Originally Posted by joemg

ohhh, ok, I see what he's saying, he wishes the caliper was big enough that the pads would contact the entire depth of the rotor. It's not that the pad isn't making contact (you can see in my pics that it's completely on the rotor).

I spoke in pretty great detail with XAT about rear setups, the challenge is that there really wasn't a readily available larger rear caliper that mounts up correctly. The beauty of the LS430 calipers is that they're radial-mount (meaning they mount perpendicularly to the rotor). This allowed them to work. And from my caliper research, the LS430 has the largest pistons of any rear lexus setup of that era.

If you really wanted more rear braking power for some reason (again, the front does like 75% of the braking), you could probably go with a wilwood caliper and find a rotor that would fit. But I imagine the price would skyrocket and the gain would be minimal. (Though bigger rotors would sure fill out the wheels nicer. His wheels are bigger than mine and that makes the rotor looks small, lol)

Side note, I just went to that guys insta and that GS400 is sick.
https://www.instagram.com/will_gs400/

Originally Posted by CLass of 1

Thank you to OP for all of your work to help XAT get this right.

I’m wondering if you happen to have the piston sizes for those LS460 calipers? I have an SC400 and am considering pulling the trigger on LS460/ISF fronts and Supra TT/Supra TT rear, but I’m slightly concerned with the master cylinder’s ability to move that fluid efficiently enough, given the increase in braking power I’m proposing here.

I appreciate any advice or opinions you can give me. Thank you much!

Nick

Originally Posted by joemg

4 Piston x 1.7"

The first post in this thread has all the measurements for the available calipers:
https://www.clublexus.com/forums/sc4...ig-brakes.html

Originally Posted by CLass of 1

And I’ve actually read that whole thread. I’m losing it! Thank you for pioneering this dude and delivering all this info.

I’m thinking the ideal setup for me, will be the LS460 fronts with 4 x 1.7” pistons with XAT’s adapter 360mm ISF rotor up front. And for the rear Supra TT calipers with 2 x 1.4” pistons and the standard 324mm rotors.

Basically this will mimic the stock Supra piston sizes exactly but with a larger front rotor. Sounds like a win to me!

Nick

Originally Posted by joemg

no worries, there is a ton of data in that giant thread!

That's a good setup! I found supra calipers were kind of hard to find and expensive, the LS430 rears are pretty cheap/easy to come by (and bigger pistons).

I just updated the first post in that thread with the info for the LS430 rears (its buried later in the thread). The LS430 rear calipers are aluminum monoblocs that are 2 x 1.7" and use the supra TT rotors. (with the XAT rear bracket).

I have the 460 front/430 rear setup on mine and it's one of my favorite mods, the SC430 does not stop like a car that weighs 3800lbs anymore. I couldn't be happier.

Good luck with whatever you choose! Glad I could be of help to the community.

Originally Posted by CLass of 1

Yeah I saw your setup, looks great! I asked XAT about those radial mount adapters for my SC400 and they said it’s a no go. So, I’m really stuck with Supra TT rears. Ironically, the TT fronts are pretty reasonably priced on the reman market now, but the rears are all unavailable remanufactured, so I suppose I will be hunting for deals for a while.

Nick

Originally Posted by CLass of 1

Hey joe just wondering how your paint is holding up on those calipers? I’m about to order a set in remanufactured and just wondered about your prep and products and how the finish looks today compared to when you first did it? The calipers seem like they’re anodized or something so I wanted to maybe use a high temp primer first. I’m looking for the smoothest, “Bremboiest” finish!

Nick