[Blueclyde]

After shooping and considering all options for a track specific wheel/tire setup for my 2018 ZL1, I decided to go with the OEM setup from the 1LE. I think there are a number of ways that I could have gone, as there are good options.

I picked up a set and did a test fit on the driver's side of the car today. For clarity I have a standard ZL1 and am installing the ZLE wheel/tire. I have a few comments and questions and would appreciate some feedback from those that have done this.

Front:

There is a fair amount of wheel poke, more than I was expecting. I know the ZL1 and ZLE share the same fenders and quarters. My car has the stock alignment currently, so some negative camber will change this look. I will probably install some ZL1 Addon lower fender guards though.

As has been well document on here, there is very little clearance between the standard MRC strut mount brace and the wheel. I am leaning toward taking the material off of the strut, since I will be installing camber plates to allow for enough negative camber for these soft tires.

Question: Will I need to dial in some negative camber at the knuckle, along with the what I get from the camber plate? It seems like I will need about -1 from the knuckle and the camber plate allows an extra 2.5 from what I have read. Thoughts and comments welcome.

Question: Who makes the best aftermarket camber plates? I see Vorshlag and Ground Control. I've seen some posts on here from folks using Vorshlag. Would appreciate any feedback from folks using aftermarket camber plates on a standard ZL1. Has anybody had any issues with these aftermarket camber plates? They look pretty sturdy.

Rear:

Same as the front, there is a fair amount of wheel poke. I expect it's no different than a ZLE but it is very different than the OEM ZL1 wheel. Same as the front, will add some lower quarter guards to knock down some of the debris from hitting the rear quarter.

There have been comments on here about the ZLE wheel/tire rubbing through the driver's rear wheel liner as a result of a bulge from a harness behind the skirt. I thoroughly inspected in the area and see the harness behind the wheel skirt and see how it somewhat causes the skirt to buldge out a bit. I would not expect this area of the car to be any different between the standard ZL1 and the ZLE. Can somebody on here confirm that? It just doesn't seem plausable to me that GM would make this part of the car different for cars that get the 1LE package. I see where the ZLE wheel/tire extends deeper into the rear wheel well area but I do not see any difference in clearance in this area. I checked with both the standard and ZLE wheel, and the clearance seems the same. I will need to keep an eye on this area during the first track day. I get that my standard ZL1 has rubber craddle bushings and the ZLE is solid. What am I missing here?

Comments welcome.

[Vigilante375]

Only thing I can comment on is the wiring harness. If you are running any tire other than the stock size tire, just move the wiring harness. It's an easy process and gives you piece of mind that you're not going to have issues.

By the way, did you ever visit this site? They have a very good for on what kind of wheel package to get

https://support.apexraceparts.com/hc...-Fitment-Guide

[sr71bb]

Originally Posted by Blueclyde

After shooping and considering all options for a track specific wheel/tire setup for my 2018 ZL1, I decided to go with the OEM setup from the 1LE. I think there are a number of ways that I could have gone, as there are good options.

I picked up a set and did a test fit on the driver's side of the car today. For clarity I have a standard ZL1 and am installing the ZLE wheel/tire. I have a few comments and questions and would appreciate some feedback from those that have done this.

Front:

There is a fair amount of wheel poke, more than I was expecting. I know the ZL1 and ZLE share the same fenders and quarters. My car has the stock alignment currently, so some negative camber will change this look. I will probably install some ZL1 Addon lower fender guards though.

As has been well document on here, there is very little clearance between the standard MRC strut mount brace and the wheel. I am leaning toward taking the material off of the strut, since I will be installing camber plates to allow for enough negative camber for these soft tires.

Question: Will I need to dial in some negative camber at the knuckle, along with the what I get from the camber plate? It seems like I will need about -1 from the knuckle and the camber plate allows an extra 2.5 from what I have read. Thoughts and comments welcome.

Question: Who makes the best aftermarket camber plates? I see Vorshlag and Ground Control. I've seen some posts on here from folks using Vorshlag. Would appreciate any feedback from folks using aftermarket camber plates on a standard ZL1. Has anybody had any issues with these aftermarket camber plates? They look pretty sturdy.

Rear:

Same as the front, there is a fair amount of wheel poke. I expect it's no different than a ZLE but it is very different than the OEM ZL1 wheel. Same as the front, will add some lower quarter guards to knock down some of the debris from hitting the rear quarter.

There have been comments on here about the ZLE wheel/tire rubbing through the driver's rear wheel liner as a result of a bulge from a harness behind the skirt. I thoroughly inspected in the area and see the harness behind the wheel skirt and see how it somewhat causes the skirt to buldge out a bit. I would not expect this area of the car to be any different between the standard ZL1 and the ZLE. Can somebody on here confirm that? It just doesn't seem plausable to me that GM would make this part of the car different for cars that get the 1LE package. I see where the ZLE wheel/tire extends deeper into the rear wheel well area but I do not see any difference in clearance in this area. I checked with both the standard and ZLE wheel, and the clearance seems the same. I will need to keep an eye on this area during the first track day. I get that my standard ZL1 has rubber craddle bushings and the ZLE is solid. What am I missing here?

Comments welcome.

Well I vouch for VORSHLAG camber plates myself on my SS1LE and I get 3.6 degrees negative camber out of them for the track and I adjust them back in about 10 minutes to -3.1 degrees negative camber for the street. This is a VERY high quality part with a LARGE bearing. The shop that I use for my track adjustments ALSO use VORSHLAG. The owner is holds a couple of national driving championships and he highly recommends them so there you have it. Now on the REAR of the car I was maxing out at about -2.0 degrees negative camber so I has SPL TOE Rods installed and now for both street and road racing I run -2.4 degrees negative camber on the rear.

This allows me to run 18 x 11 APEX EC7 ET27 wheels with Michelin slicks size 30 68 18 with NO TIRE POKE at top of wheel well. I DO run a 5MM spacer on front and I have done the strut bracket grind mod that is well documented.

Now a ZL1 will have a little more fender clearance that my SS 1lE

[Blueclyde]

Originally Posted by sr71bb

Well I vouch for VORSHLAG camber plates myself on my SS1LE and I get 3.6 degrees negative camber out of them for the track and I adjust them back in about 10 minutes to -3.1 degrees negative camber for the street. This is a VERY high quality part with a LARGE bearing. The shop that I use for my track adjustments ALSO use VORSHLAG. The owner is holds a couple of national driving championships and he highly recommends them so there you have it. Now on the REAR of the car I was maxing out at about -2.0 degrees negative camber so I has SPL TOE Rods installed and now for both street and road racing I run -2.4 degrees negative camber on the rear.

This allows me to run 18 x 11 APEX EC7 ET27 wheels with Michelin slicks size 30 68 18 with NO TIRE POKE at top of wheel well. I DO run a 5MM spacer on front and I have done the strut bracket grind mod that is well documented.

Now a ZL1 will have a little more fender clearance that my SS 1lE

Thanks for the feedback. During the first alignement with the camber plates, where did you leave the camber setting at the knuckle? I think the factory camber setting may be -1°. Did you leave that alone and just use the camber plate?

[sr71bb]

Originally Posted by Blueclyde

Thanks for the feedback. During the first alignement with the camber plates, where did you leave the camber setting at the knuckle? I think the factory camber setting may be -1°. Did you leave that alone and just use the camber plate?

YES that was left alone so all the additional camber was done with the plates

[sr71bb]

Originally Posted by Blueclyde

Thanks for the feedback. During the first alignement with the camber plates, where did you leave the camber setting at the knuckle? I think the factory camber setting may be -1°. Did you leave that alone and just use the camber plate?

YES that was left alone so all the additional camber was done with the plates

[Mahdeys]

I run apex direct fit 18x11 and 18x12 with pirelli DHB slicks, size 305 660 and 315 680. I could probably get away with 325 680 for the rear with harness relocation. No rub and handles amazing.

[Camaro1973]

Originally Posted by Blueclyde

After shooping and considering all options for a track specific wheel/tire setup for my 2018 ZL1, I decided to go with the OEM setup from the 1LE. I think there are a number of ways that I could have gone, as there are good options.

I picked up a set and did a test fit on the driver's side of the car today. For clarity I have a standard ZL1 and am installing the ZLE wheel/tire. I have a few comments and questions and would appreciate some feedback from those that have done this.

Front:

There is a fair amount of wheel poke, more than I was expecting. I know the ZL1 and ZLE share the same fenders and quarters. My car has the stock alignment currently, so some negative camber will change this look. I will probably install some ZL1 Addon lower fender guards though.

As has been well document on here, there is very little clearance between the standard MRC strut mount brace and the wheel. I am leaning toward taking the material off of the strut, since I will be installing camber plates to allow for enough negative camber for these soft tires.

Question: Will I need to dial in some negative camber at the knuckle, along with the what I get from the camber plate? It seems like I will need about -1 from the knuckle and the camber plate allows an extra 2.5 from what I have read. Thoughts and comments welcome.

Question: Who makes the best aftermarket camber plates? I see Vorshlag and Ground Control. I've seen some posts on here from folks using Vorshlag. Would appreciate any feedback from folks using aftermarket camber plates on a standard ZL1. Has anybody had any issues with these aftermarket camber plates? They look pretty sturdy.

Rear:

Same as the front, there is a fair amount of wheel poke. I expect it's no different than a ZLE but it is very different than the OEM ZL1 wheel. Same as the front, will add some lower quarter guards to knock down some of the debris from hitting the rear quarter.

There have been comments on here about the ZLE wheel/tire rubbing through the driver's rear wheel liner as a result of a bulge from a harness behind the skirt. I thoroughly inspected in the area and see the harness behind the wheel skirt and see how it somewhat causes the skirt to buldge out a bit. I would not expect this area of the car to be any different between the standard ZL1 and the ZLE. Can somebody on here confirm that? It just doesn't seem plausable to me that GM would make this part of the car different for cars that get the 1LE package. I see where the ZLE wheel/tire extends deeper into the rear wheel well area but I do not see any difference in clearance in this area. I checked with both the standard and ZLE wheel, and the clearance seems the same. I will need to keep an eye on this area during the first track day. I get that my standard ZL1 has rubber craddle bushings and the ZLE is solid. What am I missing here?

Comments welcome.

Your speedo will be off a bit as well. It will read faster then your currently moving.