Tracking the 992 Turbo
01-11-2021, 04:04 PM
#16
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BND (01-15-2021)
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01-12-2021, 12:08 AM
#18
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That's going to be fun on track in a few years, Karl. What do you have planned for it as of now, besides wearing down those current Pirellis?
01-12-2021, 11:39 AM
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OK, I've been doing quite a bit of work on this before I contemplate getting a 992 TTS for track duty. There are still some unknowns, but there appear to be quite a few similarities with the 991.2 that will cross over. I will try to keep this updated as aftermarket parts become available:
Brakes - for now, there are no steel rotor options to replace PCCB. I'd either go with a Turbo or drive the PCCB, but replace the pads at 6mm with OEM pads, nothing else until I can replace the rotors. Girodisc is planning a replacement rotor in 2021 sometime, so that's enough for me to go on. Tarret is confirming the correct length for caliper studs, but they are a must have, too.
Tires - the 991.2 GT2RS/GT3RS tire choices will easily and perfectly fit the 992 wheels, so I'd swap out to Cup2 R 265/325 for hero laps, and stick with Cup2 or Dunlop for lapping. No slicks on the horizon. Honestly any choice you like for the 991.2 GT2/3RS is a perfect choice. I would not even consider using any of the current 255/315 choices on TireRack.
Wheels - So very happy to see the car move to 20/21". The best option for me is HRE R101LW, and they are getting back to me to confirm the GT2RS wheels will work or if the offset is close enough...I think it will be, but I will be going that route with 9.5" fronts, 12.5" rears at some point. Especially true if the car is not lowered.
Exhaust - not needed as badly as the 991 gen, and adequate until aftermarket catches up - I'll be looking to Sharkwerks very soon. For 2021, stock exhaust will be more than fine for track duty. Everybody else will be making something by Summer.
Suspension - Not a lot of action on lowering springs right now, but TPC Racing does have a DSCbox V3 already working. That's a must have option. My gut tells me Techart and others will quickly have springs, since the car is basically a 991.3.
Exterior - the only concern currently is wind buffeting with the windows down. Update: Awe Tuning does have a "Foiler" for the 992 already out. The car still also desperately needs grills for the front. Not sure who's working that, but probably Rennline will be first. Tow hooks, Rennline is confirming now, but I'm pretty sure they have a length that will fit already. As for paint wrap, I'd skip the Porsche options and go with a good Xpel 10m "track pack" including the leading edge of the roof and A pillars.
Interior - Cantrell Motorsports and others are confirming their 991 half-cages will simply still work. If/when I can get the one-piece buckets, I'd go with those and use the Schroth harnesses made exclusively for that seat (yes, it's 4-point, and yes, it's PCA approved) I already have a pair of Misano Cobra's that I could also easily swap in and just use a standard Schroth 6-point harness from HMS.
Battery - I would try to avoid the Porsche LiFePo battery and get an aftermarket AntiGravity 40. It's smarter, lighter, and far cheaper when it comes to replacement time. No brainer.
Tune - I will simply just wait for Sam at ByDesign to tell me when, but....For track work, tunes almost always REDUCE lap times, as Sam will generally agree.
Data - I am very happy with the AIM Solo DL with Smartycam, but I also have discovered the Garmin Catalyst and would probably stick with that.
The 992 TTS is going to be an unfair advantage on track, and I bet I could break 1:58 at VIR with only the mods confirmed so far above. Does anybody have any intel to add to this?
Brakes - for now, there are no steel rotor options to replace PCCB. I'd either go with a Turbo or drive the PCCB, but replace the pads at 6mm with OEM pads, nothing else until I can replace the rotors. Girodisc is planning a replacement rotor in 2021 sometime, so that's enough for me to go on. Tarret is confirming the correct length for caliper studs, but they are a must have, too.
Tires - the 991.2 GT2RS/GT3RS tire choices will easily and perfectly fit the 992 wheels, so I'd swap out to Cup2 R 265/325 for hero laps, and stick with Cup2 or Dunlop for lapping. No slicks on the horizon. Honestly any choice you like for the 991.2 GT2/3RS is a perfect choice. I would not even consider using any of the current 255/315 choices on TireRack.
Wheels - So very happy to see the car move to 20/21". The best option for me is HRE R101LW, and they are getting back to me to confirm the GT2RS wheels will work or if the offset is close enough...I think it will be, but I will be going that route with 9.5" fronts, 12.5" rears at some point. Especially true if the car is not lowered.
Exhaust - not needed as badly as the 991 gen, and adequate until aftermarket catches up - I'll be looking to Sharkwerks very soon. For 2021, stock exhaust will be more than fine for track duty. Everybody else will be making something by Summer.
Suspension - Not a lot of action on lowering springs right now, but TPC Racing does have a DSCbox V3 already working. That's a must have option. My gut tells me Techart and others will quickly have springs, since the car is basically a 991.3.
Exterior - the only concern currently is wind buffeting with the windows down. Update: Awe Tuning does have a "Foiler" for the 992 already out. The car still also desperately needs grills for the front. Not sure who's working that, but probably Rennline will be first. Tow hooks, Rennline is confirming now, but I'm pretty sure they have a length that will fit already. As for paint wrap, I'd skip the Porsche options and go with a good Xpel 10m "track pack" including the leading edge of the roof and A pillars.
Interior - Cantrell Motorsports and others are confirming their 991 half-cages will simply still work. If/when I can get the one-piece buckets, I'd go with those and use the Schroth harnesses made exclusively for that seat (yes, it's 4-point, and yes, it's PCA approved) I already have a pair of Misano Cobra's that I could also easily swap in and just use a standard Schroth 6-point harness from HMS.
Battery - I would try to avoid the Porsche LiFePo battery and get an aftermarket AntiGravity 40. It's smarter, lighter, and far cheaper when it comes to replacement time. No brainer.
Tune - I will simply just wait for Sam at ByDesign to tell me when, but....For track work, tunes almost always REDUCE lap times, as Sam will generally agree.
Data - I am very happy with the AIM Solo DL with Smartycam, but I also have discovered the Garmin Catalyst and would probably stick with that.
The 992 TTS is going to be an unfair advantage on track, and I bet I could break 1:58 at VIR with only the mods confirmed so far above. Does anybody have any intel to add to this?
Give us a couple of weeks! we have some HUGE things in store.
The following 5 users liked this post by Fabspeed Motorsport:
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Pad Bender (01-12-2021)
01-12-2021, 11:23 PM
#21
Burning Brakes
But , as time go by, things will evolve , I can not help myself!
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ER911S (01-13-2021)
01-13-2021, 02:27 PM
#22
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Brakes update:
I talked to Mike Owen at Girodisc. They are ready to engage on a brake system for the 992 TTS with PCCB. They concluded that the 420mm front rotors and 10-piston calipers are essentially from the Cayenne. They have a few different thoughts in mind to try, but the large rotor will have challenges on weight and the lack of aftermarket pads. They have several avenues, but need a car in the shop to do measurements, and later for test fitment. Anybody with a 992 TTS willing to visit them in Bellingham, Washington?
Next up, I traded emails with Jeff at Essex, the distributor for AP racing and Ferrodo pads. They are in the same boat - ready to start designing rotor options, pad options, and caliper replacement options as soon as they can get a car in for measurements, and back for test fitment. Anybody near Charlotte, NC that can lend their car for the collective good?
Bottom line, we're probably 6-8 months away from having a replacement "track" solution for the 992 TTS, which is fine. The current PCCB rotors can easily do a season without wearing them out, but just be sure to replace those pads when they hit 6mm thickness...no need to take a chance on going thinner than that. I ruined two 991 TTS PCCB rotors a few years ago when they measured 4mm right before I went on track. Not worth it.
I talked to Mike Owen at Girodisc. They are ready to engage on a brake system for the 992 TTS with PCCB. They concluded that the 420mm front rotors and 10-piston calipers are essentially from the Cayenne. They have a few different thoughts in mind to try, but the large rotor will have challenges on weight and the lack of aftermarket pads. They have several avenues, but need a car in the shop to do measurements, and later for test fitment. Anybody with a 992 TTS willing to visit them in Bellingham, Washington?
Next up, I traded emails with Jeff at Essex, the distributor for AP racing and Ferrodo pads. They are in the same boat - ready to start designing rotor options, pad options, and caliper replacement options as soon as they can get a car in for measurements, and back for test fitment. Anybody near Charlotte, NC that can lend their car for the collective good?
Bottom line, we're probably 6-8 months away from having a replacement "track" solution for the 992 TTS, which is fine. The current PCCB rotors can easily do a season without wearing them out, but just be sure to replace those pads when they hit 6mm thickness...no need to take a chance on going thinner than that. I ruined two 991 TTS PCCB rotors a few years ago when they measured 4mm right before I went on track. Not worth it.
Last edited by Randyc151; 01-13-2021 at 02:28 PM.
01-13-2021, 02:42 PM
#23
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Thanks for the updated.
I Girodisc solution for TT 408/380mm steelies would be a welcome solution as well. Ran them in the past with pleasure.
Not sure if this will be the same size setup as on 992 GT3s.
I Girodisc solution for TT 408/380mm steelies would be a welcome solution as well. Ran them in the past with pleasure.
Not sure if this will be the same size setup as on 992 GT3s.
01-13-2021, 03:51 PM
#24
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I should have mentioned that Girodisc is already working on the steel solution for the TT, but they also still need a car to measure and test.
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Pad Bender (01-18-2021)
01-18-2021, 09:08 AM
#27
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Just to put this info early in this thread: Porsche "recommends" very high street tire pressures for these cars, but not because they perform better at higher pressure - it's a legality thing, and they are covering their own backside. On the street with Michelin Cup2, I've kept tire pressure at 34 front, 36 rear on a variety of cars over the years, and it's perfect. On track, I go out at 26-27psi cold all around and do two warm up laps, the first gentle and the second moderate, and the third like a hot qualifying lap. After that, I like a window between 30 hot at 35 hot all around, and come off track if a tire reaches 36psi. In a perfect world, on a perfect lap, I'd like all four tires at 32psi hot.
This info comes from years of trial/error, and from aggregating many, many sources over on the "991 Turbo Track Car" thread on the 991 forum. You might want to read through that forum if this is all new to you, and you plan to track your 992 regularly in the future.
This info comes from years of trial/error, and from aggregating many, many sources over on the "991 Turbo Track Car" thread on the 991 forum. You might want to read through that forum if this is all new to you, and you plan to track your 992 regularly in the future.
Last edited by Randyc151; 01-18-2021 at 10:33 AM.
01-18-2021, 10:28 AM
#28
Rennlist Member
Just to put this info early in this thread: Porsche "recommends" very high street tire pressures for these cars, but not because they perform better at higher pressure - it's a legality thing, and they are covering their own backside. On the street with Michelin Cup2, I've kept tire pressure at 34 front, 36 rear on a variety of cars over the years, and it's perfect. On track, I go out at 26-27psi cold all around and do two warm up laps, the first gentle and the second moderate, and the third like a hot qualifying lap. After that, I like a window between 30 hot at 35 hot all around, and come off track if a tire reaches 36psi. In a perfect world, on a perfect lap, I'd like all four tires at 32psi hot.
This info comes from years of trial/error, and from aggregating many, many sources over on the "991 Turbo Track Car" thread on the 991 forum. You might want to read through that forum if this is all new to you, and you plan to track your 992 regularly in the future.
This info comes from years of trial/error, and from aggregating many, many sources over on the "991 Turbo Track Car" thread on the 991 forum. You might want to read through that forum if this is all new to you, and you plan to track your 992 regularly in the future.
01-18-2021, 10:50 AM
#29
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01-18-2021, 07:17 PM
#30
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The AntiGravity batteries are a drop in replacement for the OEM battery, weigh 35-40 pounds less depending on the size you get, and have a built in cutoff that saves the battery from an overcharge situation. If the battery drains too low from sitting too long with a power drain, it has a reset button and remote control so you can turn the battery back on with still enough juice to either restart the car or at least open the frunk. The weight savings is awesome, especially considering how high up in the car the battery location is. Also, they are much cheaper than Porsche lithium batteries, under $900 for the largest/heaviest option. Track tested an approved!
H5/Group-47 Lithium Car Battery – Antigravity Batteries
H5/Group-47 Lithium Car Battery – Antigravity Batteries
Last edited by Randyc151; 01-18-2021 at 07:18 PM.