Prospective 981 GT4 Owners Discussion Forum.
Discussion
APOLO1 said:
but if they repeated the test 20 times in row, the CCBDS would stop sooner, the new CCBDs have the similar coating that is on the P1, they no longer hold the heat, over 20 track days plus V-max on my RHD GT3, still on original pads just over 50% worn....
Depends on the pads fitted on the iron brake cars 
Stock factory pads fully agreed.. with a decent-ish track pad however..... APOLO1 said:
isaldiri said:
At risk of sounding like a stuck record as it has been said previously here before..... braking distances are going to be tyre limited and not brake limited on road cars.
Sportauto recent comparison with a 991 C2S with iron brakes vs a 991 GTS with ceramics, both on identical Pirelli tyres had the GTS record worse braking distances than the iron brake C2S.
but if they repeated the test 20 times in row, the CCBDS would stop sooner, the new CCBDs have the similar coating that is on the P1, they no longer hold the heat, over 20 track days plus V-max on my RHD GT3, still on original pads just over 50% worn....Sportauto recent comparison with a 991 C2S with iron brakes vs a 991 GTS with ceramics, both on identical Pirelli tyres had the GTS record worse braking distances than the iron brake C2S.
I had a 996.1 GT3 (steel brakes) and on tracks with big stops experienced no fade but the front discs did warp despite plenty of cool-down. However the 996.1 GT3 had inadequate brake cooling ducts and the discs were 330mm one-piece vs 380mm composite on the 10 kg lighter GT4 in which I trust Porsche has invested its subsequent experience in ducting.
Therefore I think braking performance on the GT4 is a non-issue. The choice depends first on whether you will do enough track work to wear ceramics out. I doubt many owners will but if you are one of those, get steel for the far lower replacement cost. If not it then depends on the value you place on ceramics' slightly better bump control and slightly lower steering inertia, less brake dust, no corrosion, and whether you will drive the car hard enough to avoid steel brake replacements.
These advantages are tempting and would be worthwhile if you could recoup pro rata on resale but according to my dealer in France I won't come close so I don't think I can justify a price increase of 8% of the car given that it comes over-endowed with 991 GT3 brakes as standard.
As I mentioned in previous posts I used to have a 996.1 GT3 and have a GT4 on order. The Metzger engine in the GT3 was thrilling in the way its vibrato midrange growl changed at 6,000 rpm (as the flaps operated to shorten the intake tracts) to a race engine howl and it leapt for the redline. The GT4 has higher peak torque and power and a lot more torque at lower revs but because it develops its torque at lower revs the power curve tapers off at 6000 rpm instead of ramping up. Will the thrills of the extra performance be a match for the subjective qualities of the Metzger? Has anyone driven a 991 Carrera S and a GT3 to be able to make the engine comparison?
turbofreeFLAT6 said:
As I mentioned in previous posts I used to have a 996.1 GT3 and have a GT4 on order. The Metzger engine in the GT3 was thrilling in the way its vibrato midrange growl changed at 6,000 rpm (as the flaps operated to shorten the intake tracts) to a race engine howl and it leapt for the redline. The GT4 has higher peak torque and power and a lot more torque at lower revs but because it develops its torque at lower revs the power curve tapers off at 6000 rpm instead of ramping up. Will the thrills of the extra performance be a match for the subjective qualities of the Metzger?
Enjoy your posts, keep it coming. 
It's a pity Motorsport didn't give the 3.4 the full GT treatment. For the same specific output as the 991 GT3 it would develop 430 PS. With a 9000 rev limit. Perfect. Except for the price: it would probably cost nearly as much to make as the GT3.
Which would you choose if you could? The current bargain or the full business?
Which would you choose if you could? The current bargain or the full business?
franki68 said:
the main worry for whom ? I'm certainly not worried in fact after driving numerous 991s a bit of lower down ooomph is needed.
I have no doubt whatsoever that the majority of buyers agree with you.I dont. I want a straight line of torque and bhp building to an exciting and frenetic crescendo.
Mid range spikes of torque is for diesel turbos.
anonymous said:
[redacted]
I have a 997.2 GTS and 996.2 GT3Over the last 1000rpm the GTS (6500-7500rpm) it feels like it pulls just as strong as the GT3 engine. The GTS does have the X51 unit though, so I don't know how much of that too end zip can be attributed to that or if the GT4 lump will feel similar. My point being though that the standard DFi engines can be made to feel as good (or pretty damned close) to the Mezger at the top end in terms of performance.
But it does lack the character of the GT3 engine though, no matter how potent it feels.
The thing I particularly like about the GT4 engine spec is the reason I like driving in the wet.
Making the car behave on the throttle as well as the steering, and holding a car between the hands and right foot, is poetry in motion.
The mid range torque of the mid engined, compact and comparatively light weight GT4, should be wonderful.
I can't wait.
Race Yellow, Clubsport, PCCB, Sound, Passenger three point, Bucket seats, plus a few cosmetics ....
Making the car behave on the throttle as well as the steering, and holding a car between the hands and right foot, is poetry in motion.
The mid range torque of the mid engined, compact and comparatively light weight GT4, should be wonderful.
I can't wait.
Race Yellow, Clubsport, PCCB, Sound, Passenger three point, Bucket seats, plus a few cosmetics ....
Custard Beast said:
Anyone care to share their chosen spec?
Is it pathetic I'm gutted there are no parking sensors to protect those expensive bumpers?? Current car has front and back!
With you. Wondering if I'll regret the lack of lift option with London's speed humps.Is it pathetic I'm gutted there are no parking sensors to protect those expensive bumpers?? Current car has front and back!
Friends with 991 GT3 had same problem but with a bigger wing to deal with. Both have neat retrofits, one with camera that looks OEM.
ChrisW. said:
The thing I particularly like about the GT4 engine spec is the reason I like driving in the wet.
Making the car behave on the throttle as well as the steering, and holding a car between the hands and right foot, is poetry in motion.
The mid range torque of the mid engined, compact and comparatively light weight GT4, should be wonderful.
I can't wait.
Race Yellow, Clubsport, PCCB, Sound, Passenger three point, Bucket seats, plus a few cosmetics ....
I have absolutely no idea what the above means. Maybe its a language I do not understand?Making the car behave on the throttle as well as the steering, and holding a car between the hands and right foot, is poetry in motion.
The mid range torque of the mid engined, compact and comparatively light weight GT4, should be wonderful.
I can't wait.
Race Yellow, Clubsport, PCCB, Sound, Passenger three point, Bucket seats, plus a few cosmetics ....
mollytherocker said:
I have absolutely no idea what the above means. Maybe its a language I do not understand?
Relatively easily controlled oversteer on demand. It's what I hope in the GT4 will make up for the lack of character compared to a GT3 engine, particularly a Metzger. While I found my 996.1 GT3 easy to play with on a skidpan or circuit, its rear engined traction and momentum was too challenging for my ability on the less predictable cambers, undulations and grip levels of public roads.Gassing Station | Porsche General | Top of Page | What's New | My Stuff