If the Supra rotors are larger than the SC rotors, you still need the braket. The braket is the thing that hold the caliper. Without that, there is no way you can fit the caliper on to the larger rotors.

To take the bolts out, those bolts hold the braket, you need a breaker bar. Its about 12" long. Look at how the caliper attached you'll understand what I am talking about For SC400, I think the torque is 97 lb-ft to tight the bolts. The bolts that hold the caliper, the sliding pins are inside the caliper, to the braket is only about 22 in-lbs. Becareful not to over tighten the brake line to the caliper...

 

I just got a set of rear SC400 calipers from aliga but the numbers are a bit different. Can anyone tell me what the numbers visible on the front top of there sc400 rear calipers are? 16v 43? Just want to make sure before I attempt the install... Please let me know... Thanks guys I appreciate the help...

 

which ones are larger? TT or LS400?

Was thinking about the LS400 brake upgrade, but also considering the TT now..

 

TT brakes are larger by a miniscule tiny amount compared to the ls400 calipers. LS400 calipers are 16 pounds lighter...I'm going with the ls400 calipers myself .

 

TT rotors are 320mm in diameter, LS rotors are 315mm. LS calipers are all aluminum, TT calipers are aluminum front half and cast iron rear half.

 

could it be possible to use LS calipers and TT rotors? and could front LS calipers work with TT rear calipers? just curious srry if i may be thread jacking..

 

Don't think you can jack a five year old thread...

 

Wasn't this thread for the people that wanted to compare sc300 and sc400 braking systems? There are loads of threads comparing the Supra TT's they just need to be found.

In reply to Bryan858, thoose are the numbers on my SC400 Rear calipers. Hope that helps..

To the original topic. Yes the Front and rear rotors calipers are larger on the sc400 than the sc300 and yes it does improve the handling by far. I would say it is a big difference like going from SC400's to LS400's. I'm not saying your sc300 will stop like it has LS400 calipers but the difference stepping up will be about the same. Err, even I just confused myself but bottom line is the SC300 braking system is weak compared to the sc400. I personally think this is a must do upgrade if you have larger wheels not just for performance reasons but for general safety...

 

Thats a new one. What is your sourse for saying that?

 

9 Master Lexus mechanics have told me the SC400 brakes are not more powerful (at least noticeably) than the sc300 brakes. On some model SC400's the brakes were exactly the same. 2 Different shops showed this to me. I'm not going to doubt that on some specific years the brakes might be SLIGHTLY larger, but lets be honest, you will notice a MUCH MUCH bigger differnce by upgrading to LS400 (4 pot calipers) from SC calipers (2 pot calipers) rather than 2-pot to a 2-pot.

Conclusion: upgrading from SC300 brakes to SC400 brakes is a waste since you can upgrade to LS400 brakes for the same price! LS400 brakes are designed to stop a full weight "heavy ***" LS400 car from 150mph to 0mph very quickly. SC300's are lighter cars so they benefit greatly from these aluminum shelled (lighter) and more powerful brakes. Just get some wheels that will fit, and upgrade to LS400 brakes with SS lines .

 

I thought this was b.s., I just did not want to come out and say it...

Agreed

Though I can't see why anyone would do this if they not MKIV TT or n/a-T as the eom's are fully capable, especially with some aftermarket performance brake pads.

 

Haha, I just "downgraded" the brakes on my SC400 daily beater to a set from my SC300! The reason I did this was because the rotors on the SC400 had worn down to the minimum specs (1.2" front, 0.6" rear) - after 258k miles, and these were the original rotors!! So I put brand new TT rotors and calipers on the SC300, and put the brakes I took off the SC300 onto the SC400. The SC300 brakes were a little bit smaller, sure, but I haven't noticed any difference in braking performance. The SC400 does have 17x7 wheels that weigh only 16.4 lbs. apiece. Actually, isn't the stock SC300 a little heavier than the SC400? I've heard that the 2jz weighs about 80 lbs. more than the 1uz, but I don't know the weight differences between the W58 and the auto trans, etc.

 

Car & Driver May 1992 Issue, page 90:

"...the 300's smaller rubber gives up little dry grip and actually stops shorter. All-out stops from 70 mph shrink from the SC400's 185 feet to 175.

Credit goes to the SC300's 3526-pound weight--almost 170 pounds lighter than the SC400, with about one percent less weight on the front tires. The savings come from the 300's less bulky engine and lighter completmentary components. The four-wheel discs, for instance, are down-sized in the front from 11.7 inches to 10.8, at the rear from 12.1 inches to 11.4."

 

Experience... If you do a big brake upgrade you not only increase the # of pots, size of pads, size of calipers but also the diameter of the rotors. If you compare the sc3 vs. sc4 rotors they are larger and the calipers are larger as well atleast on a 92 sc3 5spd. vs 95 sc4.

Yes its true you are better off going with the ls4 or supra tt brakes but I jsut put out another option for thoose that don't have the money to replace all the brake componets plus there rims and tires as well as there spare just to fit everything together...

I now have the HP big brake upgrade kit for the supra on my car which I got for a decent price but i've been having trouble with brake fade on brembo d/s rotors. May be defective calipers and I'll be sending them back to the factory in FL shortly to be checked.

Again its just another option for budget modders or thoose with sticking sc3 calipers looking to upgrade to somthing a bit larger at a very affordible price without the headache of finding 5 rims and tires that will fit..