ThatDoodle

Is there any other rear 2 piston caliper that is compatible with our SC's besides the TT Supra? I just got some NEW LS400/430 front calipers for 150$ without having to exchange my old ones as cores. Are the LS400/430 rears 2 piston? Ive been searching on the net but no luck. any help is appreciated

mkorsu

Aren't the TT and LS calipers 4 pot??

574-SC300

I believe he is asking about the rears.

StiCk3

iTrader: (5)

im pretty sure they are two piston, but you could run with the single piston rears w/0 a problem.

SupraCoup3

you really have to be careful about upsetting brake bias. So much of the stopping power comes from the front wheels, overly powerful rear brakes can upset the rear of the car during braking.

F1 cars have the ability to modify this bias on the fly, right from the steering wheel... with the SC, no such luck

ThatDoodle

You guys are right. I guess theres no need for the rear upgrade. I dont go that fast anyway. Im still curious to know if the ls400's rear are 2 piston and if anyone has any knowledge of them being a straight bolt on. It would be good info for anyone on the board to find in the search if they're interested in doing it.

ThatDoodle

By the way. i just bought a pair of Ls400 calipers on ebay from this guy for 150. http://cgi.ebay.com/ebaymotors/Front...spagenameZWDVW
He was asking the same price as the auction i just linked but i used the best offer feature and offered 150 and he accepted.

Then i found this site which is even cheaper for the calipers
http://www2.lexpartsonline.com/parts...aliper&dp=true
I already searched for 2000 LS400 brake calipers on that link.

574-SC300

According to that link the rears are only single piston.

ki_soarer

i think the rears are only single piston. however, the link you posted has a core or $40, so the callipers are $109.83 each. you got a good deal.

as for brake bias, if you go from the dinky SC front calipers, to the 4 pot LS ones, i think you should upgrade the rear as well.... what would keep it more ballanced in my opinion. although, i dont have any real pressure specs or anything, but it makes sense to upgrade both or the front will have even more bias....??? right?

MJHSC400

That's a good question I'd like to know about too--

I can say that I have done an upgrade on an Infiniti G20, and went from 258 to 280mm front rotors and calipers from a 95~ ish Maxima, and all effects have been positive. These brakes have actually potentially saved my life on one occasion-- This is only a 2800 lb car though, but it does have 4 wheel disc ABS brakes that work very well, and it's common to see not only this upgrade but the Q45 2 piston front calipers/rotors as well-- with no upgrade to the rears at all-- (they're already in excess of 10" diameter as is)

It's my belief that the rear brakes are only supplemental, and are probably designed from the factory as to not pose the threat of "over braking" and causing a loss of control due to fish-tailing/sliding-- This makes me think that they wont need to be upgraded unless you're driving very high speeds, where a better pad may do better for the rear than anything else--

I'm thinking one may experience some serious benefits from some EBC pads and the LS400 front calipers/rotors with stock rears-- I just haven't tested it, but will soon, I can promise-- I just can't leave well enough alone to a stock vehicle it seems....

BTW-- Those "dinky" SC front calipers are 2 piston, and the rotors are close to 13" aren't they???? That's better than alot of trucks come with in 2006----

These cars are overengineered from the factory to rival $70,000 BMW's and Benz's from the same era, and I would hardly call anything on them "dinky"-- unless you're comparing them to a Porsche 952 Formula car--

dejacky

iTrader: (2)

Aliga was telling me of another clublexus member that had LS400 front brakes with Supra TT rear brakes and his car braked fine with on problems. So, according to this, having 2-pot supra TT rear brakes with LS400 front brakes does not upset the brake bias of the car...

ThatDoodle

[QUOTE=MJHSC400;2399829]I'm thinking one may experience some serious benefits from some EBC pads and the LS400 front calipers/rotors with stock rears[QUOTE]


I tihink thats what im going to do.

KidPandJ

Bias is controlled by a proportioning valve, i don't think it has anything to do with what kind of brakes are on the front or the back. So as long as you leave your proportioning valve alone, i belive that your brake bias would remain the same.

SCoupe

Where is this proportioning valve located and how is it adjusted ? You'd be the first because to my knowledge no one has documented it and if it exists it'd be your exclusive to post on it. Let us know.

vipsoarer

scoupe: its either in the master cyl., in a brake line distribution block or in the abs unit itself depending upon the car. It can be changed by adding a separate proportioning valve that is made for manual-changing or by changing the oriface size of the stock units.