05RollaXRS

05RollaXRS

LOL. What a gem of a post. Where to begin. Die sooner? Many high revving engines last hundreds of thousands of miles despite having being revved to 8000+ rpm (ask me how I know?). High rpm power is something that comes from racing engineering where lightweight engines mean smaller displacement that can produce more than 100 HP/Liter in order to go fast. And yes, mostly they do love to rev because they are extremely smooth and sonorous like nothing else. It requires extreme precision engineering to reduce friction at those high rpms, internal inertia and centrifugal forces and cams that are designed to precisely provided the airflow the engine needs at those rpms to produce torque.

You show total lack of knowledge when you say high rpms are for engineers who cannot design cylinder heads because high rpms is the only way to make the engine produce 120 - 125 HP/Liter of displacement. Simply put, a 4.0 Liter engine will never make 500 HP at 6000 rpm N/A no matter how you build the cylinder head. Period. Before you talk about torque, remember torque is a function of HP. HP is extrapolated from torque, The higher the torque at high rpm, the more HP it will generate.Then the gears spinning fast at those rpms multiply the torque over many times.

To give example of LFA, looking at the dyno curve even at over 9000 rpm LFA produces over 90% of its peak torque so it is the quickest when it is shifted close to the 9500 rpm rev limit. With short axle ratio (numerically higher), it can multiply torque the most at those engine speeds to get the maximum power for acceleration. Having a flat torque curve that stretches all the way to redline is what the engineers aim for in a high revving engine. It is not like the redline is chosen for show. Typically, engineers put a high redline because the car is designed to make a flat torque curve at those rpm before it starts nose diving.

05RollaXRS

Got it. When you have no factual argument and do not have a leg to stand on then mocking is the best option. It is one thing to have a personal preference for large displacement/low revving engines (or turbo engines), quite another to trash high-revving concept. I am sure all of those billions spent in R&D for high-revving engines for production cars and their racing teams by leading sports car manufacturers like Porsche should have engineers come and learn from you. .