Track use tire size
Thread Starter
Instructor
Joined: Mar 2022
Posts: 108
Likes: 44
From: Florida
Track use tire size
I have been tracking my 2023 C8 with both the stock wheels/tires setup and a Apex wheels and RT660 setup of 255/35R18 in the front and 305/30R19 in the rear. I bought the Apex wheels expecting to do more Autox and then fell in love with track days so very rarely do Autox now. I drive my car to the track and am wondering what sizes are best for track use? Stock size or wider? Also, my car is not stock now and is pushing 680whp. Any recommendations on sizes or tires? Tire availability is also a consideration as it it quite limited in the larger sizes. I was thinking of getting the Apex SM10RS in 18x10 and 19x12 with the Goodyear Eagle F1 Supercar 3Rs in 275/35R18 and 325/30R19s. I looked in the forum for this info but it was mostly just wheel sales. Wanting some expert opinions on this. thanks JJ
Instructor
Joined: Nov 2023
Posts: 209
Likes: 149
I had sm10rs wheels on my c7. They were great, and I went with apex's recommendations for tire sizes. They usually work out what works best for street and track, including if the wheel/tire combination rubs or not.
Le Mans Master
Joined: Feb 2009
Posts: 5,169
Likes: 199
From: Your Sister's Bedroom
I have been tracking my 2023 C8 with both the stock wheels/tires setup and a Apex wheels and RT660 setup of 255/35R18 in the front and 305/30R19 in the rear. I bought the Apex wheels expecting to do more Autox and then fell in love with track days so very rarely do Autox now. I drive my car to the track and am wondering what sizes are best for track use? Stock size or wider? Also, my car is not stock now and is pushing 680whp. Any recommendations on sizes or tires? Tire availability is also a consideration as it it quite limited in the larger sizes. I was thinking of getting the Apex SM10RS in 18x10 and 19x12 with the Goodyear Eagle F1 Supercar 3Rs in 275/35R18 and 325/30R19s. I looked in the forum for this info but it was mostly just wheel sales. Wanting some expert opinions on this. thanks JJ
Sr.Random input generator
Joined: Jan 2008
Posts: 7,790
Likes: 2,223
From: Sammamish, WA
I presume this is a Z51? With that much power, I'd also be worried about the powertrain longevity as well as cooling. Road course track is much more demanding than autocross on the powertrain. If you haven't already, I'd highly recommend V09 mod for cooling.
Burning Brakes
Joined: Jul 2023
Posts: 848
Likes: 420
From: Ma
I ran 295 front 325 rear and it was a great balance. This was with MCS coilovers and AFE sways as well dramatically increasing rear stiffness.
I have X25's BC Forged 18" track wheels for sale if you need wheels. Bought them to run next season but upgraded to Z06.
I have X25's BC Forged 18" track wheels for sale if you need wheels. Bought them to run next season but upgraded to Z06.
Thread Starter
Instructor
Joined: Mar 2022
Posts: 108
Likes: 44
From: Florida
I was running 255 and 305 as I was autoxing and kept it SS class. I don't autox anymore so I used this setup for the track sometimes but I definitely need a better setup. PM me a picture and stats for your BC wheels. I was looking at buying Apex wheels again, but maybe the BC wheels will be a better setup. Thanks
Thread Starter
Instructor
Joined: Mar 2022
Posts: 108
Likes: 44
From: Florida
I found your for sale post for the BC wheels. Haven't decided how I what wheels/setup I want to go with yet. Thanks sir, jj
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Intermediate
Joined: Jan 2024
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I have been tracking my 2023 C8 with both the stock wheels/tires setup and a Apex wheels and RT660 setup of 255/35R18 in the front and 305/30R19 in the rear. I bought the Apex wheels expecting to do more Autox and then fell in love with track days so very rarely do Autox now. I drive my car to the track and am wondering what sizes are best for track use? Stock size or wider? Also, my car is not stock now and is pushing 680whp. Any recommendations on sizes or tires? Tire availability is also a consideration as it it quite limited in the larger sizes. I was thinking of getting the Apex SM10RS in 18x10 and 19x12 with the Goodyear Eagle F1 Supercar 3Rs in 275/35R18 and 325/30R19s. I looked in the forum for this info but it was mostly just wheel sales. Wanting some expert opinions on this. thanks JJ
Currently running BC Forged with Hoosier 295 front and 345 rear.
Burning Brakes
Joined: Jun 2014
Posts: 1,043
Likes: 125
Can you share where you heatshielded, maybe with pictures if you have them? Gearing my 2024 up for tracking in 2025...
Burning Brakes
Joined: Jul 2023
Posts: 848
Likes: 420
From: Ma
Thread Starter
Instructor
Joined: Mar 2022
Posts: 108
Likes: 44
From: Florida
Yeah told by the Chevy dealer who picked it up an oil line touched the header and sprayed the wiring causing the fire. Headers were coated, but did no good with the excessive heat. They are now coated and wrapped plus heat shielding will be covering all those wire now.
Thread Starter
Instructor
Joined: Mar 2022
Posts: 108
Likes: 44
From: Florida
Asking for help or advice on this now. My engine harness is on National backorder and the car is going to continue to just sit there until we get a new one. Part number is 85635882. Does anyone have any advice on how to get one? Where are they made or who do I bribe
thanks! jj
thanks! jj
Le Mans Master
Joined: Jun 2005
Posts: 5,037
Likes: 520
From: Texas
Check junk yards.
PS, I have been told multiple times to never coat and wrap headers. It's one or the other. The combination damages the coating causing it to come off (making it less effective). If you need more, I'd see if you can restore the factory shielding and see if you can modify it to work with your headers.
PS, I have been told multiple times to never coat and wrap headers. It's one or the other. The combination damages the coating causing it to come off (making it less effective). If you need more, I'd see if you can restore the factory shielding and see if you can modify it to work with your headers.
Thread Starter
Instructor
Joined: Mar 2022
Posts: 108
Likes: 44
From: Florida
I am checking junk yards now in fact. Turns out too many of us C8 owners installed headers and it roasting the harness connectors. I coated my headers by a local reputable shop and it still burned through. That ain't happening again though thanks for the advice
thanks for the advice