at the lower speed range. Engines with race cams are high on fuel consumption and low on fuel economy. Another inherent problem with race cams is poor engine idling quality. The idling is usually rough and the idle speed has to be set higher at around 1200 RPM to prevent the engine from stalling. A standard engine can idle smoothly at between 800 to 900 RPM. - Sirazul (powerzone tuner)
Posted on: Wed, 30 Apr 2014 11:28:01 +0000