[Badmojo]

Camaro ZL1 1LE front 390mm rotor weight comparison. I will put out a video next week on the Racing for ALS Youtube. I'm going to DBA for this season, but was surprised that they are heavier than the factory rotors. Rotor thickness was 35.8 to 36 mm for all three disc.


Edit: Added Video



Edit: Added Pricing
Fronts
Griodisc with Hats $1200 - KNS Brakes

Girodisc Rings with Hardware $850 - KNS Brakes

Factory GM complete $826 -RockAuto.com

DBA Rings with Hardware Kit (reuse OEM hats) $740 - KNS Brakes

[Badmojo]

Some additional info:

1. The rotors all have the same approximate thickness (flat to flat).
2. The Girodisc has a 235 mm diameter center hat. The stock and DBA are 215 mm in diameter. The Girodisc requires a smaller pad since the pad-to-rotor contact area shrinks from ~80 mm to ~65mm.
3. The Girodisc rotor "face" thickness is approximately 1.5 mm thinner per side.
4. The DBA rotor has thicker vanes than the factory rotor and similar dimensions.

[That1guy_tim]

are the DBA's cheaper than factory?

[khcoaching]

The Giros are a bigger upgrade than just the weight advantage. Brake feel is better and stopping power is better. I’ve had them on 4 cars and every single one has been an improvement.

Ken.

[wakespeak]

Unsprung weight is a big deal, multiplier affect. I wouldn't write it off.

[Badmojo]

Originally Posted by khcoaching

The Giros are a bigger upgrade than just the weight advantage. Brake feel is better and stopping power is better. I’ve had them on 4 cars and every single one has been an improvement.

Ken.

Ken,

How do you explain the brake feel and stopping power advantage? Did you have different pads or brake fluid?

I'm curious.

[Badmojo]

Originally Posted by That1guy_tim

are the DBA's cheaper than factory?

A set of DBA rings and hardware kit is about $50 cheaper than factory full replacements at this point in time.

[GunMetalGrey]

I’m not sure why nobody ever lists the Racing Brake ZL1/ZLE OEM sized rotor as an option, it has veined cooling like the Gyro disk, but is larger to better handle the heavier weight and faster speeds of our supercharged cars

[Checkmate1]

Please also post the price for each rotor as well considering us track rats consider these consumables. Price to Value is an absolute consideration.

[Badmojo]

Originally Posted by Checkmate1

Please also post the price for each rotor as well considering us track rats consider these consumables. Price to Value is an absolute consideration.

Fronts
Griodisc with Hats $1200 - KNS Brakes

Girodisc Rings with Hardware $850 - KNS Brakes

Factory GM complete $826 -RockAuto.com

DBA Rings with Hardware Kit (reuse OEM hats) $740 - KNS Brakes

[khcoaching]

Originally Posted by Badmojo

Ken,

How do you explain the brake feel and stopping power advantage? Did you have different pads or brake fluid?

I'm curious.

Great question. Basically the pedal felt firmer and my foot had more "feel" in the top of the pedal stroke, just more connected to the front tires. As far as power, there is more stopping response in the 30-70% brake range. Same results with both Ferodo 3.12s and Cobalt X1s.

Same with my son's GTI and Elantra N.

I used GM DOT 4 on both my Camaros and never an issue.

Ken

[NG329]

Originally Posted by khcoaching

Great question. Basically the pedal felt firmer and my foot had more "feel" in the top of the pedal stroke, just more connected to the front tires. As far as power, there is more stopping response in the 30-70% brake range. Same results with both Ferodo 3.12s and Cobalt X1s.

Same with my son's GTI and Elantra N.

I used GM DOT 4 on both my Camaros and never an issue.

Ken

I wouldn't exactly say that it's "Better" coach. I think it comes down to personal preference. What you're describing is initial bite. Whereas others, may prefer a more progressive feel.

When I tracked motorcycles I preferred immediate lever feel, similar to what you're describing. However, in the car, I actually prefer OEM. I like that the initial bite is less potent as it helps stop me from overbraking and i can trail it to the apex without locking things up.

At my pace (FukkenFast), I honestly don't see Girodisc cutting any more time from my laps. In fact, I should probably be braking less.

Obviously, you're very knowledgable and I respect the hell out of you. However, I just can't wrap my head around anyone wanting to change out the OEM ZL1-1LE brakes (aside from the fluid) unless they're racing at Pro level for hour-long races.

[khcoaching]

Originally Posted by NG329

I wouldn't exactly say that it's "Better" coach. I think it comes down to personal preference. What you're describing is initial bite. Whereas others, may prefer a more progressive feel.

When I tracked motorcycles I preferred immediate lever feel, similar to what you're describing. However, in the car, I actually prefer OEM. I like that the initial bite is less potent as it helps stop me from overbraking and i can trail it to the apex without locking things up.

At my pace (FukkenFast), I honestly don't see Girodisc cutting any more time from my laps. In fact, I should probably be braking less.

Obviously, you're very knowledgable and I respect the hell out of you. However, I just can't wrap my head around anyone wanting to change out the OEM ZL1-1LE brakes (aside from the fluid) unless they're racing at Pro level for hour-long races.

Totally fair and your perspective is great. My perspective is having a car I can take anywhere and have it perform to the level I want, regardless of the track. Having driven stock ZLEs at pace, the stock pads simply don't cut it at hard braking tracks. EX - At Nelson Ledges, the brakes are barely used and stock pads would probably be fine, at The Ridge or say PITT, there is a lot of brake used and stock pads would not perform as well. I, as a driver, want to be able to adjust my braking to any track in any conditions and the Giro setup is just that much better for me with its enhanced feel and power.

Ken

[BoilerUP]

370mm DBA front rotor rings for the SS 1LE are $290 each right know through KNS, with hardware priced at $41 per side. Kinda hard to beat that for consumable costs.