kmmalek

Foam to measure wheel envelope under load? Perhaps trying different tire/wheel sizes? (In the past, they used white styrofoam; perhaps this is new, more environmentally friendly material?)

KOTYKB

digitalrurouni

But it looks so ugly!

Diablo Dude

Wow, I'd be hard pressed to think that sounded NA.
Very hard pressed,

blipit

Sounds NA to me, with GPF muffled sound. Compare it to 992 vert right before it, the 992 sounds silent. What it definitely isn’t is the 4.0L from the GT3.

venom51

We all agree there is a huge variance in the sounds of the GT4's we see in the videos. The GPF appears to drastically alter the sound of the car if that is what we are hearing. The first one you see in that vid has what I would call a deeper version of the original GT4's sound. Could be GPF. Could be it's a larger bore/longer stroke variant of the previous motor. Who knows. The one at 1:36 and 2:18 sounds more like the original GT4. The one at 3:29 sounds entirely different from the others. It also could all come down to the new PWW controlled exhaust valves as well. They are apparently no longer just opened or closed as on the previous gen car.

One observation I would make is why does the new GT3 in black sound exactly like the previous gen GT3 leaving the pits behind it? Would seem if it had the filters on it the that note would change there as well.

blipit

Porsche was very smart with the implementation of the GPF on the Speester. The particulate filters allowed them to eliminate the large side mufflers, since the GPF kept them within the sound regulations. Not only does it still sound good, the Speester exhaust is 10lbs lighter than the RS. I would guess the 992 GT3 has a similar setup, hence it still sounds great.
I'd expect the GPF to have a greater impact on the GT4 exhaust, just by the way it is routed.

venom51

You just answered my previous question.

GT04VVV

I swear they keep running it around the 'ring purely for their personal entertainment then reading the comments in forums... there is no 718 GT4, it's just an elaborate hoax, my dealer told me so

06C2s

Awful lot of “whooshing” going on

ajw45

Seems like the end of switchable PSE. PSE used to provide a shortcut through the initial/side mufflers but with new sound regulations and gpfs the loud button might be done.

SINY993er

Any idea when order books will open for these new GT4 models - GT4, Spyder and Touring?

bk_911

If we knew we wouldn't be sitting around complaining on this thread about the engine

KOTYKB

Later this year... obviously nobody knows, so why ask?

Ksdaoski

Third Thursday of July