emptnest

My understanding is that for the C5, the Z51 front spring is identical to the Z06 front spring, even sharing the same part number. That's why I mentioned changing only the rear.

emptnest

Yes it was this past Sat. I remember your car; you passed me at least a couple of times (maybe more, ha ha). Mine is a pewter FRC, with black C4 A mold wheels.

Thanks for your offer. I'll look for you next time I'm there, which will probably be May 18.

duk007

I should be there on the 18th. I remember seeing your car, you were parked off to the side and behind me.

I was probably trying to keep up with that P-Cup car that was setting the track on fire. I can normally keep up with most of those overgrown Volkswagens, but boy was that car quick!

Happy to go with you for a lap or two and listen to your issue. I should also be there on Thursday’s TNiA as long as it doesn’t rain

emptnest

emptnest

Bill Dearborn

An LSD that is shot with worn out clutches and doesn't keep tires from spinning is different than one where the clutches are too tight. When they are too tight you don't get a proper rotational speed difference between the rear wheels when the car turns and the axle starts chattering, bumping and making all sorts of noises almost like it would do if it had a locked diff. The LSD lubricant is supposed to keep that from happening but sometimes it doesn't prevent the problem.

Bill

jschliffka

I was there too in the open wheel group. (Blue Formula Ford with white racing stripes) I was on grid when you came off the track. I saw your car and thought, hmm, 17's all around. Not many people run that setup these days due to tire size availability. Not saying that's your problem, it's just what stood out to me.
I'm not going to be much help since I don't track my C5Z, only autocross. I can say that the only time I've ever wheel hopped was during a launch. Never coming out of turns, even at lower autocross speeds.
The default answer to posts like this is usually to call Sam Strano at stranoparts.com.

emptnest

emptnest

duk007

Sorry I missed that event. I had too much pile up at my company, can’t take the day off when everyone else is working overtime.

I should be at tomorrow’s TNiA . Pitt Race should also have a couple more HPDE’s soon. They are booking tons of events(which is good for the track) but they also understand the need for local grassroots track time as well.

VetteDrmr

I'm a little late to this thread, but I'd definitely go with the '04 Z06 shocks (that's what I've got on my '00 FRC). They're designed especially for the FRC chassis, which the C6 Z06 shock isn't.

And, Garrett is one of the best advisors you can find on this forum; he's helped me immensely!

HTH, and have a good one,
Mike

C6_Racer_X

That's not the same as what is commonly referred to as "wheel hop."

My first suspicion with that is incorrect diff juice or worn clutches in the diff. I'd start with a drain and fill with the AC Delco fluid. The diffs in the vettes are sensitive to fluid and "friction modifiers." The wrong fluid or the wrong mix/blend will cause issues similar to what you describe.

"Wheel hop" feels like the back of the car is falling apart. It's most common from a standing start. On other cars (especially solid axle cars like older F bodies) you can also get a version of wheel hop under braking, but that doesn't usually happen on the vettes with IRS, and it doesn't usually happen with stock or stock(ish) brakes. You have to be really pushing the brake balance more rearward to experience that nightmare. Either way, accelerating or braking, "wheel hop" feels like the car is tearing apart/falling apart. If you've ever experienced it, you won't confuse it with any minor issue.
That's also a possibility.

You dragged me into it late, too. That's OK. At least this isn't a 15 year old zombie thread.