GrantG

Porsche always equips its cars with PCCB’s for setting Ring times. Nürburgring is not hard on brakes, so it’s not a big deal even for owners (and never a problem for the factory). Times are slightly better due to weight loss.

Archimedes

The 414hp GT4 does not make more hp than the 475hp 991.1 GT3. Porsche doesn’t under or over rate it’s engines; it has a 5% tolerance.

Drifting

Agree. Someone is playing with the dyno numbers. I'm not going to believe this unless a reputable, impartial, third party does a back to back dyno test on the same day, same dyno, with two stock cars.

However don't get me wrong, I love a mid-engine Porsche. My first P-car was a 987.2 Boxster S and I'm considering adding a Boxster GTS 4.0 in the future, but regarding this test, I think that 718 fanboys are losing a realistic perspective.

JohnC4S

LOL! Porsche will never give you more than what you paid for from my observation.

John

dmk2

My car doesn't feel like it has unexpected power. In fact, it feels a lot like my 981 GT4 without the dips in power over the rev range

hf1

Maybe. I agree the implications would be earth-shattering but I see no reason for Dundon to be doctoring dynos of oem cars and posting them on forums. He posted them in direct response to a question about a comparison. Then there’s this piece of anecdotal evidence by JC from JCR. Maybe he’s just too good of a driver but that’s vs 991.2 GT3 too:

https://rennlist.com/forums/718-gts-4-0-gt4-gt4rs-spyder-25th-anniversary/1198631-how-does-the-718-gt4-compare-with-981-gt4-and-991-1-gt3-on-track-5.html

“718 GT4 is around 2s faster per lap than the 981 GT4 around Silverstone GP Circuit. I would imagine half of that is made up by the N0 to N1 tyre, quite a nice step.

The time I've completed at Silverstone GP in our 718 GT4 is faster than any 991.2 GT3 time that I have seen around there. Make of that what you will but the 718 GT4 is a nice step up from the 981 absolutely no question.

JC”

Goal is to get to the bottom of conflicting data, that’s all. I see no 718 or 991 fanatics here.

It’s commonly known that Porsche under rated the HP of the 996.2 GT3 and that the real HP is much higher than the official 380hp, some say over 400hp. So it wouldn’t be the first time for Porsche to be playing HP games to fit their marketing plans.

Archimedes

Porsche has said publicly multiple times that they pull motors off the line and dyno test them, and any motor testing more than plus or minus five percent from rated hp gets pulled and broken down to determine why it is off. They’ve been doing this for years. There is no way the GT4 is that far underrated or that the GT3 is that far overrated, regardless of what one dyno says (testing on different days). A 60hp swing? Really, you think Porsche actually gave the GT4 way more hp or screwed GT3 buyers that badly? Occam’s Razor would tell us the most likely explanation is different dyno conditions. I’d love to believe that Porsche gave us 450hp for the price of 414, but I doubt it. And I really think reviewers would have noticed it by now.

And lap time isn’t just about hp.

Drifting

Exactly! Truly objective dyno evidence would bear this out. The 718 has more consistent power and torque throughout the rev range than the 981, but it's not suddenly a godzilla of power.

Archimedes

JCR posted dyno comparisons a while back that show just that.

Mech33

Front fenders / arches are wider as well, probably to fit wider front rubber. Happy to see some custom fender work. Wish they would make the rear humps wider as well...

CAlexio

It does not have wider front fenders, and rubber is same.

However, the coolest new attribute which distinguishes the GT4RS from any GT product before it, are the rear quarter based intakes which will feed cold ram-air to the engine finally. I'm very curious how much this will take away from rear trunk space, and what it will do for noise in the car (some intake noise is welcome).

I'm stealing BGB Motorsports images of their custom made retrofit system from another thread to help visualize what these will look like/work like.



https://rennlist.com/forums/gt4/8822...ential-74.html

ExMB

I can’t see a cloodge job like this for production. I think they would somehow use those std storage cubbies under the rear windows, eliminate those, and instead use that space to feed air into the engine compartment. Would it be as efficient? Don’t know. But it would solve some space issues by not having/using big feeder tubes.

jmartpr

+1 on this....you never use those storage spaces and the space could be use to duct the air....but...where do you place the air filters?

Snowy999

Maybe they are brake cooling ducts for the rear? I cam hear the machine guns being cocked as I type!

jmartpr

if we speculate in that direction....I would use the lower ones for brake cooling (and some compartment engine air circulation) now that the engine breaths through he new ones