[paulannesley]

Sometimes the best answer really is a faster Corolla!

https://www.toyota.com/grcorolla/

(These machines have amazing engineering and performance, and their entire existence is a hack to work around rules making it unviable to bring the intended GR Yaris to the US market.. Maybe just enough eng/perf/hack/market relevance to HN folk to warrant my lighthearted reply. Also, the company president is still on the tools.

[2OEH8eoCRo0]

There's no replacement for displacement.

[Sohcahtoa82]

Apparently there is, because that car only has a 1.6L 3-cylinder engine and yet produces a whopping 300 horsepower.

[2OEH8eoCRo0]

When? In the RPM sweet spot after waiting an eternity for the turbos to spool? There's always a catch.

[zackmorris]

I didn't expect to be writing this comment on this article hah, but apparently there is such a thing called a surge tank for storing boost pressure to mostly eliminate turbo lag:

https://www.highpowermedia.com/Archive/the-surge-tank

https://forums.tdiclub.com/index.php?threads/air-tank-or-com...

It's such an obvious idea that I'm kind of shocked it took them until 2003 to do it. Surely someone thought of this in like the 60s.

I would probably do it differently with a separate supercharger to intermittently maintain another 1-2+ bar of boost to make the tank less than half as large, but that would add complexity, and what do I know.

[0xbadcafebee]

Afaik the general solutions to turbo lag are 1) a smaller turbo, 2) two turbos in stages, one spools earlier, the other later, 3) a transmission/differential/tune tailored to be in boost near-constantly during acceleration (something like a 10-speed cvt designed to keep you in high revs when accelerating in sport mode; not only keeps you in boost but is the ideal power band for these non-diesel boosted sports cars)

[Sohcahtoa82]

> 10-speed cvt

CVTs shouldn't even have a concept of "speeds". I absolutely hate how manufacturers will build cars with CVTs and then make them only go into discrete gear ratios. It completely destroys the entire reason for having a CVT.

I understand that they do it because people don't like how CVTs sound/feel, but maybe they should all have 3 modes:

1. Eco - optimizes gear ratio for maximum effeciency

2. Performance - optimizes for maximum power

3. Sport - pretends to be a normal transmission for a better "feel".