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Camaro Z/28 Forum - Z/28 Specific Topics Discussions related to the 5th gen Camaro Z/28 model

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Old 10-16-2013, 10:16 AM   #1
mkorgan
 
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Z/28 Wheels / Tires on ZL1

If this is posted in the wrong place, please excuse me and/or move to where it belongs .

From my uneducated perspective, the wheel/tire combo on the Z/28 is one of the biggest advantages it has over the ZL1 based on the recent video. I understand weight, multi-matic suspension, and CCB also are huge in the equation as well. BUT, as a ZL1 owner, I don't want to strip my car of the creature comforts, remove the MRC, or put $15K+ into CBB so that leaves me with the wheels/tires which I absolutely love.

Which leads me to this...I know they may stick out a little bit beyond the fenders without the extensions that are on the Z/28, but will they work otherwise? Will they fit over the BREMBO calibers and will I have in well rub on tight turns?
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Old 10-16-2013, 10:35 AM   #2
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They will stick out over 1 inch (20mm/23mm) at all 4 corners...Without the fender flares this will look odd, will mess with your aerodynamics (4 tires sticking out dragging in the wind) and the car will have less ground clearance.

Z/28
19 x 11 ET11
19 x 11.5 ET 26

ZL1
20 x 10 ET23
20 x 11 ET43


Your gearing will be off and your car will also sit lower.

305/30/19 = 26.2 OD
285/35/20 = 27.85 OD
305/35/20 = 28.40 OD

It will sit .825" lower in the front and 1.1" lower in the rear.

Will I be using this set-up for track events? YES!

-Matt
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Old 10-16-2013, 11:44 AM   #3
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thanks matt. I guess that answers that.
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Old 10-21-2013, 06:41 PM   #4
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has anyone seen the fender flares on the z/28 for sale?
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Old 10-21-2013, 06:42 PM   #5
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There will be Aftermarket wheels available I'm sure.
Fitment won't be an issue then.
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Old 10-21-2013, 06:49 PM   #6
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Great answer Matt..
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Old 10-24-2013, 07:45 AM   #7
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Quote:
Originally Posted by Dropspeed View Post
They will stick out over 1 inch (25mm/23mm) at all 4 corners...Without the fender flares this will look odd, will mess with your aerodynamics (4 tires sticking out dragging in the wind) and the car will have less ground clearance.

Z/28
19 x 11 ET11
19 x 11.5 ET 26

ZL1
20 x 10 ET28
20 x 11 ET43


Your gearing will be off and your car will also sit lower.

305/30/19 = 26.2 OD
285/35/20 = 27.85 OD
305/35/20 = 28.40 OD

It will sit .825" lower in the front and 1.1" lower in the rear.

Will I be using this set-up for track events? YES!

-Matt
The ZL1 fronts are 20x10 +23, you are correct about the rears 20x11 +43.

There are pics of the inside barrel I took of mine in the link below.

http://www.camaro5.com/forums/showth...ghlight=offset

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Old 10-24-2013, 09:58 AM   #8
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305 on all corners it dose not stick out as much but the camber in the front was messed with to help with that
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Old 10-28-2013, 12:10 AM   #9
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Has anybody tried fitting a 305 width front tire on these cars? For the ZL1 or 1LE with the 10" wide front wheels, how much room remains inboard once you've maxed out negative camber?
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Old 10-28-2013, 07:45 AM   #10
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Look around in JusticePete's posts - I think 305's are what the Pedders car was running in the Optima events before we heard that's what the Z/28 was going to be getting. I don't think the wheels were as narrow as 10.0 either.

Maybe try the Suspension/chassis/brakes and Camaro Motorsports sections.


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Old 10-28-2013, 08:20 AM   #11
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gearing wont be a big deal,that can be tuned for the speed-o, just have more low end,lol
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Old 11-04-2013, 10:45 AM   #12
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Quote:
Originally Posted by NinoSS View Post
The ZL1 fronts are 20x10 +23, you are correct about the rears 20x11 +43.

There are pics of the inside barrel I took of mine in the link below.

http://www.camaro5.com/forums/showth...ghlight=offset

Corrected...Thanks!
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Old 12-23-2013, 08:51 AM   #13
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Quote:
Originally Posted by mkorgan View Post
If this is posted in the wrong place, please excuse me and/or move to where it belongs .

From my uneducated perspective, the wheel/tire combo on the Z/28 is one of the biggest advantages it has over the ZL1 based on the recent video. I understand weight, multi-matic suspension, and CCB also are huge in the equation as well. BUT, as a ZL1 owner, I don't want to strip my car of the creature comforts, remove the MRC, or put $15K+ into CBB so that leaves me with the wheels/tires which I absolutely love.

Which leads me to this...I know they may stick out a little bit beyond the fenders without the extensions that are on the Z/28, but will they work otherwise? Will they fit over the BREMBO calibers and will I have in well rub on tight turns?
I would think one of the biggest advantages of the Z/28 is it's brakes. The fresh air box is a plus also. Those two things done to a ZL1 would really help close the gap on a race track.
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Old 12-24-2013, 10:13 PM   #14
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I am really thinking of getting a set for my 1LE. The drag is not that important at the low speeds we see at tracks for 95% of time. However the reduction in unsprung rotational mass is NUTS and outweighs the drag issue if you ask me. With 2deg of camber they will tuck in nice.

I will be honest though....., and probably get flamed..... I will still stay 285 or 295 on the tires. 305 is not necessary if you ask me, I rather take some more weight out and not destroy the steering feel in the street.
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Old 12-25-2013, 11:02 AM   #15
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Quote:
Originally Posted by Kevlar382 View Post
I would think one of the biggest advantages of the Z/28 is it's brakes. The fresh air box is a plus also. Those two things done to a ZL1 would really help close the gap on a race track.
The real value of the C-C brakes will come toward the end of a session on a braking-intensive track.

The value of a fresh air box is negligible compared to the difference between DOT R-compound tires and street summer performance rubber.



Quote:
Originally Posted by Mgizzle View Post
I am really thinking of getting a set for my 1LE. The drag is not that important at the low speeds we see at tracks for 95% of time. However the reduction in unsprung rotational mass is NUTS and outweighs the drag issue if you ask me. With 2deg of camber they will tuck in nice.

I will be honest though....., and probably get flamed..... I will still stay 285 or 295 on the tires. 305 is not necessary if you ask me, I rather take some more weight out and not destroy the steering feel in the street.
Took me a second, but I think I see where you're going here . . . those 11.5" rear wheels will likely dictate 295's all around.


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