Quote:
Originally Posted by
Mallard
HP = [Torque*RPM]/5252
RPM is a direct influence on power. The higher you can spin your engine, the greater potential for power, provided you can flow enough air for that given RPM. That's how sport bikes, Formula 1 cars, etc. can make so much power with a small displacement. They rev like crazy.
The problem is that the 2.4 is a long stroke motor. The Piston speeds at 6500RPM are approching longevity/safety limits. I have it on very good authority that 7k is the most you would want to turn the 2.4 in it's current configuration. Also, there are flow issues at higher RPMs with this engine. Look at all the dyno sheets and see how quickly torque falls off after 5500 rpm, it's a flow thing!