991.2 Carrera T Modifications
09-28-2019 | 09:02 PM
#18
Rennlist Member
Joined: Jul 2018
Posts: 385
Likes: 165
From: socal
Hi Cosmo, is your 7.55 60-130 on Dragy with the Pure Turbo's? Or do you have new/faster results with the Pure's?
09-29-2019 | 05:46 AM
#19
Thread Starter
Racer
Joined: Feb 2010
Posts: 475
Likes: 200
From: UK
Best aftermarket setup I've seen to date. 580WHP is insane! Love the Kline pieces.. Inconel or SS? Would love to hear this beast and see it go.
Couple questions.. Is 7.5 60-130mph correct? That seems rather slow for this power and setup. I know this could be due to taking your time shifting from 3-4th gear... An extra 4.4 seconds to get from 100-130mph doesn't add up... Also, in your MT how far up does 4th gear take you? At 130 or beyond? I just remembered the T has shorter gearing so that maybe the culprit if you have to shift into 5th gear. For reference, in a PDK non T.. 4th gear takes you into the mid 130's.
Lastly, I'm glad you had pleasant dealings with boostaddict. Many gave the guy a hard time and bashed him around here. Not to make this thread about that, but I'm just truly happy to hear good things.
Enjoy!
Couple questions.. Is 7.5 60-130mph correct? That seems rather slow for this power and setup. I know this could be due to taking your time shifting from 3-4th gear... An extra 4.4 seconds to get from 100-130mph doesn't add up... Also, in your MT how far up does 4th gear take you? At 130 or beyond? I just remembered the T has shorter gearing so that maybe the culprit if you have to shift into 5th gear. For reference, in a PDK non T.. 4th gear takes you into the mid 130's.
Lastly, I'm glad you had pleasant dealings with boostaddict. Many gave the guy a hard time and bashed him around here. Not to make this thread about that, but I'm just truly happy to hear good things.
Enjoy!
The timings are down to the manual box and needing to shift from 3rd to 4th around 105mph. As well as the physical shift time (which could orobably be improved), the car loses a bit of boost in the process. I think a PDK car would be easily sub 7secs with this set up. 130mph is done in 4th.
09-29-2019 | 01:03 PM
#22
Burning Brakes
Joined: Feb 2017
Posts: 1,157
Likes: 121
From: Golden, CO
I know Porsche engines are built with some reliability margin, but I wonder if this kind of increase doesn't exceed that margin.
09-29-2019 | 02:03 PM
#23
Three Wheelin'
Joined: Feb 2016
Posts: 1,835
Likes: 610
That's a good question. Back in the 90's, pre-fuel economy concerns, the Japanese engines could easily handle double the power from their stock rating all day long and handle 3x before blowing up because they were built like tanks. With fuel economy gaining priority, parts are designed only as strong as they need to be. Until someone can do a stress analysis on the stock engine components (conrods typically are the first to go, pistons, bearings, cylinder walls, etc) or just beats the hell out of an engine on a road course a different levels of power, we're not going to find out. Probably the closest is 4point0 who is making somewhere over 600hp and tracks his car regularly.
09-29-2019 | 03:09 PM
#24
Thread Starter
Racer
Joined: Feb 2010
Posts: 475
Likes: 200
From: UK
I guess no-one really knows, Ken at 9e who has tuned my car is at edge of his personal comfort zone with my setup, it needs miles to prove it one way or the other. He thinks it will be fine for hooning up to 150mph but not as good beyond as intake temps are 50C+ albeit its warm here right now. A meth setup would be needed to go further and then there's the rods...
09-29-2019 | 03:13 PM
#25
Thread Starter
Racer
Joined: Feb 2010
Posts: 475
Likes: 200
From: UK
Excellent question. We know the motor is up to the 450 hp that the GTS models produce, because the internals of all three 9A2B6 motors are the same. However, generating this amount of power requires about 30 psi of boost--12 more than the GTS has.
I know Porsche engines are built with some reliability margin, but I wonder if this kind of increase doesn't exceed that margin.
I know Porsche engines are built with some reliability margin, but I wonder if this kind of increase doesn't exceed that margin.
I have 7,500 pretty hard miles at 1.5 bar (22 PSI) without probs.
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09-29-2019 | 10:16 PM
#29
Burning Brakes
Joined: Feb 2017
Posts: 1,157
Likes: 121
From: Golden, CO
I hope you end up proving, not finding out, just how durable these engines are.
09-30-2019 | 09:17 AM
#30
Rennlist Member
Joined: Jan 2018
Posts: 3,057
Likes: 788
From: Chitown, USA
BEAST MODE. Congrats guys on some awesome builds! K Nut needs to get back on the dyno after we get the map sorted. Target is 450+ wheel on a mustang (where the aggressive cobb stage 1- before they dialed it back- yielded 404 whp and 450 wtq). If he doesnt hit 450hp, who should he get to remote protune? Mitch, Sambo??? Right now the “custom” Cobb stage 2 map is running only 17-18 psi and he boosting over target instantly, Super smooth and strong AF. Zero traction lmao 