05-05-2020, 09:20 PM | #1 |
Drives: 2018 Camaro 2SS A8 Join Date: Dec 2019
Location: Windsor, Ontario, Canada
Posts: 90
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305/45/17 ET Street R Tire Pressure?
Just picked up my RaceStars & 305/45/17 ET Street R's today
Was curious what kind of air pressure everyone is finding works best. Seems like a lot of people I talked to are running in the 18-21psi range. Unfortunately the tracks are not open here yet, so street tuning and Dragy #'s is the best I have to work with for now.
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2018 Camaro 2SS A8 Redline Edition
Last edited by BDPhoto519; 05-10-2020 at 02:12 PM. |
05-06-2020, 05:22 PM | #2 |
Yea... all closed down here as well! You want to run as much air as you c an in them... My power level I run 18Lbs with a 1.42 60Ft. Same exact tire I run!
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2018 ZL1-NFG-A10
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05-07-2020, 03:53 PM | #3 | |
Drives: 2018 Camaro 2SS A8 Join Date: Dec 2019
Location: Windsor, Ontario, Canada
Posts: 90
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Quote:
Yeah that's the plan, probably start around 18 and work my way up until i start to see the 60's drop. Was just curious what everyone else was running on these cars. Hopefully the tracks open soon!
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2018 Camaro 2SS A8 Redline Edition
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05-07-2020, 04:43 PM | #4 |
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Drives: 2017 Hyper Blue A10 ZL1 Join Date: Nov 2016
Location: London, KY
Posts: 2,015
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I'm running Hoosier, but they could be relative. Last time I ran, I was dead hooking with 24. I've mostly ran 18 to 20. All depends on the track prep and conditions.
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05-08-2020, 09:43 AM | #5 |
Drives: 2016 Camaro SS Join Date: Sep 2018
Location: Bartlett, TN
Posts: 1,121
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Around 20 was what I found to hook the best at the track, I run them at 25 on the street.
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05-08-2020, 01:42 PM | #6 |
Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
Posts: 8,857
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My best 60 ft is 1.35 with the same tire on 19 psi.
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2022 Lt1 6.2 A10, Maggie 2300, THPSI Port Inj/10 rib, Rotofab, E, Nickey, SCOL, Griptech, RC Bandits, Hoosiers/MT 9.80@142.96 1.44 60ft, 6.34@112 707/669 RWHP/TRQ. 16SS Maggie 2650 9.41@147 1.35 60ft, 5.99@119. 16 C7 A8 10.90@128 Bolt on stuff
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05-08-2020, 07:56 PM | #7 |
Drives: 2018 Camaro 2SS A8 Join Date: Dec 2019
Location: Windsor, Ontario, Canada
Posts: 90
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Thanks gents,
The temps dropped here the past day or so out of the blue, we actually got some flurries this morning. So will have to give it a few days to warm back up again so I can make a run to Mexico and give these a try...
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2018 Camaro 2SS A8 Redline Edition
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05-08-2020, 10:26 PM | #8 |
Drives: 2018 Camaro 2SS A8 Join Date: Dec 2019
Location: Windsor, Ontario, Canada
Posts: 90
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Is anyone changing the tire size scaling in HPTuners to keep all the mph/etc in proper calibration when running the DR's vs Street tires?
I haven't physically measure the height difference between the stock wheels, although I'm sure it close.
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2018 Camaro 2SS A8 Redline Edition
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05-09-2020, 12:02 PM | #9 | |
Drives: 2016 Camaro SS Join Date: Sep 2018
Location: Bartlett, TN
Posts: 1,121
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Quote:
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05-09-2020, 12:46 PM | #10 |
Drives: 2017 Camaro 1SS Join Date: Aug 2016
Location: NH
Posts: 1,692
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I had that same tire before and there is no question that it's taller than the stock SS tire. Made the unadjusted speedometer read lower.
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05-09-2020, 03:25 PM | #11 | |
Drives: 2018 Camaro 2SS A8 Join Date: Dec 2019
Location: Windsor, Ontario, Canada
Posts: 90
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Quote:
I am not too worried about the speedo being off, but alot of the trans related stuff like shift points are based off mph I believe so I would like to keep it consistent.
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2018 Camaro 2SS A8 Redline Edition
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05-09-2020, 03:43 PM | #12 |
Drives: 2016 Camaro SS Join Date: Sep 2018
Location: Bartlett, TN
Posts: 1,121
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I'm not sure what you guys are talking about but a 305/45/17 is a 28 inch tire just like the stock 20s. If it is different it is by a very small percentage like .20 or something and won't affect the speedo enough to even worry about.
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05-09-2020, 03:47 PM | #13 |
Drives: 2016 Camaro SS Join Date: Sep 2018
Location: Bartlett, TN
Posts: 1,121
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I just looked it up and the stock tire is 27.58 and the 305/45/17 is 27.8 which is not enough difference to even notice.
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05-10-2020, 01:16 AM | #14 | |
Drives: 2018 Camaro 2SS A8 Join Date: Dec 2019
Location: Windsor, Ontario, Canada
Posts: 90
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Quote:
I appreciate the info!
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