Rear BBK anyone?

disturbed1

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thought id share what i discovered rather then keep a secret...

evo brembo calipers + sti rear rotors = instant rear bbk (no brakets required)

that is all
 

disturbed1

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evo 8.

05+ sti rotors..

u will need to open out the bore on the sti rotor from 58 to 60mm. (may also need a washer to adjust the offset)
 

Nick M

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Don't forget your combination valve for rear pressure after you change how it works.
 

disturbed1

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in simple turms, make the hole in the centre of the rotor 2mm bigger so that it registers on the hub.

correct stock hb compatible

will need to remove dust shield and perhaps run a small spacer behind the rotor to get offset spot on..

will post pics tomorrow once my rotors get bored out that 2mm...
 

gats

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Nice work :)

I know only some STI's have a 5x114.3 PCD (US models IIRC?), how easy is it to track down those rotors???
 

Nick M

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Whats the deal with the combination valve for rear pressure, what would need to be done to it?
With our without ABS? I jumped the gun on that one.

All cars have valves that put a small amount of brake fluid to the rear first to prevent lock up. Then the front is added. It is probably integraded on the ABS cars and many Turbo models have ABS.
 

Enraged

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from our vendor Rockauto, here is some quick prices for reference:

RAYBESTOS Part # 980355 Rotor Rear; WRX STi CAD$36.03
CENTRIC Part # 14246532 Loaded Caliper Rear Left CAD$197.59 (that's with core)

so around $470 (before using any vendor codes) for upgraded rears, then add in any mods/machining of the rotor required.
 

te72

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thats easy, thanks for the info! off to the junk yard tommorow to price them out
I know that we're talking about Mitsubishi parts here, but how many Evos do you see in junkyards? :p

could u explain "opening up the bore" to a noob pls?..:)
Know any machinists? Best way to go about doing something like this. Basically you're just grinding away material from the center of the mounting surface, as the bore of the rotor and the bore of the hub need to match. Same idea with wheels, if your center bore is bigger on your hub than on your wheel, you're going to have headaches getting that wheel to fit...

On the original subject, awesome info man! Might not be as light as some of the aftermarket applications, but still... can't beat the price, would just need to get a proportioning valve to get the balance right, correct?
 

gwumpkus

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I know that we're talking about Mitsubishi parts here, but how many Evos do you see in junkyards? :p


Know any machinists? Best way to go about doing something like this. Basically you're just grinding away material from the center of the mounting surface, as the bore of the rotor and the bore of the hub need to match. Same idea with wheels, if your center bore is bigger on your hub than on your wheel, you're going to have headaches getting that wheel to fit...

On the original subject, awesome info man! Might not be as light as some of the aftermarket applications, but still... can't beat the price, would just need to get a proportioning valve to get the balance right, correct?
thanx for explaining this! i thought this was what it meant, but wasnt sure... thought this mod was plug and play!..:).. guess not.. but even then, with a little machining work, its not that hard after all..:)..
 
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Poodles

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Get a well written article on how to do it, part numbers/which car and pics and we might make it an article :)
 

BigKO

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I am sure that they will be better, but I am curious as to how much more powerful they will be than the stock supra calipers because the evo 8 rears are also single piston correct? I am not doubting simply wondering how much more powerful.
 

IJ.

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I am sure that they will be better, but I am curious as to how much more powerful they will be than the stock supra calipers because the evo 8 rears are also single piston correct? I am not doubting simply wondering how much more powerful.
Could always buy an aftermarket 4 piston caliper designed to fit the EVO and use that ;)


----------

Well done Chris brilliant find!
 

disturbed1

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unfortunately havent been home long enough to fit them up properly so cant write an step by step process yet.

so far all ive done was get the bore machine dout 2mm on the rotors (i went with late model 5x114.3 pcd 316x20mm brembo cross drilled to match my cross drilled brembo fronts).

the earlier 5x100 pcd rotor may be a better option... i dont know

only remote issue is the dust shield. not sure how much will need to be hacked off it to make fit. an alternative option is perhaps just machining 3mm of the back of the handbrake drum on the rotor...

all in all about as easy as an upgrade as possible..; prob not worth your while unless you got upgraded front brakes to match..

all up i paid 250 for calipers and 450 for rotors, rest of work gettign them to fit is basically free... (may cost you someon eelse 50 in machining)




 

disturbed1

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dont think you can still get them. retailed for 3.5k usd or somethign so prob wouldnt have wanted to buy one anyway.

i can easily reproduce brackets to suit 332 or 355mm f40 kits. there are so many different hat offset configs thats its not worth pumping any out unless people where happy to run a 1 piece rotor..

if there was interest in a one piece 355 kit, could look at getting a few sets of brackets made.
 

disturbed1

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just installed my rear brakes then..

here is the part list along with what needs to be done..

evo v-viii brembo caliper (red ones however i think they all te same anyway)
latemodel sti rear rotors (316x20 with 114.3 pcd)
4x 2mm washers
tin snips

how to fit them....

1.pay someone to bore out the sti hub from 58 to 60.1mm
2. cut off dust shield with tin snips
3. bolt kit on using washers to space the caliper closer to the outside of the wheel
 

te72

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dont think you can still get them. retailed for 3.5k usd or somethign so prob wouldnt have wanted to buy one anyway.

i can easily reproduce brackets to suit 332 or 355mm f40 kits. there are so many different hat offset configs thats its not worth pumping any out unless people where happy to run a 1 piece rotor..

if there was interest in a one piece 355 kit, could look at getting a few sets of brackets made.
Are you referring to the Ferarri? I always thought those were center lug cars...
 

disturbed1

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f40 just refers to the style of caliper and the piston diameters. f50s are identical to f40s in appearance but have tiny bit bigger pistons





heres pics of my brake setups

Track supra:

front - stoptech 355mm two piece rotors + f50 calipers +custom brackets my dad made (he is a machinist)
rear - 315x1" pfc rotors (nascar spec) + lotus ap racing calipers + custom brackets and hats





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daily soarer (soon to get parted out and all the goodies put on my daily supra)

front - stillen bbk. 332x32mm brembo cross drilled rotor +f40 calipers
rear - setup posted in this thread


 

joel903

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Interesting.

So getting back on subject about the EVO 8 rear calipers. The mounting holes on the caliper fits right onto the MK3 rear mounting holes? No special bracket required?

Also with the new rotor and EVO 8 caliper does the braking surface have any run offs? Or everything is lined up correctly with the additional parts you mentioned?
 

hvyman

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Damn those are some nice brake setups.