08-13-2015, 03:03 AM | #1 | |
Drives: '16 C7 Z51 Join Date: May 2012
Location: Redmond, WA
Posts: 3,056
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GM's comment on tire pressure for track (From first drive event back in 2014)
Fast forward to 3:39. They state 28 PSI cold is what GM engineers recommended, and asked to shoot for 32-34 PSI hot from the TPMS pressure display. This is 100% consistent with what most owners do anyway, but nice to know GM also recommended similar settings.
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'16 Corvette C7 Z51 1LT (Build Thread)
'14 AGM 1SS 1LE [COTW 11/17/14] (Build Thread) (SOLD) '13 Mazda MX-5 Club (Build Thread) '17 RAM 1500 Crew Cab 4x4 Night Edition '15 Nissan Rogue S AWD |
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08-13-2015, 06:48 AM | #2 |
Drives: '21 ZLE A10 Join Date: May 2012
Location: Mechanicsville, VA
Posts: 6,808
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ditto...these #s felt right to me
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold) |
08-14-2015, 12:06 AM | #3 |
Runs with scissors...
Drives: '14 Z/28s SIM/SW Join Date: Jan 2013
Location: Austin, TX
Posts: 1,439
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That's my absolute target, and once you hit 35 you can feel the tires starting to feel a touch "greasy". Working with a tire guy -- who shows up at HPDE events with a full crew and pyrometers -- has pretty much backed that up. Like GM needed independent verification...
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08-14-2015, 02:51 AM | #4 | |
Drives: '16 C7 Z51 Join Date: May 2012
Location: Redmond, WA
Posts: 3,056
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Quote:
The result? The car was a bit hard to turn in (borderline understeer). I am looking forward to try with real 28 PSI all around. I might even try 27/28 F/R to aid turn-in; we'll see.
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'16 Corvette C7 Z51 1LT (Build Thread)
'14 AGM 1SS 1LE [COTW 11/17/14] (Build Thread) (SOLD) '13 Mazda MX-5 Club (Build Thread) '17 RAM 1500 Crew Cab 4x4 Night Edition '15 Nissan Rogue S AWD |
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08-14-2015, 04:26 PM | #5 |
Drives: 15' Z/28 Join Date: Jun 2015
Location: SoCal
Posts: 38
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Just finished an event this past weekend 33-34 Hot was the sweet spot.
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..all sorts of fast!
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08-14-2015, 05:06 PM | #6 |
Drives: '21 ZLE A10 Join Date: May 2012
Location: Mechanicsville, VA
Posts: 6,808
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35psi & up feels greasy...the Toyo Proxes I ran on the ZL1 felt great at 35-37psi
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold) |
08-18-2015, 03:40 AM | #7 | ||
Drives: '16 C7 Z51 Join Date: May 2012
Location: Redmond, WA
Posts: 3,056
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Just did my second track day with Trofeo Rs, and I honestly had issues when I started at 28 PSI cold. From my build thread:
Quote:
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'16 Corvette C7 Z51 1LT (Build Thread)
'14 AGM 1SS 1LE [COTW 11/17/14] (Build Thread) (SOLD) '13 Mazda MX-5 Club (Build Thread) '17 RAM 1500 Crew Cab 4x4 Night Edition '15 Nissan Rogue S AWD |
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08-18-2015, 09:31 AM | #8 |
Drives: 14 Z/28 0# Join Date: May 2013
Location: NY
Posts: 773
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nice driving !!! nice video !!! more please
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"PTM11" Search & Destroy
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08-18-2015, 08:17 PM | #9 |
Drives: 2014 Z/28 # 89, 69 Camaro, 2013 ZL1 Join Date: Jul 2013
Location: Flint MI
Posts: 669
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Awesome video ! ....what does everybody use to get these video's and all the data on the video. Thanks
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08-18-2015, 09:21 PM | #10 | |
Drives: '16 C7 Z51 Join Date: May 2012
Location: Redmond, WA
Posts: 3,056
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Quote:
I do have a Bluetooth GPS transponder for high accuracy (XGPS160), an OBD II reader over Bluetooth (VGate), and use RaceChrono app to log it all during the track session. I use RaceRender Windows app to overlay it on the (GoPro) video.
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'16 Corvette C7 Z51 1LT (Build Thread)
'14 AGM 1SS 1LE [COTW 11/17/14] (Build Thread) (SOLD) '13 Mazda MX-5 Club (Build Thread) '17 RAM 1500 Crew Cab 4x4 Night Edition '15 Nissan Rogue S AWD |
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08-19-2015, 07:47 AM | #11 |
Drives: '21 ZLE A10 Join Date: May 2012
Location: Mechanicsville, VA
Posts: 6,808
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That is a great video with nice data overlay. You are an excellent driver too. Not many cars are going to pass you!!
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold) |
08-19-2015, 08:09 PM | #12 |
Drives: '16 C7 Z51 Join Date: May 2012
Location: Redmond, WA
Posts: 3,056
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Thank you! These are great cars to drive at the track.
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'16 Corvette C7 Z51 1LT (Build Thread)
'14 AGM 1SS 1LE [COTW 11/17/14] (Build Thread) (SOLD) '13 Mazda MX-5 Club (Build Thread) '17 RAM 1500 Crew Cab 4x4 Night Edition '15 Nissan Rogue S AWD |
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