MongoZ06

Car is a 2004 Z06, stock springs, stock sways and the replaced the shocks with the C6Z shocks around the 90k mile mark (car now has over 103k miles).

The problem I'm having is that when I'm coming out of a turn and straightening up the car, the body feels slow to return to that "neutral" position. I guess you could say it feel's slow to "rebound"

On a "S" curve the issue is more noticeable as the car feels more "upset" as you come through and out of the last part of the curve which I'm guessing is due to the slower rate of body movement as the car is finishing out the turn.

I notice this issue on both slicks and street tires.

Nothing appears broken or damaged and I don't see any evidence of the shocks leaking.

What are your thoughts on where and what I should be looking at or to change?

Supercharged111

I'VE heard before that the C6Z shocks aren't a perfect match to the C5, sounds like you're proving that right. Vendors will say anything to sell their goods. Also, weight transfer =/= body movement.

mountainbiker2

Those shocks don't have that much rebound to keep the car tied down. I run my Koni's with much more rebound and in slaloms it's just fine. Seems like something else is going on. Try weaving the car back and forth and see what happens.

froggy47

Replace stock c5z bars. So it won't lean so much to start with.

If that's not enough upgrade springs.

If that's not enough replace bushings.

Moto One

Take a look at your front A-arm bushing, I had a similar problem when the upper A-arm move forward, and the lower move back. This screwed the caster up big time.

Mark.

Tomswheels

Yes something that caused or causes alignment to go off seems most likely to me.

MongoZ06

In terms of steering the car turns without issue and re-centers without issue. The car doesn't "pull" while I'm going around the track and I have not seen any changes in my alignment after any of the track events.

The bushings were replaced with the Pfadt Polys a few years ago and everything still looks pretty good.

C5 Hardtop

Pfadt had quality problems. Check those bushings and any other Pfadt suspension parts.

sperkins

What a ridiculous and useless post. Pfadt doesn't even manufacture their bushing kit. With the exception of the front upper pin/snap ring issue, it's a great kit for the money.

froggy47

0Anthony @ LGMotorsports

I'm surprised no one has asked, but what are your current alignment specs? Caster would certainly make the car feel numb if it doesn't have enough in it.

Everyone seems to jump on the shock thing first, what would make you think it is a shock issue?

SunnydayDILYSI

A few questions to help diagnose.

What are your current alignment stats? A small amount of toe in on your rear wheels should help.

Do you have a camber kit?

If not, have you slid / spun since your last alignment? That will significantly change your alignment settings with stock gear.

What anti-roll bars are you running? If they are stock the car will tend to push a bit.

Do you have stock bushings? They are soft and allow the alignment to shift through a corner. Poly bushings help a lot, but make the car un-streetable (noisy and very stiff).

SunnydayDILYSI

You hit post as I was typing in that exact question!

0Anthony @ LGMotorsports

Exactly...better to inspect for issues than just throw parts at it right off the bat, or assume something is broken.

mountainbiker2

This is why.

The problem I'm having is that when I'm coming out of a turn and trying to straighten up the car the body is slow to return to say that "neutral" position. I guess you could say it feel's slow to "rebound"

MongoZ06

Just to reiterate my previous posts regarding the car:
Car is a 2004 Z06
Stock Sway bars, Stock springs, replaced the stock shocks with C6Z shocks, Pfadt Poly bushings.

Alignment is currently .7 degrees camber on the front, .5 degrees camber on the rear, 0 toe both front and back and 6.5 degrees caster
When I've run slicks I max out the camber at both front and rear but make sure both sides are equal, caster stays at 6.5 degrees and toe has been 0. As mentioned before I still feel this same effect when running slicks.
I check my alignment before and after track events and have not seen any changes so everything seems to be holding fairly well so far

I don't feel any understeer or oversteer until I get the (street) tires a little too hot, everything regarding grip and steering feels pretty good up until that point.

0Anthony @ LGMotorsports

When a driver would tell me the car won't straighten out...to me that is the wheel isn't coming back on center.

If you are saying it is still in a lean over condition....that to me is something different.


Sorry just would have worded it a little differently because it is saying something different to me.

C5 Hardtop

Walk like you talk. Do they need to manufacture something for it to be problematic?

mountainbiker2

I really don't know what the OP is saying at this point. If it's about the steering wheel not going back to center, then that's entirely different then want I thought.

C5 Hardtop

Post back when you find the issue.