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I lowered my Z06 (just stock adjustments, no cut bushings, etc) so I figured I should have a 4-wheel alignment done to be safe. They guys at the shop where I had it done let me watch while they did it. These guys have done muffler work for me and seem to know their stuff and do good work. They had a hell of a time getting the fronts within the spec limits, but finally got it done. They used a Hunter machine. While I was watching the screen said "1997-2001 Corvette" specs. Are there different alignment specs for the Z06 vs the non-Z06? Should I be worried that maybe I didn't get the alignment I need? Thanks.
yep the specs are different - you possibly got the wrong ones.
FYI, You can add some camber from the stock Z06 specs and still have good ride and tire wear. -1.25deg front, -.8deg rear will give you good results. Zero toe front, 1/16 toe-in rear. This is the street performance setup - you can do more for tracking.
Here are the values from the printout. Do I need to take it to the dealer and have it redone?
Left Front: Camber -0.3 degrees, Caster 6.3 degrees, Toe .06 degrees
Right Front: Camber -0.2 degrees, Caster 6.4 degrees, Toe .06 degrees
Front Cross Camber -0.1 degree
Front Cross Caster -0.1 degree
Left Rear: Camber -0.2 degrees, Toe .03 degrees
Right Rear: Camber -0.2 degrees, Toe .02 degrees
The specs they set it to will work, but you will not have the full cornering ability of a Z06 with factory specs. The camber factory spec is -.75 on all four corners. You toe in looks fine as does your caster. The specs you have will maximize tire wear, but it is at the expense of some handling.
Rippied, thanks for the response. I don't take my car to the track, so I guess I shouldn't be worried about the loss of handling. Would I notice the difference in handling in everyday driving (of course, now and then I drive the car hard!) or would it only be noticeable on the race track? I'm trying to gauge whether it's worth getting it back in the shop for more work. Again, thanks for the feedback.
Lou
Lou, on the street, I doubt you would notice. The car will track better on the hwy set to the specs you now have. Given your use of the car, I would leave the alignment where it is. :cheers:
I've been driving the car a few weeks since the alignment and for a lack of a better word it feels "twitchy" now! The back end feels jumpy in little bumps under acceleration and I never noticed that before. I know that with this much power the back end will be squirelly if you get on it too much, but this just doesn't feel right. Is it possible that this alignment to non-Z specs has made it act like this or am I just imagining it? :confused:
Did the guys who did the alignment use a torque wrench on the suspension cams after they were done making the adjustments? If not, it's possible that one of the cams moved (likely one of the rears) and your alignment is off. Is your steering wheel still completely centered when you drive in a stright line?
If all appears to be well, maybe you are just more "sensitive" to the feel of your car now that you are specifically feeling for it.
They didn't use a torque wrench, but they cranked it down pretty hard with hand wrenches. The steering wheel is still centered and it doesn't wander or anything. I may still take it to the dealer and have some negative camber put into it front and rear. It just doesn't feel as stable in bumps or in fast cornering.....
In the simpliest of terms, adding camber (up to a point) to the Z06 will give you increased cornering capability at the expense of high speed stability. If your prone to making "mach runs", increasing the camber will make the car "twitchy" at high speed. The set up you indicated should have been more or less ideal for high speed.
C5LOU,I noticed that you used the word "twichie". The Z06 is very sensitive. When alignment is good,this car turns when you think,about turning. In a way,like drag strip alignment. I'll say this though, you could end up liking stock C-5 settings better.
Are the specs the same for an '01 and '02? Thanks for all the feedback guys! I'm going to drive it some more and see how it feels. Maybe I'm driving it harder since I got it aligned, thus the backside dancing some!!!!! :D
Lou,
The Z06 does have different alignment specs than the regular C5. My friend owns a Hunter machine (an older one with the string, not laser). His machine didn't have the specs for the '02 Z06 so he had Hunter upload the new information to his system the day before I had my alignment done. The Z06 is a separate entry in the menu on the alignment machine. Print out the specs posted above and go back to the guy and have it done right. If he doesn't have the newest software, he can dial your car in to the specs you give him. The fact that the car suddenly feels twitchy tells me that you aren't get all the performance out of your car with the current alignment. :crazy: