The transmission only couples the engine to the wheels. Yes this can place the engine in its power band. The engine still has to develop power."Power" is relative, so it really isn't useful arguing about that. I will say, my 2DR with the 2.3 and MT has never left me wanting.
I'm not an expert but doesn't the transmission move the vehicle, not the engine. So long as the two are paired appropriately, shouldn't the weight of the vehicle be a non-factor? I mean, once the vehicle is rolling, how much more effort does it require to keep it rolling?
Also, I keep my eye on the Tach, the engine doesn't appear to be working hard and has plenty of gearing (in the MT and Auto) to optimize the power and torque of the engine.
I won't speak to long-term reliability, but the simplicity and reliability was part of my hope in getting the 2.3 paired with the MT in the 2DR. Only time will tell if it was a wise or meaningful difference, but I am very happy with the combo now.
If @mpeugeot is correct, and it seems he is on to something, then the overall engine might not have an issue, but an isolated part within the engine. The speed at which it seems dealerships are opting to replace engines leads me to believe this is a known issue. I wonder if Ford is working on a retro fit that would mitigate the cost and time to replace suspect and failed engines currently in use.
Once rolling, one still has to overcome air friction. At highway speed that is not insignificant, but you are true weight of the vehicle isn't a major factor although it does play some role in the rolling friction.
The weight playing a small role goes out the windows if there are hills or if one is in the mountains. That will make a engine work hard.
Tachometer only shows engine RPM, not how hard the engine is working. These are not the same. The biggest sin in my opinion is lugging an engine. That is giving a car more gas at low RPM to accelerate of hold speed when a downshift will accelerate better and can hold speed better with less throttle input. Higher RPM has its own wear, but trying to push more fuel thru the cylinders when RPM is low occurs at a point where the engine is at a mechanical disadvantage and causes higher stress and worse fuel economy. In this way my experience differs from popular belief that lower RPM always yields better fuel efficiency.
I too got the I4 with the MT. I would have preferred larger engine, but prefer the manual over automatic. Automatics are always reactive and downshift only after one is into that lugging zone. I much prefer to anticipate. I worry about the stress on the engine and recognize as a turbo engine, it certainly has plenty of power, but that means even more stresses. I just hope....that with less moving parts it proves reliable. Those plastic idler pulley's make me cringe however.
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