[Inthepasture]

Hi All,

I am experiencing (since new) an unplanted feeling from the front end around 120mph and above. 0-100 the car is planted like a scared squirrel on the trunk of a pine tree. There are no noises, I have done 2 diff oil changes, transmission A8 oil change, 2 alignments, new tires and a bunch of oil changes. Car has 15 k miles but like I said, this has been happening since new. I have been under the car and checked it a bunch of times for anything.

Thanks.

[oneredry]

Originally Posted by Inthepasture

Hi All,

I am experiencing (since new) an unplanted feeling from the front end around 120mph and above. 0-100 the car is planted like a scared squirrel on the trunk of a pine tree. There are no noises, I have done 2 diff oil changes, transmission A8 oil change, 2 alignments, new tires and a bunch of oil changes. Car has 15 k miles but like I said, this has been happening since new. I have been under the car and checked it a bunch of times for anything.

Thanks.

assuming this was all taken place just south of the boarder, right?

[iarepeyton]

I think all cars get sort of light in the front at high speed. You likely need to add aero parts to increase down force and decrease the air pressure under the car at high speeds. Front splitters and side skirts are designed to do that. I know the exact feeling you're talking about but I've never felt it was a problem, just a result of a lot of air getting under the car.

[GP86]

I believe I've felt the same thing you do and I've determined it's just the need for more aero. I've considered a front chin spoiler/splitter and possibly an upgrade to 1LE suspension sometime in the future, but I have yet to make a move on either of these options. For me, it's about 85-90MPH where things feel like they're starting to be less composed. Definitely above 100MPH I can tell that there's room for improvement. This is on a 2SS with mag ride.

[Rock-It Man]

The last time I drove a car at over 120mph on public roads I was a 17 year old idiot and the car was an 1970 Olds Cutlass. Who knows how fast I was going since the speedo only went to 120?

But at the drag limited speed, there was zero steering feedback. I think the car was close to airborne.

Grow up, dude, while you're still alive.

[kropscamaro16]

100% its the shitty oem goodyear runflats if you are still on them lol trust me

[Chutzpah]

Originally Posted by Rock-It Man

The last time I drove a car at over 120mph on public roads I was a 17 year old idiot and the car was an 1970 Olds Cutlass. Who knows how fast I was going since the speedo only went to 120?

But at the drag limited speed, there was zero steering feedback. I think the car was close to airborne.

Grow up, dude, while you're still alive.

I came across a statistic that was published recently. Don’t quote me on the #’s but the Camaro and Corvette are very high on the list (Camaro is #6) for single person crashes that end in death. I’m not trying to preach in any way here, because I like to have fun too (believe me). I just thought it was interesting since I have a tendency to “play” when driving solo w/no one else within a mile of site. Made me think...

[TheBusDriver]

"So I was doing about a buck-20 on the interstate the other day and the car didn't feel safe."

Bruh.

A functional front splitter and canards will help a bit, but the easiest way to keep air above the car and out from under the car is by lowering the ride height. Science.
Maybe even a little positive rake (rear end slightly higher than the front)

[Inthepasture]

Thanks for the responses. I am going to work on the aero. I like the idea of going to a 19 wheel in the front to increase downforce. I will update the post as I upgrade the car. Thanks again!

[Need4Camaro]

Originally Posted by Inthepasture

Thanks for the responses. I am going to work on the aero. I like the idea of going to a 19 wheel in the front to increase downforce. I will update the post as I upgrade the car. Thanks again!

I dont know if this issue is present in 6th Gens but one thing you need to becareful for if you're staggering Wheel and Tire HEIGHTS (not widths, but HEIGHTS) is it may fool the TCS and ABS system into believing you have either lost traction or are experiencing wheel slip potentially triggering either system even when neither of those conditions are present... this is because the reduced height of the front wheels cause them spin faster than the rear wheels simulating wheel slip conditions.

Btw, CA Highway Patrol is nothing to mess with, I'd avoid doing 120 anywhere on a public road out there.

[kropscamaro16]

Originally Posted by Need4Camaro

I dont know if this issue is present in 6th Gens but one thing you need to becareful for if you're staggering Wheel and Tire HEIGHTS (not widths, but HEIGHTS) is it may fool the TCS and ABS system into believing you have either lost traction or are experiencing wheel slip potentially triggering either system even when neither of those conditions are present... this is because the reduced height of the front wheels cause them spin faster than the rear wheels simulating wheel slip conditions.

Btw, CA Highway Patrol is nothing to mess with, I'd avoid doing 120 anywhere on a public road out there.

haha i did 120 on the 710 my first night i got my car i was just cruising along and then looked down and was like holy shit

[Need4Camaro]

Originally Posted by kropscamaro16

haha i did 120 on the 710 my first night i got my car i was just cruising along and then looked down and was like holy shit

Yea I know, 90 really feels like 55 in these cars....still gatta becareful tho. I already got pulled over for 70 in a 55 which is 15 over and got the "nice cop" ...I wouldnt wanna dream of what he would have did if he clocked me doing 65 MPH over the limit

[Inthepasture]

Originally Posted by TheBusDriver

"So I was doing about a buck-20 on the interstate the other day and the car didn't feel safe."

Bruh.

A functional front splitter and canards will help a bit, but the easiest way to keep air above the car and out from under the car is by lowering the ride height. Science.
Maybe even a little positive rake (rear end slightly higher than the front)

Thanks. Makes sense and science. Get more wind exposure to the hood and this should increase downforce and rock chips.... This is what I am going to do. Lower the front about 1 inch and decrease the tire size by 5mm (radius), add front splitter, stiffer front springs. If that doesn't work.... spool valve damping from 1LE.

[Inthepasture]

Originally Posted by Need4Camaro

I dont know if this issue is present in 6th Gens but one thing you need to becareful for if you're staggering Wheel and Tire HEIGHTS (not widths, but HEIGHTS) is it may fool the TCS and ABS system into believing you have either lost traction or are experiencing wheel slip potentially triggering either system even when neither of those conditions are present... this is because the reduced height of the front wheels cause them spin faster than the rear wheels simulating wheel slip conditions.

Btw, CA Highway Patrol is nothing to mess with, I'd avoid doing 120 anywhere on a public road out there.

Excellent point. I will do more research before I stagger the height. The 2018 ZL1 1LE runs 305F 325R 30/19 which produces front diameter 26.2 and rear 26.7 inches. which yields a 6.35 mm radius difference (1/4 inch). The stock SS set up yields 27.7 front and 27.6 rear. Hmmm. More research. Specs are from https://tiresize.com/calculator/