With all the talk about the bad Roadster brakes and the "custom" rotors, here are some options I have come up with. Owning both a Lotus and a Roadster has allowed a direct comparison of both. The only parts that are the same are the calipers and pads. The Lotus uses the same 288mm rotor front and rear. The Tesla uses 300mm front rotors and 310mm rear. The Tesla caliper mounting ears on the spindles are taller to accept the larger rotors. There are several upgrades for the Lotus, but nothing fits the Roadster without modification. Lotus had a 4 piston front setup on the 2010 Exige Cup260 model, but it wont fit with the taller spindle mounts on the Roadster. They still used the stock 288mm setup on the rear with that upgrade.
For the front I used parts similar to the Sector 111 Lotus 308BBK value kit, but the mounting bracket is machined for the Roadster http://www.sector111.com/parts/performance/brake-bits/308vbbk.cfm It uses Wilwood 4 piston calipers, BP10 pads(other pad compounds are available), and 308 mm EBC USR series slotted rotors. These are straight vented rotors with directional slots. They are much thicker on the wear surfaces, but 1mm narrower. They weight 17.7 lbs. Stock ones are 14 lbs front 15 lbs rear. The venting is from the outer (wheel) side, not from the backside as original. This is probably better since there is no direct venting inside the Roadster wheel well. In the rear you have 3 choices- 1) you can just upgrade the rotors, 2) install mounting brackets and spacers to mount the stock front calipers on the front side, or 3) mount the 4 piston Wilwood units with the set of brackets. Due to the parking brake, the rear caliper is left attached. There is no useable 4 piston caliper that uses a parking brake. Those applications use a internal drum style for the parking brake.
Rough pricing:
$1500 for the front 4 piston Wilwood 308mm setup, +$300 for rear rotors-you will need new rear pads of your choice.
$1850 for the rear 4 piston Wilwood 308mm setup
$650 for the rear rotors and brackets to use the stock front calipers.
Modified AP Racing 2 piece 308mm rotors add about $700 per pair-same front and rear
With the mention of the 3.0 brake changes, I am sure everybody will be waiting until details are released from Tesla. That will give me time to finish testing and adjusting the balance. I have two roadsters so I should be able to do some back to back tests and document the results. As you can probably see from the pictures, the brakes are on a car with no body, so I will have to figure out how much weight to add to make a fair comparison.
Let me know what everybody thinks.
Mike
For the front I used parts similar to the Sector 111 Lotus 308BBK value kit, but the mounting bracket is machined for the Roadster http://www.sector111.com/parts/performance/brake-bits/308vbbk.cfm It uses Wilwood 4 piston calipers, BP10 pads(other pad compounds are available), and 308 mm EBC USR series slotted rotors. These are straight vented rotors with directional slots. They are much thicker on the wear surfaces, but 1mm narrower. They weight 17.7 lbs. Stock ones are 14 lbs front 15 lbs rear. The venting is from the outer (wheel) side, not from the backside as original. This is probably better since there is no direct venting inside the Roadster wheel well. In the rear you have 3 choices- 1) you can just upgrade the rotors, 2) install mounting brackets and spacers to mount the stock front calipers on the front side, or 3) mount the 4 piston Wilwood units with the set of brackets. Due to the parking brake, the rear caliper is left attached. There is no useable 4 piston caliper that uses a parking brake. Those applications use a internal drum style for the parking brake.
Rough pricing:
$1500 for the front 4 piston Wilwood 308mm setup, +$300 for rear rotors-you will need new rear pads of your choice.
$1850 for the rear 4 piston Wilwood 308mm setup
$650 for the rear rotors and brackets to use the stock front calipers.
Modified AP Racing 2 piece 308mm rotors add about $700 per pair-same front and rear
With the mention of the 3.0 brake changes, I am sure everybody will be waiting until details are released from Tesla. That will give me time to finish testing and adjusting the balance. I have two roadsters so I should be able to do some back to back tests and document the results. As you can probably see from the pictures, the brakes are on a car with no body, so I will have to figure out how much weight to add to make a fair comparison.
Let me know what everybody thinks.
Mike