[TJay74]

Originally Posted by Sven59

Aero starts to be effective at 60MPH, so I think that will affect most drivers especially if they do any kind of racing.

So you are telling me, that at 60mph the ZL1 will be an undriveable vehicle without the factory spoiler???

Come on, please tell me you don't really think this. 1st off, there is absolutely no way at 60mph there is enough airflow going over or around the spoiler to impact or change the handling dynamics enough at all.

Sorry, I am not buying it. If I was to use that mind set then what keeps a regular Viper on the road while the ACR Viper has their functional wing on it??? My buddy driver both of his Vipers on the road equally without issues, one with a fully race functional spoiler and one without and both make it down the highway at over 60mph and back home without issues.

[Glen e]

Originally Posted by TJay74

So you are telling me, that at 60mph the ZL1 will be an undriveable vehicle without the factory spoiler???

Come on, please tell me you don't really think this. 1st off, there is absolutely no way at 60mph there is enough airflow going over or around the spoiler to impact or change the handling dynamics enough at all.

Sorry, I am not buying it. If I was to use that mind set then what keeps a regular Viper on the road while the ACR Viper has their functional wing on it??? My buddy driver both of his Vipers on the road equally without issues, one with a fully race functional spoiler and one without and both make it down the highway at over 60mph and back home without issues.

I can tell you this: at the annual corvette gathering in bowling green two years ago, they had all the engineers on the panel for q and a. On the subject of spoilers and splitters, all the panel guys said all the aero adds/deletes did not affect anything under 125 mph......mod the car like you want......too many are drinking the "engineering kook aid", as far as I'm concerned...

..

[Sven59]

Originally Posted by TJay74

So you are telling me, that at 60mph the ZL1 will be an undriveable vehicle without the factory spoiler???

Come on, please tell me you don't really think this. 1st off, there is absolutely no way at 60mph there is enough airflow going over or around the spoiler to impact or change the handling dynamics enough at all.

Sorry, I am not buying it. If I was to use that mind set then what keeps a regular Viper on the road while the ACR Viper has their functional wing on it??? My buddy driver both of his Vipers on the road equally without issues, one with a fully race functional spoiler and one without and both make it down the highway at over 60mph and back home without issues.

Originally Posted by Mr. Wyndham
Pulled from Hot Rod's ZL1 review:

A.) "The rear wing is unique to ZL1, and was designed to work in tandem with the front splitter to reduce lift. By about 60mph the body’s lift is countered for neutral handling."

B.) "The positioning of the end plate of the wing spoiler in relation to the quarter panel was critical. It added significant downforce while only adding .001 to the coefficient of drag."

There are several conversations where folks post about modifying spoilers, and aero, etc for looks. Some people chime in and say that aero will be affected.

They seem to get push-back by some claiming that nobody will notice, or the aero kits don't do anything if you're going less than 130mph.

Guess again.

[Sven59]

Originally Posted by TJay74

So you are telling me, that at 60mph the ZL1 will be an undriveable vehicle without the factory spoiler???

Come on, please tell me you don't really think this. 1st off, there is absolutely no way at 60mph there is enough airflow going over or around the spoiler to impact or change the handling dynamics enough at all.

Sorry, I am not buying it. If I was to use that mind set then what keeps a regular Viper on the road while the ACR Viper has their functional wing on it??? My buddy driver both of his Vipers on the road equally without issues, one with a fully race functional spoiler and one without and both make it down the highway at over 60mph and back home without issues.

Not sure where I said undriveable, I said it starts to effect. You can do whatever you want with your car.

[Realist]

I would like to see real world stats that truly compare a stock ZL1 to a stock ZL1 with 1LE spoiler style that fits perfectly. Downforce at speeds, top speed, track laps, 0-100, 1/4 mile, 1mile, etc. Will the ZL1 slow to 1LE numbers in performance? I don't think so.

Just as I'm willing to suffer a possible performance drop going with an m6 over an A10. I'm willing to suffer a performance drop with a different rear spoiler that suits my style. If I go to the ring, I could purchase the track spoiler. I like factory parts so I would prefer GM offer something else, either way not going to stop me from a ZL1 purchase someday.

But I'm gonna need an additional $300 off the purchase price to cover the cost of an aftermarket spoiler and painting it

[thefirstcause]

If I were buying a ZL1, my first mod would be the spoiler to a ACS or the Z28 from Anderson Composites. Afterwards it would be the rims to the 1LE rims. They look more aggressive and badass to me in comparison to the spoke heavy ZL1 rims. That said the ZL1 rims did grow on my after seeing in person, BUT those 1LE's fit the car better.

[Mr. Wyndham]

The spoiler WILL affect aero of this car. In as soon as about 60mph. There is no disputing this...the fact is these things aren't designed just for looks anymore.

The question is at what speeds will it matter? And to what degree?

Will you notice unless you're pushing it around corners at 60mph+, or running down a straight at 150? Probably not...

[67Builder]

Originally Posted by Realist

I would like to see real world stats that truly compare a stock ZL1 to a stock ZL1 with 1LE spoiler style that fits perfectly. Downforce at speeds, top speed, track laps, 0-100, 1/4 mile, 1mile, etc. Will the ZL1 slow to 1LE numbers in performance? I don't think so.

Just as I'm willing to suffer a possible performance drop going with an m6 over an A10. I'm willing to suffer a performance drop with a different rear spoiler that suits my style. If I go to the ring, I could purchase the track spoiler. I like factory parts so I would prefer GM offer something else, either way not going to stop me from a ZL1 purchase someday.

But I'm gonna need an additional $300 off the purchase price to cover the cost of an aftermarket spoiler and painting it

Sounds like my praying that someone takes an otherwise stock 1LE (or ZL1 for that matter) and throws 20k worth of carbon fiber wheels/tires at it to see how much faster it can lap a track. Ala GT350r.
I know Ford had to do quite a bit of suspension work to optimize the carbon fiber wheels (spring rates, mag ride changes....), but I'd love to know just how much of a difference in lap time those super light wheels make.
I might start a go fund me page to start taking donations. Come on everyone. Kick in 5 bucks! It's for science.

[Squatch]

I still have my doubts this wing on the '17 ZL1 does anything at any speed, (I never believe a magazine either, they just market stuff) its just too low to the car, and its in the turbulent air from the downslope of the rear window. Looking at the wing on the GT4, that is a truly functional appliance, (although bit exaggerated for a DD car), its in clean unmolested air.
Just my 2 cents, Ill leave the stock wing on the car when I buy one in 2019, but might change it to a black or carbon fiber one for looks.

[Mr. Wyndham]

Originally Posted by Squatch

I still have my doubts this wing on the '17 ZL1 does anything at any speed, (I never believe a magazine either, they just market stuff) its just too low to the car, and its in the turbulent air from the downslope of the rear window. Looking at the wing on the GT4, that is a truly functional appliance, (although bit exaggerated for a DD car), its in clean unmolested air.
Just my 2 cents, Ill leave the stock wing on the car when I buy one in 2019, but might change it to a black or carbon fiber one for looks.

[TJay74]

Originally Posted by Mr. Wyndham

The spoiler WILL affect aero of this car. In as soon as about 60mph. There is no disputing this...the fact is these things aren't designed just for looks anymore.

The question is at what speeds will it matter? And to what degree?

Will you notice unless you're pushing it around corners at 60mph+, or running down a straight at 150? Probably not...

Says who, did a GM engineer from the Alpha project actually say this? I have dealt with the head engineer over the 2014+ GM truck line now for the last 3 years, if it wasn't for the fact I would feel out of line I would ask him to forward my info over to the chief engineer over the Camaro team just to pose this very question.

That article was from Hot Rod, not from GM. Until a reputable GM source comes out to say that "XYZ is going to happen if ABC is done" then I am going to take a magazine article with a grain of salt.

Otherwise what is keeping all of the I4 / V6 Camaro's on the road and stable when they get over 60mph???

[Sven59]

Originally Posted by TJay74

Says who, did a GM engineer from the Alpha project actually say this? I have dealt with the head engineer over the 2014+ GM truck line now for the last 3 years, if it wasn't for the fact I would feel out of line I would ask him to forward my info over to the chief engineer over the Camaro team just to pose this very question.

That article was from Hot Rod, not from GM. Until a reputable GM source comes out to say that "XYZ is going to happen if ABC is done" then I am going to take a magazine article with a grain of salt.

Otherwise what is keeping all of the I4 / V6 Camaro's on the road and stable when they get over 60mph???

Implementing grain of salt.

[BreedsAS]

If you don't like the spoiler, change it. Forget all this engineering downforce stuff. It is not like you're going to be racing it daily. For the most part, it is going to be going 70 down the highway, 40 in the city, like every other car on the road, with an occasional quick acceleration here and there.
Nobody on this board paid for your ZL1, neither did GM give it to you for free, so YOU get to decide what YOU want to do to it with YOUR money!
Simple as that.

[Sven59]

Originally Posted by BreedsAS

If you don't like the spoiler, change it. Forget all this engineering downforce stuff. It is not like you're going to be racing it daily. For the most part, it is going to be going 70 down the highway, 40 in the city, like every other car on the road, with an occasional quick acceleration here and there.
Nobody on this board paid for your ZL1, neither did GM give it to you for free, so YOU get to decide what YOU want to do to it with YOUR money!
Simple as that.

I don't think anyone cares what you do with your car. The intent is to let people know that the parts aren't only for looks, this is actually a performance car.