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I keep seeing recommendations to keep the torque low at low RPM. I'm not sure if I'm just misunderstanding the recommendation or if there's more to it. Why would the engine care if I make 350 ft lbs at 3000 RPM vs 4000 RPM? Aren't the stresses the same? Or is it that the combustion expansion happens at the same speed, so if the piston doesn't move "out of the way" then it experiences a spikier load at low RPM than high RPM (even if the average load is the same)?
Ideally I'd like to run 350-375 ft lbs to the wheels at 3000, tapering down to 300 at 4000 RPM (due to competition rules), but I'm not sure if the motor will hold up (all I have are ARP rod bolts, catless downpipe, and 100 octane fuel). Is that achievable or do I really need aftermarket rods/pistons?
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