Because PDK: Some observations after a roll race
03-12-2018, 01:34 AM
#31
I read this whole chat - and still not sure what people are trying to figure out.
03-12-2018, 01:36 AM
#32
Race Director
Thread Starter
03-12-2018, 01:40 AM
#33
Race Director
Thread Starter
No way in hell the GT4 came close to a .2 GT3 manual. Especially from a roll. I have owned both cars. The .2 GT3 has a ton more torque and hp. Just took the GT3 to the track this weekend and it is faster in every way by a large margin. The .2 GT3 manual is faster than a .1 GT3 and probably .1 RS. The manual .2 GT3 have been dynoing over 100 rwhp more than a GT4. There is a video of a manual GT3 beating a Turbo S. My manual GT4 was dead even with a 991.1 Carrera S. A Turbo would leave the GT4 in the dust. The GT4 is a great car and handles realpy well, but straigjt line speed is not its strong suit.
03-12-2018, 02:08 AM
#34
03-12-2018, 02:52 AM
#35
From Evo...
Porsche quotes a 0-62mph time of 3.4 seconds and 197mph flat out for the PDK version, and 3.9 seconds and 198mph for the manual.
The .1 GT3 was quoted at 3.5 seconds by Porsche. I guess i am not sure why Porsche says this? There is a half second difference between the .2 PDK and .2 MT from 0-60. That is pretty significant imo. The .2 PDK is .1 second quicker than the .1 per Porsche. I guess i don’t see why it is such a stretch to think the .1 will be faster than the .2 manual? Even Porsche says it is true.
Not trying to start a controversy, but Porsche’ own estimates have the .1 GT3 about .4 seconds quicker than the .2 MT, and we just did a roll race that essentially confirms that there is a gap. We’ll do another test under controlled circumstances, so maybe things will change, but i don’t see why the results would be that different. Porsche themselves says the .1 is faster. From a dead stop the PDK has an even greater advantage. The .1 should walk away from the .2 manual if Porsche estimates are correct.
Porsche quotes a 0-62mph time of 3.4 seconds and 197mph flat out for the PDK version, and 3.9 seconds and 198mph for the manual.
The .1 GT3 was quoted at 3.5 seconds by Porsche. I guess i am not sure why Porsche says this? There is a half second difference between the .2 PDK and .2 MT from 0-60. That is pretty significant imo. The .2 PDK is .1 second quicker than the .1 per Porsche. I guess i don’t see why it is such a stretch to think the .1 will be faster than the .2 manual? Even Porsche says it is true.
Not trying to start a controversy, but Porsche’ own estimates have the .1 GT3 about .4 seconds quicker than the .2 MT, and we just did a roll race that essentially confirms that there is a gap. We’ll do another test under controlled circumstances, so maybe things will change, but i don’t see why the results would be that different. Porsche themselves says the .1 is faster. From a dead stop the PDK has an even greater advantage. The .1 should walk away from the .2 manual if Porsche estimates are correct.
As I had posted earlier, 0-60 times favour PDK because of launch control. Launch control gives you the perfect launch - perfect revs, perfect clutch disengagement, perfect application of throttle. This is your .5 seconds. Rolling starts take this advantage away.
03-12-2018, 04:16 AM
#36
Rennlist Member
So here is an older video showing how a MK I Turbo S is pulling on a .1 GT3 RS from a rolling start. SCCAForum's video clearly demonstrated that .2 GT3 MT was even with the MK II Turbo S. Standstill start is one thing, but I do not believe .1 GT3 will stands a chance against the .2 in a rolling start. I can't wait to see, and hope someone does it, but think the .2 GT3 may pull away against the .1 RS from a rolling start.
Last edited by gago1101; 03-12-2018 at 04:33 AM.
03-12-2018, 10:54 AM
#37
Race Director
Thread Starter
So here is an older video showing how a MK I Turbo S is pulling on a .1 GT3 RS from a rolling start. SCCAForum's video clearly demonstrated that .2 GT3 MT was even with the MK II Turbo S. Standstill start is one thing, but I do not believe .1 GT3 will stands a chance against the .2 in a rolling start. I can't wait to see, and hope someone does it, but think the .2 GT3 may pull away against the .1 RS from a rolling start.
https://youtu.be/ZAa22Fq1wNo
https://youtu.be/ZAa22Fq1wNo
Assuming the .2 MT should walk away from the .1, what might explain the results we saw? Driver? Seriously doubt it. The start speed? It is possible that these higher start speeds favored the PDK, but we tried different start speeds with same result. Maybe my engine is good and loose? Yeah, maybe. It is possible. Could my Sharkwerks exhaust have helped? I would be surprised. What about altitude? No idea. Gearing of the PDK? There is a slight advantage there.
Why we got these results is the question. Unfortunately the drag strip won’t answer all the questions either, since the PDK will once again have the advantage, due to LC. I guess it is possible that GT4 practically ties .2 GT3, .1 GT3 walks away from GT4, and yet somehow the .2 GT3 then walks away from .1 GT3. But logic would dictate a different result.
Maybe someone else can try to reproduce our results?
03-12-2018, 11:28 AM
#38
Very true, lots of people today in the “have it now” generation aren't interested in spending time learning how to squeeze the performance out of the car, they just want to jump in the first time and be Ricky Bobby so they need the PDK.
03-12-2018, 04:00 PM
#40
Race Director
Thread Starter
03-12-2018, 04:04 PM
#41
Race Director
03-12-2018, 04:06 PM
#42
Race Director
Thread Starter
And other people have driven MT's for decades, are proficient with them and don't "need" a PDK gearbox yet think that it is a better match for the 991 variant of the GT3 than a manual. You may try to paint everyone who prefers PDK in this application as "Rick Bobby", but it's an inaccurate characterization. Peace out.
03-12-2018, 04:19 PM
#44
Race Director
Actually, to the best of my knowledge R&T tests from a standing start. C&D tests from both a standing start and a rolling start (5mph) and publishes separate times for each.
03-12-2018, 05:10 PM
#45
Burning Brakes
