budget big brake kit finished

hIGGI · 06-12-2008, 09:24 AM

Ok, here it is

Last year (or even sometime before, who knows

) i have got Brembo 4 piston calipers from some old BMW (740 or so?). Same or very similar calipers which are on GTR, SentraR, 350Z, WRX STI or who knows what other cars...... 40 and 44mm piston size, aluminium calipers.

Got them basically for free.
I started searching for some cheap brake rotors and ended up using BMW X5 rotors 330x30mm. Had to drill new holes for 114x,3 bolt pattern, but that was basically all.

Adapters for fitting calipers were made by friend, steel and heavy, but it works....

Size of pistons in calipers does matter and pedal feel went shit. Time to upgrade to S5 TII brake booster and mazda 929 master cylinder. That fixed pedal feel a lot, removing brake balance valve put more pressure into rear brakes and car was ok to drive, but you could feel front is still too big compared to stock rear.

This year, i got for free Mustang rear rotors, which are our bolt pattern and size 300x20mm. Making adapter for moving out stock caliper was all it needed and today i finally got it all mounted on the car, works without any problems so far, few trackdays will prove it soon

Pictures of front :

http://rx7cz.net/photos/workshop151/
http://rx7cz.net/photos/workshop153/

Pictures of rear :

http://rx7.cz/gallery/?Qwd=./rearbra...v=thumbs&Qis=M

My5ABaby · 06-12-2008, 09:54 AM

It appears you stock fronts were originally NOT the vented rotors, correct?

Nice job. Keep us updated on how the tracking goes.

hIGGI · 06-12-2008, 10:00 AM

stock was original TII stuff, vented rotors, 4 piston calipers......car is S4 TII

and tracking goes well

Ian · 06-14-2008, 11:57 AM

Nice work Higgi.

Ian

hIGGI · 06-15-2008, 12:08 PM

update :

stock S4 TII 16" wheels fit in rear even with this 'big brake update'
stock spare wheel wont fit directly, but does fit with 20mm spacer which i happen to have laying around and could carry it with spare wheel......

My5ABaby · 06-16-2008, 06:21 AM

Would the 86 Sport (15") rims fit?

hIGGI · 06-16-2008, 10:06 AM

I can try tomorrow, but highly doubt it.

My5ABaby · 06-16-2008, 10:22 AM

Quote:

Originally Posted by hIGGI

I can try tomorrow, but highly doubt it.

Ok.

06-12-2008, 09:24 AM	#1
hIGGI Rotary Fan in Training Join Date: Mar 2008 Location: Czech Republic Posts: 78 Rep Power: 18	budget big brake kit finished Ok, here it is Last year (or even sometime before, who knows ) i have got Brembo 4 piston calipers from some old BMW (740 or so?). Same or very similar calipers which are on GTR, SentraR, 350Z, WRX STI or who knows what other cars...... 40 and 44mm piston size, aluminium calipers. Got them basically for free. I started searching for some cheap brake rotors and ended up using BMW X5 rotors 330x30mm. Had to drill new holes for 114x,3 bolt pattern, but that was basically all. Adapters for fitting calipers were made by friend, steel and heavy, but it works.... Size of pistons in calipers does matter and pedal feel went shit. Time to upgrade to S5 TII brake booster and mazda 929 master cylinder. That fixed pedal feel a lot, removing brake balance valve put more pressure into rear brakes and car was ok to drive, but you could feel front is still too big compared to stock rear. This year, i got for free Mustang rear rotors, which are our bolt pattern and size 300x20mm. Making adapter for moving out stock caliper was all it needed and today i finally got it all mounted on the car, works without any problems so far, few trackdays will prove it soon Pictures of front : http://rx7cz.net/photos/workshop151/ http://rx7cz.net/photos/workshop153/ Pictures of rear : http://rx7.cz/gallery/?Qwd=./rearbra...v=thumbs&Qis=M

06-12-2008, 09:54 AM	#2
My5ABaby Sigh..... Join Date: Feb 2008 Location: Murfreesboro, TN Posts: 2,377 Rep Power: 20	It appears you stock fronts were originally NOT the vented rotors, correct? Nice job. Keep us updated on how the tracking goes. __________________ 1986 Sport: 132k miles, 5A (Sapphire Blue Metallic), Tokico Blues, Racing Beat Springs, Custom LED tailights (only S4 LED tails in the world), SSR Mark II, Racing Beat exhaust, S5 black interior, Rotary Resurrection rebuild at 120k miles Community Service Manual RotorWiki "Imagination costs nothing; we could build square locomotives or fly to Mars" - Felix Wankel Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the "present."

06-16-2008, 06:21 AM	#6
My5ABaby Sigh..... Join Date: Feb 2008 Location: Murfreesboro, TN Posts: 2,377 Rep Power: 20	Would the 86 Sport (15") rims fit? __________________ 1986 Sport: 132k miles, 5A (Sapphire Blue Metallic), Tokico Blues, Racing Beat Springs, Custom LED tailights (only S4 LED tails in the world), SSR Mark II, Racing Beat exhaust, S5 black interior, Rotary Resurrection rebuild at 120k miles Community Service Manual RotorWiki "Imagination costs nothing; we could build square locomotives or fly to Mars" - Felix Wankel Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the "present."

06-12-2008, 10:00 AM	#3
hIGGI Rotary Fan in Training Join Date: Mar 2008 Location: Czech Republic Posts: 78 Rep Power: 18	stock was original TII stuff, vented rotors, 4 piston calipers......car is S4 TII and tracking goes well

06-14-2008, 11:57 AM	#4
Ian REIAN Join Date: Feb 2008 Posts: 112 Rep Power: 18	Nice work Higgi. Ian

06-15-2008, 12:08 PM	#5
hIGGI Rotary Fan in Training Join Date: Mar 2008 Location: Czech Republic Posts: 78 Rep Power: 18	update : stock S4 TII 16" wheels fit in rear even with this 'big brake update' stock spare wheel wont fit directly, but does fit with 20mm spacer which i happen to have laying around and could carry it with spare wheel......

06-16-2008, 10:06 AM	#7
hIGGI Rotary Fan in Training Join Date: Mar 2008 Location: Czech Republic Posts: 78 Rep Power: 18	I can try tomorrow, but highly doubt it.