LETS SEE THOSE C5s ON 28" TIRES
12-30-2019, 11:07 AM
#41
Intermediate
No problem, understood, just pointed it out because with it being older a lot of these guys might not be around anymore to answer.
If you're not lowered at all, you have a better chance at getting them to fit, the other thing to watch out for is your wheel offset (or if they stick out of the fender). The guy above got them to fit without being lowered using a stock 18x10.5 C7Z06 wheel with a 5/16" spacer.
If it were me personally, I would not use those tires. They will change your gear ratio enough to most likely make you slower at the strip. First gear will basically end at 60mph and you'll be in 3rd up to about 120mph, making you shift into 4th pretty much at the line. I don't think 560whp is enough power to justify that tall of a tire.
If you want drag specific tires for 18s, look at a 305/35/18. If you want a cheaper, and better, drag setup, I'd personally grab a set of 17" front Z06 wheels and put a set of 275/40/17 DRs on them. 275 drag radials are plenty of grip for 560whp, the extra sidewall will be a tad more forgiving in putting the power down, and that puts your gearing back to "stock"; shifting out of the 3rd around 106mph and in 4th until about 140mph (leaving you some room for when you bump your power up more).
If you're not lowered at all, you have a better chance at getting them to fit, the other thing to watch out for is your wheel offset (or if they stick out of the fender). The guy above got them to fit without being lowered using a stock 18x10.5 C7Z06 wheel with a 5/16" spacer.
If it were me personally, I would not use those tires. They will change your gear ratio enough to most likely make you slower at the strip. First gear will basically end at 60mph and you'll be in 3rd up to about 120mph, making you shift into 4th pretty much at the line. I don't think 560whp is enough power to justify that tall of a tire.
If you want drag specific tires for 18s, look at a 305/35/18. If you want a cheaper, and better, drag setup, I'd personally grab a set of 17" front Z06 wheels and put a set of 275/40/17 DRs on them. 275 drag radials are plenty of grip for 560whp, the extra sidewall will be a tad more forgiving in putting the power down, and that puts your gearing back to "stock"; shifting out of the 3rd around 106mph and in 4th until about 140mph (leaving you some room for when you bump your power up more).
12-30-2019, 11:09 AM
#42
Intermediate
I started the thread , if your not making good WHP (1000whp neighborhood)id stick with a 26” tall tire , if your a manual car id stick with a bias ply tire also ,,( more forgiving on drivtrain) if your just doing it for looks and still have a stock tranny in the car you are gonna have to remove the inner fenderwells and brake ducts ,, my car was runing a TR6060 tranny with RTK offset mounts wich moves the tire back to center of wheel well , i was also running coilovers So i didnt have to remove
12-30-2019, 12:09 PM
#45
Intermediate
12-30-2019, 12:18 PM
#46
AMP Racing
Member Since: Aug 2006
Location: Washington TWP NJ
Posts: 10,450
Received 468 Likes
on
353 Posts
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
I used ECS for my first build in 2008. And my second build in 2012. Still stop in to see them several times a year. Great group up there.
I hope to be using their new dyno in March for my new “lost my mind” build.
Best of success with your goals!
I hope to be using their new dyno in March for my new “lost my mind” build.
Best of success with your goals!
The following users liked this post:
Afdefelice01 (12-30-2019)
12-30-2019, 01:36 PM
#47
Ok thank you, great info. I wish I would have done just a bot more research. I have the wheels/tires mounted, so can't send them back. My wife is NOT going to want to hear I shouldn't use this setup. Not sure about selling them - is there a way to sell these through the forum??
The following users liked this post:
Afdefelice01 (12-30-2019)
