TTurboPimp

iTrader: (12)

I know this has been asked a zillion times, and I did a search before asking this question. How much room do I need to measure for to see if the Supra TT calipers will fit behind my HRE's? When searching I found mixed information, some said 2" from the ROTOR to the inside edge of the spokes of the wheel, some said 2" from the stock CALIPER to the inside edge of the spokes of the wheel. Can someon please clarify this before I drop 800 bucks on brakes that wont fit.

rominl

iTrader: (4)

i thought 540 are high disk application already? i know for sure 540r is, so i think the 540 shoudl be as well?

DaveGS4

iTrader: (2)

TTP - easiest way to be 100% sure is to find somebody local with the brake upgrade and slip your wheel on it.

TTurboPimp

iTrader: (12)

rominl, Im not sure if they are or not. I called HRE to ask them, they werent sure either. They have every freakin spec of the wheel etched into the back of the face. except that! It seems like I have alot of room between the stock caliper and the wheel now, but I want to be sure before I spend the cash, cause my HRE's aint going nowhere!

I just saw the post on the GB that Steve has going for the new big brake kit, Rotora. It seems to me that these give more room than the Supra TT calipers, since they only need a 5 mm spacer for the stock rims. If they fit my HRE's then I think Im going to try them out.

DaveGS4. good idea, I'll have to keep my eye on the local guys to see if anyone has them.

Thanks guys

rominl

iTrader: (4)

good point TTurboPimp. put it this way. my av3, it cleared the rmm brakes no problem, so it clears the supra tt just fine. and my ap racing clears no problem now as well. so that means if your wheels clear the ap racing 6 pistons, there is a very high chance it will clear supra tt brakes as well. i believe i still have like maybe 1 to 2mm between my calipers and the spokes now. you think hrewheels will have info on the ap racing brakes? hope this helps a bit

oh and yeah, i am pretty sure the rotora will fit. though i am still a bit conservative about it until somehow has some solid results about their power, performance, and long term reliability. just my 2 cents

Guru

If you have a good fabricator nearby, you can use the LS400/430 calipers. they are same size but alluminum (MUCH lighter) and use the same Supra rotor. Have to make a custom bracket though. They give you much more clearance for the wheel than the Supra caliper. They are rumored to fit the stock GS400 wheel. I wlll know pretty soon.

bravo261

iTrader: (1)

i asked bananaGS awhile back and he said its about 2.75" from stock rotor to the inside of the spokes.

testing the actual wheel is the best way, but kinda hard unless you got a good friend. i have a guy here that has the TT brakes, we've met and eaten a few times, but i'm reluctant to ask him to yank his car in the air so i could pop on a wheel

JacobT

Just did the measurement for you. You need ar least 2.5" from the rotor surface to the edge of spokes to clear the SupraTT calipers. If you have offset less than +37, there's a very good chance it will fit.

DaveGS4

iTrader: (2)

A lot depends on the design of the wheel spokes as well. My Piaa's are high disk +37 and they still don't fit w/o a very small spacer .

TTurboPimp

iTrader: (12)

JacobT,
I appreciate the measurements, is there any way that you could get me an exact measurement. The reason I say that is I did a quick measurement from the rotors to the spokes, and it was maybe 1/8th of an inch under 3/4". Thats a little too close for comfort when were talking "at least" 2.5". That would be great if you could do that for me. Im going to order something this week. I need brakes badly.

Thanks


By the way, my wheels are a +37 offset, not sure if they are high disk or not.

Also, whats up with the rear brakes, any upgrades available there(rear Supra brakes maybe), besides rotor replacements?

DaveGS4

iTrader: (2)

For my rears, I upgraded to stainless steel lines and EBC Greenstuff pads plus the drilled/slotted cad plated rotors. Oh, and recently some G2 caliper paint . While certainly not a scientific measurement, my big butt-o-meter certainly feels like the car stops with decent relative balance.

TTurboPimp

iTrader: (12)

I jave been thinking hard the past day about that Rotora pckg Steve has out there at the moment, but the fact that they only come in red or blue annoys me slightly. They are off colors of red and blue also, so if I go with the red, it will be really hard to match the rears with red paint. It might look funny with red in the fornt and black in the back, or red with an off color red in the back.

I do like the idea of aonly needing a 5mil spacer for my stockers in the winter time. Im thinking if they only need a 5 mil spacer for the stocks, they gotta fit my HRE's, in theory at least.

rominl

iTrader: (4)

couple of things. offset has absolutely nothing to do with the caliper clearance. the offset could be very low but the spokes can come flying out and will clear calipers. that's why all wheels state whether it's high disk AND also the offset. moreover, even if it's a high disk wheel it might still not clear all calipers. davegs4 can tell you more on that.

and yes, if the rotora clears the stock wheel + 5mm spacer, it should clear the 540 no problem. i am still leaning towards the fact that the supra tt will fit, but no guarantee. TTurboPimp, how much lip does your front wheel have?

matching the front and rear red if you get rotora shouldn't be that bad. as long as you get bright red for the rear, it should look pretty close imho

on my gs4, i have ss lines, pads, and rotors upgrade for the rear. that's plenty imho

JacobT

It's really hard to do the exact measurement. From inner to outer edge of the caliper, all measurements are different. What did you mean by 1/8th of an inch under 3/4"?

SoCalSC4

TTurboPimp: You need to ask the right guy... me!

I am a good guy to ask because I do all of the R&D for HRE (my title here is "Technical Specialist"), and I have made detailed drawings of many popular cars. I also keep detailed files of most popular brake upgrades- in fact, I have a set of Supra brake calipers in my garage. Fortunately, I took a few measurements before I threw the used rotors in the 'can.

Chances are, your front 20" 540s are "high disk"... we typically build them this way because customers who will coin-up for a set of HREs will typically upgrade their brakes at some point. It's difficult to give a for-sure "yes they will fit" as an off-hand response- since all of our wheels are made to order, sometimes people will ask for special offsets, the deepest possible lip (which would compromise big brake clearance), or unusual widths for fender flares or widebody vehicles.

Can you read me the engraving on the back of the wheel?

The first number will be something like F-24083: this represents a Front wheel, and Work Order #24083.

The second number is more critical, perhaps something like 5H20P377015: this tells me the style , diameter, offset, and rim components used to construct the wheel. Based on this, I can give you an accurate answer to your question.

BTW, when it comes to measuring caliper overhang, for comparison purposes, I measure the caliper overhang from the wheels' mounting surface (aka "rotor hat" or "brake hat"), not from the rotor surface (where the brake pads touch).

The stock Supra caliper has 1.550" (39mm) of overhang from the rotor hat. The back of our wheel spokes are curved to maximize the amount of allowable brake overhang- if your wheels have a 1.5" outer lip (as I suspect they do), I am 100% certain they will clear the Supra calipers- and the StopTech, Brembo, and Stillen kits, for that matter.

Feel free to post here (I will check back), or e-mail me at bobh@hrewheels.com

Best regards,

Bob Hale
Technical Specialist
HRE Performance Wheels