Har-ray

I'm getting a floatiness or aero lift feeling in the steering when over 120 mph. Is this normal?

Richard Ames

Downforce increases? Our Z51 actually feels better planted at higher speeds over 120.

Rooster OG

What mode are you in? Track or sport will help with that.

Har-ray

Sport

owc6

Which version of the car are you driving? Are all your air dams intact?

I found on the few times I took it that high, it felt like it was being sucked down (firmly planted), not lifted up.

Marcho Polo

I have not noticed this in my 15 Z51, it feels solid all the way to 150 which is the fastest I've gone so far.

How many miles on your car and what model is it? If it feels unstable you may need to have dealer check the alignment.

TBF

My Z-51 has that feel when I am in Touring mode and accelerate up to 110+ cresting a slight hill. Not an issue if in Sport or Track. Check your modes. Oh -- only drive that fast on a sanctioned track day.

Little Red Corvette1

Lower the front end using your ride-height "adjustment" screws. I also added a splitter.

At a one mile race, a spectator told me my front end raised up at the finish line and he proved it with a picture from his cell phone. I lowered the front end about 3/8" and added a splitter (WeaponX). I initially felt the splitter would slow me down. I ran 6 mph faster during the next run and the car was "level". I asked the spectator to take another pic.

cwing85b

15 Z51. I have no issues what so ever up to 150 in sport mode. Solid as a rock. What model do you have? If it is a base the mode your in won't make much difference in so far as suspension with out MRC.

themonk

If you're on a smooth road, why would it matter what mode you're in, you don't have active aero that is only activated while in certain modes?

Maxie2U

No "floatiness" or aero lift feeling in the steering when over 120 mph. I have a non Z51 and no splitter.

Har-ray

Non-z51 Stingray / 1300 mi. Would track mode make any difference?

JerryU

Although my Z51 "feels" more planted at high speeds, this is real GM data from Tadge:

C7 base = +0.20 Lift Coefficient (+ = LIFT)
Z51 = + 0.03 Lift Coefficient (~Neutral)
Z06 Base2 = -0.03 Lift Coefficient (~Neutral)
Z06 Stage 2 = -0.152 Lift Coefficient (Downforce)
Z06 Stage 3 = -0.279 Lift Coefficient (Downforce)

So if you have the Base C7 you will get some lift.

If you removed the center air dam on a Bse C7 you increased front end lift at speed.

If you want more front end downforce and have a Z51, add a center air dam. It was removed by GM to avoid excess downforce and oversteer at ~150 mph!

You can lower the front end on factory bolts. That will increase front end downforce with any model. See post #8; good info.

Larry/car

Even the base car changes steering response and engine fuel scheduling going from tour to track mode. My 2014 convertible had no tendency to float at speeds up to 120 mph.

Marcho Polo

Like others have said, unless you have magnetic ride I do not believe that track mode will change anything. Without magnetic ride the only thing the dial controls is steering effort, throttle response and exhaust mode if equipped with dual mode exhaust.

With low miles there should not be any issues with wear on any components.

Read the response that gives the various drag coefficient numbers and that explains it all. Base model without magnetic ride can expect some lift at speed where Z51 and others have better downforce and would experience less lift.

The magnetic ride is really great and I personally would not buy a Corvette without it if you ever expect to go fast.

If you feel the lift is excessive and unsafe I would go to the dealer to have it looked at, with the low miles an alignment check would be covered under warranty and they can verify there is nothing wrong up front. But based on the information from the other post about drag numbers it seems what you are experiencing is expected.

AORoads

My take on it is, absent any needed parts being missing/damaged on your car, I'd look into the actual ride height at all four corners---not necessarily automatically "lowering.". And, while doing that check, I might get a corner-weighted balance and alignment. I'd also check (the first and least-expensive thing to do) your cold-condition, tire pressure. It wouldn't surprise me that one or more of the above are out on your car.

Here's an article to read. http://www.superstreetonline.com/how...pecifications/

joemessman

What is the significance of the CE numbers? For example: .20
.20 of what? inches, centimeters, etc. Thanks.

Har-ray

Can I do this or do I need a tech.? Where are these ride-height adjustment screws located? Ty

Har-ray

Tire pressure and alignment are spot-on. It must be the non-z51 lift coefficient listed previously. It feels like I'm living in a Beach Boys
Little Duece Coupe. "If she had a set of wings man, I know she could fly".

Dif

As mentioned, without MSRC, the modes will not change the suspension.
On another note, the Base C7 does not have a rear Sway bar and I would install Front & Rear Z51 Sway Bars.
They will help Stabilize the handling with very little affect on ride quality.
Do a search and you'll see many do this to their Base C7.
$300-#400.00 for the complete setup depending if you do it yourself or have them installed.
I did it when I had a C6 base with MRC and it made a very noticeable improvement in overall handling with less lean and less floating.
Especially under hard acceleration and higher speeds.
Good luck whatever you decide