MaxLTV

This is the key point.

Manufacturers are going with water injection because enthusiasts are demanding NA-like throttle response and precision, and it's still not something easily achieved in high boost engines. Bigger intercoolers increase mass, screw up aero, and increase turbo lag. Any volume of air between turbo and intake valves adds lag, similarly to placing throttle bodies further from the engine in NA application would do, but much more so. Water injection with current super-precise and responsive computers can minimize lag and even-out some quirkiness of turbo throttle response that happens at higher boost. It's a good thing when done well, IMHO - less weight, better throttle response, potentially better aero, more efficient burn.

neanicu

I sure hope some of that steam gets to the back of the valves,even though I don't see how. DFI engines look disgusting even with low miles. That is why the majority of manufacturers are switching to dual fuel injection : port and direct.

signes

If they're using water injection, why not use methanol - wouldn't you get better cooling? Same question for the M4 GTS.

FRP||

Water has a higher heat capacity and requires more energy input to phase change.

GrantG

It's also much safer to handle, buy, and install water than methanol.

RennOracle

GT2's should be on the Turbo area, these discussions are almost common knowledge over there, plenty of people could chime in with 1st person experience.

But E85 is a matter of an ecu tune, imagine it as a high octane fuel.

As for methanol, because there would be a need for an exact mix of methanol in the water and this is very hard to get and people would have to do their own mixture without any certified quality control.

Plus there would be some retard that would put 100% methanol and destroy the car, or buy window washer (a common way to buy water-methanol mixture) that has more methanol than stated in the package or even have a leakage into the cabin and they would put themselves ready for a lawsuit, as methanol can corrode most hoses and it could very easily happen to the common person.

It would be a hassle rather than a pro, but for aftermarket, it wouldn't be that much of a hassle.

ipse dixit

Obviously, the answer is diesel.

GT2 RS Diesel, anyone?

RennOracle

I'm almost sure that the nozzle is usually installed in the Y pipe, no directly into the block, so it will clean the valves, this if Porsche uses the same schematics of aquamist (that is proven to work very well).

Kobalt

Just spit beer over myself.

signes

Good idea, with diesel engines being highly... ahem...tunable...

Thanks to those for the explanations on alcohol v. water. I get the user error risk, just thought methanol would lower temps faster than water spray.

BrntRubber

From Cnet:
"So how much is all this going to cost? The starting price of the 2018 911 Turbo S Exclusive Series is $257,500, a premium of $66,800 over the standard, $190,700 Turbo S. If you still have some money left over, you can drop another $6,324 on a five-piece Porsche luggage set designed to match the car, which will only be available for owners of the car. With only 500 units available, the 911 Turbo S Exclusive Series won't be on sale for long."

RennOracle

Did anyone notice the 400 Km/h dial in the video?

Redback911

Good spot. Its a bit clearer here..

RennOracle

I'm not affirming anything, but both the 996 and 997 gt2 were able to 'meet' the limit of the counter, will this one be as able? 400 would be a hell of a feat.

hf1

Those speed dials were useless before -- now beyond useless with a 400km/h max.