twilightprotege
Member
- :
- 2001 323 Astina SP20 (P5)
great work!!!!!!!
cant wait to see how it goes with the 4 piston calipers
cant wait to see how it goes with the 4 piston calipers
protege5 with rx7 brake upgrade??
- Thread starter twilightprotege
- Start date
flat_black
Member
Hopefully, I'll be able to plaster my face against the steering wheel with the four piston calipers on there when hard-stopping; As it is, the car stops HARD. =) Hehee. Slowly working my way toward the fastest stopping Protege. 
I'm going to try and mount the OE front brakes on the rear, like I had mentioned, as the thicker rotor will EASILY make up for the .1 inch diameter difference. I'll need to get a set of rear calipers from the RX7, too, at that point, as I don't think the rear calipers open enough to allow for the 22mm thick rotors as opposed to the, what, 10mm thick stock rear solid rotor?
I'm going to try and mount the OE front brakes on the rear, like I had mentioned, as the thicker rotor will EASILY make up for the .1 inch diameter difference. I'll need to get a set of rear calipers from the RX7, too, at that point, as I don't think the rear calipers open enough to allow for the 22mm thick rotors as opposed to the, what, 10mm thick stock rear solid rotor?twilightprotege
Member
- :
- 2001 323 Astina SP20 (P5)
changing the front calipers to the rear mightnt work well. it'll be a huge increase in piston size.
the rear rx7 calipers as single piston, dont know what size piston, but are for 22mm thick rotors i think...
the rear rx7 calipers as single piston, dont know what size piston, but are for 22mm thick rotors i think...
flat_black
Member
The front to back would work, but you wouldn't have a handbrake, which is kinda important to me. =) That's why I was thinking about the 7's rear calipers.
As a side note, I went for another ride tonight. To explain better how it feels to brake, now, the pedal return pressure is there right off the bat, and when you push down harder, the pedal doesn't move much at all... It feels rock solid. However, the harder you push, the harder the car stops, and it seems the capacity for stopping quickly is GREATLY increased, but it does, logically, take more pressure to stop at the same rate, but not enough to make it difficult... It's MUCH nicer to modulate for me, especially heel-toing and left foot braking, given that the pedal doesn't move; It just transfers pressure.
As a side note, I went for another ride tonight. To explain better how it feels to brake, now, the pedal return pressure is there right off the bat, and when you push down harder, the pedal doesn't move much at all... It feels rock solid. However, the harder you push, the harder the car stops, and it seems the capacity for stopping quickly is GREATLY increased, but it does, logically, take more pressure to stop at the same rate, but not enough to make it difficult... It's MUCH nicer to modulate for me, especially heel-toing and left foot braking, given that the pedal doesn't move; It just transfers pressure.
flat_black
Member
I just posted a how-to here:
http://www2.msprotege.com/forum/showthread.php?p=1073337#post1073337
Enjoy folks. =)
http://www2.msprotege.com/forum/showthread.php?p=1073337#post1073337
Enjoy folks. =)
twilightprotege
Member
- :
- 2001 323 Astina SP20 (P5)
great write up! will add that to my favourites!
twilightprotege
Member
- :
- 2001 323 Astina SP20 (P5)
did anyone get around to checking this all out? a real lot of us are anxiously waiting
MP3skaterNC
JDM *****.
- :
- slotege mp3
haven't had the time 
twilightprotege
Member
- :
- 2001 323 Astina SP20 (P5)
tis cool - just dont forget about this lil thread :hint: :hint: hehehehe
MP3skaterNC
JDM *****.
- :
- slotege mp3
yeah, im pretty broke right now, and will be leaving for college soon. So its getting doubtful that ill be able to do this right now.
flat_black
Member
I should have no problem at least test fitting the brakes soon, once I get my damn RC7 back from the shop. =P Chris from SPD hasn't gotten back to me about the brakes yet, so I don't have any on the way, but will once he gets in touch with me.
twilightprotege
Member
- :
- 2001 323 Astina SP20 (P5)
just an update - i'm off to see a brake guy thursday next week - will discuss the posibility of an rx7 caliper upgrade and 304mm discs
twilightprotege
Member
- :
- 2001 323 Astina SP20 (P5)
ok, back from the brake place.
man i'm in some damn good company with these guys. 1 guy (the brake distributor) makes cobra replicas when he's not doing brake stuff, 1 guy builds race circuit cars and rally cars, the other...well...used to be an engineer who worked on the brabham/repco formula one cars/engines in the 1970's! yeah i think they know what they are talking about...
anyway, it's definately possible. with the series 5 calipers, the fins on the caliper above the pistons need to be removed, but other than that a pretty easy mod. they think at the moment without taking the wheels off and doing some real testing 294mm rotors on the front will work no worries, 304mm at the moment is a maybe. the main problem is the wheel (since i have the stock P5 16" wheel).
they are going to work out a price for me and get back to me shortly with the price etc. so for now it's buy the calipers, get the fins removed, get the caliper powder coated (i'm going to get it black with the MAZDA in silver or just metal), buy the caliper rebuild kit and i'm set!
man i cant wait to see my wheels filled with brake rotor!
man i'm in some damn good company with these guys. 1 guy (the brake distributor) makes cobra replicas when he's not doing brake stuff, 1 guy builds race circuit cars and rally cars, the other...well...used to be an engineer who worked on the brabham/repco formula one cars/engines in the 1970's! yeah i think they know what they are talking about...
anyway, it's definately possible. with the series 5 calipers, the fins on the caliper above the pistons need to be removed, but other than that a pretty easy mod. they think at the moment without taking the wheels off and doing some real testing 294mm rotors on the front will work no worries, 304mm at the moment is a maybe. the main problem is the wheel (since i have the stock P5 16" wheel).
they are going to work out a price for me and get back to me shortly with the price etc. so for now it's buy the calipers, get the fins removed, get the caliper powder coated (i'm going to get it black with the MAZDA in silver or just metal), buy the caliper rebuild kit and i'm set!
man i cant wait to see my wheels filled with brake rotor!
is removing the fins on the caliper because it's a 16" wheel or something different??
twilightprotege said:
twilightprotege
Member
- :
- 2001 323 Astina SP20 (P5)
I have converted my Protege rally car to accept RX7 front brakes. I will try to get pics of them up tomorrow if you're interested. If you get all the parts, we can do the necessary machining to complete this mod. Currently our design increases the track (width) of the front of the car by about 20mm (10 per side) so you might want to make sure you have tire clearance. All the pieces need to be machined. The face of the RX7 rotor is turned down thinner, the hub is machined to accept an alum. spacer, the spacer has a new centerbore lip machined into it as well as a rotor centering lip. The knuckles are also machined and the mounting holes are welded up and re-drilled/tapped. The ears on the caliper are machined, too (whew). It is a VERY tight package, but by whittling a little here and a little there, we can make these things fit. We can also mount the front calipers on the rear, but you will have some master cylinder issues to figure out. Instead, I just use the Mazdaspeed Pro rear brakes. I was bending the pins on the stock ES style brakes.
I am working on a seperate rotor/hat assembly that may stack up a little tighter and won't require the change in front track, but this will be more costly (custom rotors and machined rotor hat).
Eric
I am working on a seperate rotor/hat assembly that may stack up a little tighter and won't require the change in front track, but this will be more costly (custom rotors and machined rotor hat).
Eric
twilightprotege
Member
- :
- 2001 323 Astina SP20 (P5)
yeah pics would be good.
when you say rx7 front brakes, i assume you just mean rotors?
when you say rx7 front brakes, i assume you just mean rotors?
No, I mean 4pot calipers. The same Sumitomos that you have pictured (which are built under license from AP by the way). They are a popular brake for rally cars because they fit inside a 15" gravel wheel. don't know why you would have to remove the fins. They are not cosmetic...they do help cool the brakes. and those particular fins are closest to the external air stream, so I wouldn't remove them if you didn't have to.
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