[Slurpee]

Hello all

Tracked my 2020 ZL1 over the course of the summer, and have fallen in love with tracking. Got 18 inch Apex wheels coming for next season for take off slicks and save on cost of rubber. Track buddies and I have a supplier that sells used slicks that were only used for 1 session by pro's, so very high quality take offs.



Anyways, I was looking to convert to 1LE front aero, but I'm really against cutting into my bumper. I found that the APR front splitter swaps out with the regular ZL1 splitter, so no need to change my grille. Is there a noticeable affect with the canards? Wondering if the longer APR front splitter will compensate for it. I did pick up a used Anderson Composites 1LE wing. Hoping there's no fitment issues, but it was hard to pass up for half the cost. Couldn't justify getting an OEM wing for how much they cost now.


Fully understand that more time behind the wheel is more important than upgrades, but looking long term.

[BanOne]

Thought about doing the slick take offs as well and I will pass on some advice from a couple instructors I have talked to. Be very careful with that, and maybe spend another year getting seat time first. Street tires give you clear warnings when they are about to give up the grip, slicks do not, and unless you are very familiar with your car and its limits the point at which they give up can be a surprise. Sorry to hijack a thread just thought I would pass along the info that was given to me. I turned instead to Michelin PS Cup 2's which you can find on facebook marketplace used and perform very well.

[Russ.G]

I have a 2018 ZL1 that has the 1LE bumper and canards but base ZL1 rear wing. It definitely makes a difference in terms of high speed balance. The car gets looser the faster you go. Is there a noticeable effect? - Yes at 130+.

Having gone down the scrub slick road with a 1998 f-body and 2003 Z06 I would also caution you against doing it especially on a newer car. Cars with highly integrated electronics are very sensitive to tire diameter/width/stagger/compound. You will only make the handling worse with scrubs on something like a ZL1.

[SoCal Smith]

Originally Posted by Slurpee

Hello all

Tracked my 2020 ZL1 over the course of the summer, and have fallen in love with tracking. Got 18 inch Apex wheels coming for next season for take off slicks and save on cost of rubber. Track buddies and I have a supplier that sells used slicks that were only used for 1 session by pro's, so very high quality take offs.



Anyways, I was looking to convert to 1LE front aero, but I'm really against cutting into my bumper. I found that the APR front splitter swaps out with the regular ZL1 splitter, so no need to change my grille. Is there a noticeable affect with the canards? Wondering if the longer APR front splitter will compensate for it. I did pick up a used Anderson Composites 1LE wing. Hoping there's no fitment issues, but it was hard to pass up for half the cost. Couldn't justify getting an OEM wing for how much they cost now.


Fully understand that more time behind the wheel is more important than upgrades, but looking long term.

Getting the APR splitter will be a bigger benefit than the front canards. You are also adding double the rear downforce and the front spitter could help balance that out.

You need to be going around the turns fast enough to make the downforce to then apply it to what you are doing. You will likely be just ripping it down the straights and causing drag with the canards... which is slowing you down overall.

[Stephen12ZL1]

dive planes/canards do have a noticeable effect in high speed braking zones....the front end is noticeably more planted. You can feel the difference as I added them to my '17 ZL1. On street they are useless as speeds aren't high enough to matter.

[Slurpee]

Originally Posted by BanOne

Thought about doing the slick take offs as well and I will pass on some advice from a couple instructors I have talked to. Be very careful with that, and maybe spend another year getting seat time first. Street tires give you clear warnings when they are about to give up the grip, slicks do not, and unless you are very familiar with your car and its limits the point at which they give up can be a surprise. Sorry to hijack a thread just thought I would pass along the info that was given to me. I turned instead to Michelin PS Cup 2's which you can find on facebook marketplace used and perform very well.

I'll keep that in mind, but already pulled the trigger on the 18 inch wheels. I was planning on replacing the fronts for every session until I'm more comfortable with them. That's probably overkill because we're getting the tires that only have 1 heat cycle. Long term, it's hard to beat.

[Slurpee]

Originally Posted by Russ.G

I have a 2018 ZL1 that has the 1LE bumper and canards but base ZL1 rear wing. It definitely makes a difference in terms of high speed balance. The car gets looser the faster you go. Is there a noticeable effect? - Yes at 130+.

Having gone down the scrub slick road with a 1998 f-body and 2003 Z06 I would also caution you against doing it especially on a newer car. Cars with highly integrated electronics are very sensitive to tire diameter/width/stagger/compound. You will only make the handling worse with scrubs on something like a ZL1.

Yeah I've noticed that on high speed turns the rear end feels very loose. I'm looking at upgrading the rear cradle mounts, and it's why I added the 1LE wing. My home track doesn't have a corner at that speed though, highest speed corner is about 80-90, depending on the car. So it seems the canards wouldn't have an affect on that track.


I did a lot of research on that and the conclusion that I saw was the electronics only freak out when you run square set ups. The take off slicks are something like .2 inches off in diameter compared to OEM, and I didn't see any complaints on the electronics. Biggest complaint was taking 2-3 laps to warm up the tires and loosing a lot of your first session.

[Slurpee]

Originally Posted by SoCal Smith

Getting the APR splitter will be a bigger benefit than the front canards. You are also adding double the rear downforce and the front spitter could help balance that out.

You need to be going around the turns fast enough to make the downforce to then apply it to what you are doing. You will likely be just ripping it down the straights and causing drag with the canards... which is slowing you down overall.

Yeah I definitely either need the 1LE splitter or the APR splitter. Front spoiler may be the more accurate term.



Yeah we really don't have that high speed turns at my home track. Highest speed is something like 80-90 MPH depending on car and conditions. Road America would probably see the most benefit from the canards, but I'd only be going there twice a year max.

[Slurpee]

Originally Posted by Stephen12ZL1

dive planes/canards do have a noticeable effect in high speed braking zones....the front end is noticeably more planted. You can feel the difference as I added them to my '17 ZL1. On street they are useless as speeds aren't high enough to matter.

How high speed are we talking about? I'd say we only have 1 turn where that applies. Hit about 110 on the straight and brake to about 80-90 for the turn. But on that turn, the rear end is what feels loose, not the front end. Which is why I got the 1LE wing and looking to upgrade to the solid rear cradle mounts.

[Stephen12ZL1]

Originally Posted by Slurpee

How high speed are we talking about? I'd say we only have 1 turn where that applies. Hit about 110 on the straight and brake to about 80-90 for the turn. But on that turn, the rear end is what feels loose, not the front end. Which is why I got the 1LE wing and looking to upgrade to the solid rear cradle mounts.

back straight at VIR is 158-162mph with a slight left in braking and the front straight is 153-156mph. They probably help in the 100+mph areas but the stability is more obvious where the speeds are fastest.

[Slurpee]

Originally Posted by Stephen12ZL1

back straight at VIR is 158-162mph with a slight left in braking and the front straight is 153-156mph. They probably help in the 100+mph areas but the stability is more obvious where the speeds are fastest.

Good to know. Think I'll start with the APR front air dam / splitter and see what the aero feels like. Don't have to take off the whole bumper or drill holes into it, so it's a reasonable compromise.

[GreenZLE]

I'd like to hear some details from the 1LE engineer team on when the aero becomes effective. Personally, I think it fees like the canards help plant the front end at speeds of 65/70.

[infinitereality]

Originally Posted by Stephen12ZL1

dive planes/canards do have a noticeable effect in high speed braking zones....the front end is noticeably more planted. You can feel the difference as I added them to my '17 ZL1. On street they are useless as speeds aren't high enough to matter.

They're not completely useless, on a regular ZL1 they will decrease fuel mileage by ~1mpg.

[Greg83]

Originally Posted by Slurpee

Yeah I definitely either need the 1LE splitter or the APR splitter. Front spoiler may be the more accurate term.



Yeah we really don't have that high speed turns at my home track. Highest speed is something like 80-90 MPH depending on car and conditions. Road America would probably see the most benefit from the canards, but I'd only be going there twice a year max.

Hi Slurpee, what is your home town track? I’ve never tracked my car but hoping to do a couple track days next year. Any advise would be appreciated. Thanks!