[racingfast]

I lowered my Z saturday and was told now I need to realign it. What negative camber settings are you guys using on the street and still compete at autocrossing? I ran the threads on the rear bolts to the end and got about 3/4" lower. Was told that this is no good and I need to buy the longer bolts like we did on the C4 cars.
And how are you posting pics on your signatures? I have some from an event I wanna post. Thanks BRIAN

 

[CP]

I've got 10,000 miles on my lowering without alignment. There is NO abnormal tire wear.

 

[ZEEE 06]

Ditto

 

[01ZEE06]

Mine is down 1.5" all around. I thought it wise to get it checked out, and it needed a realighment. Running neg. 1 degree all around. No wear problems in 5,000 miles. Have yet to auto x.
HTH

 

[racingfast]

Thanks for the info guys... did you all use the factory bolts in the rear or did you buy the longer ones? I will say I ran the car on the street tires and it had major understeer; which the tape said you would get if you lowered it too much. But when I put the KUHMOS on, it tracked like on rails, and the acceleration was like I boosted it with nitrous!

 

[c4c5specialist]

Hi there,
Always align the vehicle, any time any supension setting is changed, this included ride height of the vehicle.
Do not take chances, best to all, c4c5

 

[racingfast]

Thanks DOC... what would you recommend for the street and for the track? The tape says up to 2.5 negative in front & 1 in rear. Are the factory bolts ok to run to the tip of the threads? DO you think my understeering could be casued by it being too low? I have seen lots lower! BRIAN

 

[Lawdogg]

Leave at least 2 threads showing above the nut and I wouldn't lower more than the factory bolts allow without changing shocks. As far as aligning after lowering, I have lowered all 3 C5s I've and the only--ONLY alignment change is some additional neg. camber which is generally what you want. For a street going autox car, I wouldn't do over -1.5 degree front and -1.0 degrees rear.

 

[racingfast]

thanks Z06 addict. Would I have that understeer if it was too negative? How far did you run the pogo stick onthe front spring?

 

[Lawdogg]

I did not run the front bolts all the way down. I left a little, maybe 15% from the bottom so that I maintain adequate suspension travel for the road courses I run. As far as understeer, if your car is pushing, it probably needs a little more neg. camber in the front. Of course, they all understeer in slow autox type situations. On a road course, they should feel pretty neutral.

 

[racingfast]

Addict..I would agree that they all understeer on street tires cept that there was another Z06 there-not lowered, and driven by a guy with less experience. I felt I should've beat him yet his times were .5 sec faster. I attributed that to my understeering condition. When I put the kuhmos on I knocked off 3 secs with no understeer. Guess I am asking if I am a bit too low- on the front bolts, how much thread is sticking out; or how close to the spring is the bumper? I have the 2 threads or so in the rear now. thanks!~ brian

 

[Lawdogg]

Racingfast, what tire pressure did you have in the front when the car was pushing? I run about 30 psi cold when low speed autoxing and about 37 psi cold for high speed road courses on the stock Eagle F1 SCs.

 

[racingfast]

Addict... I was at 34 all around. I had no clue as to pressures with those tires. And I only got 3 runs so I couldnt change pressure that much as thunderstorms were a comin in. I wanted to swap over to the Kuhmos and got 3 more runs in and then I was changing back to the streets in a thundershower!