Lexus IS 500 GSF / RCF Brake upgrade
09-15-23, 07:51 AM
#181
Kits are finally done, we were waiting on brackets to be machined, but they’re inbound to the US now.
Should have mine in hand and installed soon.
The following 3 users liked this post by Pittsy:
09-15-23, 11:18 AM
#184
Can't wait to see the rears.
For the front setup didn't know it'll have brackets. My OEM GSF fronts was direct bolt on.
For the front setup didn't know it'll have brackets. My OEM GSF fronts was direct bolt on.
09-15-23, 01:29 PM
#186
these are the fronts, im waiting on a pic of my actual kit with the rears. This was another members.
both are done, just waiting on pics.
Yeah because it’s not the factory Brembo, an adapter bracket is needed.
OEM RCF/GSF Brembo fronts are exactly this. These aren’t Brembo calipers, so a bracket is needed.
both are done, just waiting on pics.
09-19-23, 08:19 AM
#187
My kit is done and is on the way. Paint matched to my car.
due to Lexus’s inability to supply the EPB actuators, we had to move back to a dual caliper setup, regardless of rotor size.
If you’ve ordered a kit, you should expect to have it very soon.
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09-19-23, 09:04 AM
#189
09-19-23, 09:22 AM
#191
Same boat as cp2. I want to see the installed pictures before I buy the rear kit. I also got the RC/GS F front already.
Wonder if there is an option to paint the EPB caliper black and caliper to the desired color if it looks too crowded?
I'm not going to lie. BBK looks great though. Especially to match the front BBK.
Wonder if there is an option to paint the EPB caliper black and caliper to the desired color if it looks too crowded?
I'm not going to lie. BBK looks great though. Especially to match the front BBK.
09-19-23, 01:47 PM
#193
I don't necessarily think they need it, but my kit will be the first one installed on an IS500.
The way I look at it is this:
Every performance variant of a car comes with bigger calipers, rotors, and pads.
RC to RCF
330i to M3
RX350 to RX500
gs to GSF.
The increase in rotor size gives you more thermal mass. More clamping pressure from a bigger caliper usually isn't necessary, most cars can lock up the brakes with the stock setup, but thats not where the value is in a BBK. The pads on the IS500 are comically small, and all the kinetic energy is transferred to heat energy through that tiny pad.
It's in thermal transfer efficiency and thermal mass.
A lot of companies and OEM's have done the engineering and research already.
Edit: But you’re right, a lot of people install BBK's for the subjective improvement to the aesthetic of the car.
The way I look at it is this:
Every performance variant of a car comes with bigger calipers, rotors, and pads.
RC to RCF
330i to M3
RX350 to RX500
gs to GSF.
The increase in rotor size gives you more thermal mass. More clamping pressure from a bigger caliper usually isn't necessary, most cars can lock up the brakes with the stock setup, but thats not where the value is in a BBK. The pads on the IS500 are comically small, and all the kinetic energy is transferred to heat energy through that tiny pad.
It's in thermal transfer efficiency and thermal mass.
A lot of companies and OEM's have done the engineering and research already.
Edit: But you’re right, a lot of people install BBK's for the subjective improvement to the aesthetic of the car.
09-19-23, 01:55 PM
#194
Thank you for such an informative and helpful post. Does/will the installation of this kit do anything to address or improve the “soft/squishy/long travel” condition of the brake pedal? Or is this more inherently associated with the brake system (booster/cylinder) etc.
09-19-23, 02:34 PM
#195
