Quote:
Originally Posted by jp.vegas
Good points regarding the drivetrain consolidation. No other company has been successful at building longevity into these tiny turbo 4 cyl mills. They run them out of boost for mileage cycles but when you really use them, they're always in boost because the torque curve is pitiful. Your mileage drops, they run stressed and I just don't trust that Toyota will be the ones to find the formula to make them succeed. Sure the power output numbers look great, but even for the V6 turbo/hybrid platforms, I don't see them lasting. Hell, even Ford had to back off and make a new Raptor with a V8 in it. They've had no end of issues with their 2.7 ecoboost motor in the F150, just more of the same.
Guess I'll keep holding on to my dinosaur of an NA 6.3 AMG and this 4Runner with the NA V6 until they pry them from my cold dead hands  |
It's really hard to know how these engines will last. They're just too new yet. Some of the parts look like they are built to last a long time. The architecture is very similar to diesel engines on the bottom end. Probably could just share the block with diesels. They actually might. Not sure. And the internal exhaust cooling could be the answer if it keeps egt low at the turbo. Id love to see what the numbers are. I've seen pictures of the Ecoboost turbos cherry red hot. No way they'll last with that kind of heat.
Many tests have shown that na engines are more efficient in real world use than turbo engines. But they don't do as well in the testing cycle. And Toyota refuses to size it's engines appropriately. So no doubt the little turbo mil they'll use will be overtasked and inefficient. IMO the ideal engine would be a turbo version of the GR. But a low pressure single turbo on the gr could be really great. Something like 5psi max Long lasting. Understressed. Not every turbo needs to be run at 20psi to work well.
In fairness the 8ar seems to be pretty reliable. And I don't hear much about the T24a so far. But it'll be a while until we know.
Linear Mode
