Jan_N

Does anyone has suggestions for track alignment with Hoosiers on a C7 Z51. I basically run 275 / 295 A7’s and 295 / 315 a7’s. On 2 different sets of rims. First 0ne 8.5 and 10 inch wide the other 10.5 and 11 inch wide. All 18 inch wheels. I run the recommended track alignment that GM recommends but after 10-12 sessions HPDE of 20-25 minutes the outside cords mostly the front but sometimes also the rear.

rb185afm

Hoosiers like to be -2.8 to -3.0 camber. GM track alignment specs are for stock tires. The Hoosiers create enough grip to keep rolling the tire over in a corner. I found the stock bushings have to much flex with Hoosiers, even with my alignment at -2.8. I am now on LG Monoball bushings and a locking camber kit.

Also, get your alignment rechecked if you run slicks without some kind of camber locking kit. I was pushing my alignment way out of wack in a single track day from the grip generated with my R7’s.

Jan_N

Thanks for your quick reply. Do you use that camber on fronts and rears?

village idiot

how is the ride and noise?

rb185afm

My current specs. As I have solid bushings and the locking camber kit, I can ease up on my camber a bit to save a little street life. At least hats my theory. Testing in process.

rb185afm

More than acceptable for the level of added driving feel and control. The car just goes exactley where you tell it! Mid corner adjustments feel more like I’m in a 250 shifter cart! It just tracks and changes direction beautifully! I do feel a pretty big difference on the street. Some roads are pretty horrible even in tour. Tour now feels like sport did and I can actually take a corner hard in tour now. Sport is pretty stiff, around stock bushings in track mode before, but still more compliant. Sport feels just amazing. Track mode now feels like a race car. I just did two days of autocross. The car slides very smooth and predictably. Much tighter than stock. I was drifting with one hand. I’m in love with the bushings and feel the sacrifice in road comfort is well worth it. But I’ve always been into extreme vehicles. I spent 4 years rain or shine, commuting Bay Area roads, on a ZX10R.

Noise, harsher for sure. I’d say a 20% in all around noise harshess increase. I mostley drive in tour now. But can still drive in sport with no issues. Track is for the track now. I used to drive track all the time on the street.