Quote:
Originally Posted by SUB-FT86
I feel very much like this. I always feel when I high rev a 4banger that the car is in so much pain that something will break and I would be SOL. I hope the FR-S doesn't feel this way but I wonder if flat 4 engines feel buttery smooth like a V8 or I6?
|
Chicken $*** hahaha.
What engines really really hate is lugging. This is where the engine is very low on RPM and fuel delivery is high under load. The engine is trying to increase engine rpm to an acceptable level so there is actually power and or avoid stalling.
You find that after ignition the forces on the piston are extremely high because it's [the piston] not moving at the speed the engine is designed to run at. The 2ZZ makes a particular knocking noise when it's lugged, some but not all engines do.
In addition it's harder on engine and drivetrain components on (lets say) a SUV with a trailer heading up a steeply (20%) graded hill highway on a high cruising gear. If the engine does manage (by some miracle) to keep a stable low rpm then you may face cooling issues with a long enough hill because the water-pump isn't going to be rotating at an acceptable rate to provide the quantity of coolant that will needed to be circulated (same with the automatic transmission fluid). So in this circumstance it's actually advisable to drop down a gear or two and make some noise because it will cause less wear on the drivetrain. Most people are too scared of destroying their engines to do this, instead the auto tranny will overheat and possibly pop... their loss.
In addition you have something designed like the 2ZZ that makes it's maximum 131 lb-ft torque at 6700rpm (127@4400 is stated), it's "not happy" below 4000rpm (especially at WOT) under load. It's funny because it's an NA engine which means it responds instantly but is lazy in the low rpm range.