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Porsche has managed to achieve pretty excellent torque/L efficiency with the new 4.0L engine (GT3 = 84.75 ft.lbs/L; GT3 RS 86.5 ft.lbs/L.) The GT4 3.8L engine was 81.3 ft.lbs/L; nothing to sneeze at, but room for improvement. With the bump in displacement and a small improvement in breathing, there's no reason a GT4 4.0 couldn't have 330 ft/lbs of torque, probably lower down in the rev range.
The last GT4 (310 ft-lbs) was artificially limited in peak torque (I believe due to a limitation in the gearbox or just marketing). 330 ft-lbs would be a gain of 6% over the last GT4 (not earth-shaking - roughly equivalent to descending 2,000 ft in elevation), but noticeable. However, why would you expect the torque to be available at lower rpms when the GT3 and GT3 RS peak at 6k rpm or higher and the last GT4 was at 4,750 rpm?
Lowering the gearing could be a much bigger improvement in torque to the ground than 6% as gears works as a torque multiplier. 10% improvement would be easily attainable through gearing, but impossible with 4.0L NA motor alone. Of course, the best outcome would be from a combination of more torque, a higher redline, and better gearing made possible from the higher redline (as achieved in GT3 and RS).
Porsche would do well to offer retro fitting for that tungsten coated brake disc. It's like the best of both worlds. No dust but great braking performance!
Porsche would do well to offer retro fitting for that tungsten coated brake disc. It's like the best of both worlds. No dust but great braking performance!
Hmm no.
Those PFC steel racing brakes are simply amazing. Out performance any street brakes. PCCB, or steel or the new coated ones. Not even close.
Additionally, the CS brake calipers are a lot smaller so that they can fit in the 18" wheel as reqd by GT4 rules.
I would really like a conversion kit for that.
Can you tell us how much they cost and how long they last ??
Can't quite tell you that. The GT4CS have the PFC brakes as standard.
When I bought my ClubSport, I purchased the Spares package for US$9500. Consists of 2 complete sets of rotors, and 4 complete sets of brake pads.
The original sets of pads that shipped with the car lasted around 5500km track miles, it was down to 20%. I had them replaced together with new rotors.
Size wise, they are 380mm both front and rear, 380mmx32mm for front and 380mm for rear.
I get such a kick out of reading these posts!
sitting hear laughing to myself
So many trying to play Sherlock Holmes, when we have our own in-house detective, in Woopsie
Personally I think Porsche is eating this up sending out cars with exhausts that are muffled and disguised
This creates all the speculation and fervor...
Additionally, the CS brake calipers are a lot smaller so that they can fit in the 18" wheel as reqd by GT4 rules.
I would really like a conversion kit for that.
DeMan Motorsports can do that for you using other Porsche parts. There were videos posted a ?year? ago about a group visit to DeMan - very interesting to hear their story
DeMan Motorsports can do that for you using other Porsche parts. There were videos posted a ?year? ago about a group visit to DeMan - very interesting to hear their story
Yes, I remember that well, but that solution was using the 997GT3RS calipers and is far from ideal. There is still barely any gap so stones will get caught and it will suffer poor cooling a lot of heat soak issues.
I get such a kick out of reading these posts!
sitting hear laughing to myself
So many trying to play Sherlock Holmes, when we have our own in-house detective, in Woopsie
Personally I think Porsche is eating this up sending out cars with exhausts that are muffled and disguised
This creates all the speculation and fervor...
those guys who have access might be right, but you can’t blame those folks who are skeptical because those cleaning ladies arent quotable sources.
Last edited by Five12Free; 05-03-2018 at 08:04 AM.
Yes, I remember that well, but that solution was using the 997GT3RS calipers and is far from ideal. There is still barely any gap so stones will get caught and it will suffer poor cooling a lot of heat soak issues.
Yes, I liked his comments about how track guys aren't **** about caught stone grooves. I would have thought decent ducting would address cooling but DeMan would know far more than I.
05-02-2018, 05:55 PM
