FD RX7 front brake calipers
#1
FD RX7 front brake calipers
i've been sitting here in my room thinkin' of whether i should upgrade my brakes to a big brake kit or just replacing with oe size slotted rotors and better pads.
big brakes cost too damn much and i might run into the problem of fitting wheels. oe size slotted rotors and better pads will just leave me with a ugly brake caliper (no...i'm not painting it. it looks cheesy to me).
so my other thought was, finding a front set of FD RX7 brake calipers. they are aluminum, so polishing them would be perfect. they are 4 piston calipers, but fit in the stock wheel (16x8 +50). the only thing i would need is some sort of caliper bracket.
anyone have any thought/opinions on this? does anyone know how much of a difference in size the FD RX7 rotors are compared to the RX8? do you think the stock RX8 master cylinder is adequate?
big brakes cost too damn much and i might run into the problem of fitting wheels. oe size slotted rotors and better pads will just leave me with a ugly brake caliper (no...i'm not painting it. it looks cheesy to me).
so my other thought was, finding a front set of FD RX7 brake calipers. they are aluminum, so polishing them would be perfect. they are 4 piston calipers, but fit in the stock wheel (16x8 +50). the only thing i would need is some sort of caliper bracket.
anyone have any thought/opinions on this? does anyone know how much of a difference in size the FD RX7 rotors are compared to the RX8? do you think the stock RX8 master cylinder is adequate?
#2
it would be nice if it works.
my reply wasn't much help since you have thought of most of the problems.
be interesting in seeing what you discover.
my reply wasn't much help since you have thought of most of the problems.
be interesting in seeing what you discover.
Last edited by rotarenvy; 09-24-2005 at 09:41 PM.
#3
RX7 FD 103 4/92 on F vented dia 294 width 22 min thickness 20
R Vented dia 294 width 45 20
RX7 SP Series 6 4/92 on F Vented 314 32 30
R Vented 314 45.5 20
RX8 - Sports Suspension Models 2003 - on F Vented 320 24 22
R Vented 300 18 16
R Vented dia 294 width 45 20
RX7 SP Series 6 4/92 on F Vented 314 32 30
R Vented 314 45.5 20
RX8 - Sports Suspension Models 2003 - on F Vented 320 24 22
R Vented 300 18 16
#6
I don't think DAN want smaller brakes, just 4 piston calipers.
I doubt it would be of any benifit. it is unlikly the rx-7 calipers have the same pad area and by the disc sizes above you would need new rotors. then there are potential piston area and master cylinder problems.
if you could use the calipers, you would get aluminium, 4 pots on std rx-8 disc's.
I doubt it would be of any benifit. it is unlikly the rx-7 calipers have the same pad area and by the disc sizes above you would need new rotors. then there are potential piston area and master cylinder problems.
if you could use the calipers, you would get aluminium, 4 pots on std rx-8 disc's.
#8
車の性能の違いが戦力の決定的差ではない ということを
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Use the brake system from RX7 is not a good idea for RX8
Althought it is a 4 piston set, the performance is not as good as stock one of 8.
I once read the comment on previous (2 or 3 back volume) RX7 megazine (sorry it's japanese megazine)
Brembo, stoptec or alcon system may be a better choice but there are all expansive.
Althought it is a 4 piston set, the performance is not as good as stock one of 8.
I once read the comment on previous (2 or 3 back volume) RX7 megazine (sorry it's japanese megazine)
Brembo, stoptec or alcon system may be a better choice but there are all expansive.
#11
Kaiten Kenbu Rokuren
Originally Posted by Im_DANomite
ok...well thanks for the info. that blows my idea right out the window. looks like i gotta either paint the stockers or upgrade to a big brake my wallet kit.
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
#12
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These numbers are from Road&Track ('95 Road test for RX-7, Aug. '04 test for RX-8):
Braking 60-0: 123 ft (RX-7), 110 ft (RX-8)
Braking 80-0: 222 ft (RX-7), 193 ft (RX-8)
So putting the 7's brakes on the 8 would be a very bad move. Given that the 8 already weighs more than the 7, the numbers would be even worse.
The stock brakes are great, and give the 8 a best in class capability. I've seen test articles where tuners "upgraded" the brakes, but the numbers were worse than stock. But if you're after looks and not performance, that's another story.
Braking 60-0: 123 ft (RX-7), 110 ft (RX-8)
Braking 80-0: 222 ft (RX-7), 193 ft (RX-8)
So putting the 7's brakes on the 8 would be a very bad move. Given that the 8 already weighs more than the 7, the numbers would be even worse.
The stock brakes are great, and give the 8 a best in class capability. I've seen test articles where tuners "upgraded" the brakes, but the numbers were worse than stock. But if you're after looks and not performance, that's another story.
#14
Bummed, but bring on OU!
Originally Posted by Im_DANomite
ok...well thanks for the info. that blows my idea right out the window. looks like i gotta either paint the stockers or upgrade to a big brake my wallet kit.
Not necessarily. You can get aftermarket calipers in a wide range of sizes. I'm sure you can find some to fit the stock rotor.
for example
I don't know the price, but it's definately cheaper than a rip off big brake kit.
#17
Hot Pit
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I think the rx8 rotor is big enough already, they are 13" dia and 0.9" thick. So i would go for the mazdatrix set up, they are using the brembo cliper with the stock rotors. all you need is a spacer if using stock wheel. The price is cheaper then the other so call big brake kit. "most of the big brake kit using 332 x 32 so the dia is the same only thing change is the thickness and the four piston"
Last edited by Winning 8; 09-29-2005 at 11:36 AM.
#18
![](http://www.fd3s.net/magazine_articles/Motor_Trend_article01.10.jpg)
That's testing a 1993 R1 model, which has superior suspension and tires to the base model.
Braking 60-0: 123 ft (RX-7), 110 ft (RX-8)
Braking 80-0: 222 ft (RX-7), 193 ft (RX-8)
Braking 80-0: 222 ft (RX-7), 193 ft (RX-8)
Rx-7 and Rx-8 brake systems are pretty close. If you really want to upgrade your stopping distances then get some sticky tires. More clamping force != better stopping distances necessarily.
#19
The Turkish Delight
The Grand Am racers use the stock braking system of the RX-8 and use racing pads. There is nothing wrong with the stock brakes on the 8. The Speedsource guys use them.
#21
No respecter of malarkey
iTrader: (25)
Originally Posted by legokcen
The Grand Am racers use the stock braking system of the RX-8 and use racing pads. There is nothing wrong with the stock brakes on the 8. The Speedsource guys use them.
because they have to, they are not allowed to change some parts per the rules, otherwise they'd do it for nothing more than the weight savings, the OE brakes are heavy.
#22
Momentum Keeps Me Going
Originally Posted by (in their own forums) RacingBrake.com
(for the RX-8) We believe the most needed brake upgrades is a better rotor and pad while caliper upgrade is not as essential in terms of the extra cost vs. the improvement you can gain w/o even regard to the extra cost required for larger rims and tires in most cases (luckily RX8 has 18” rim). In fact we are offering our same two-piece rotors to Sylvain Tremblay – A well know Mazda racer who prefers to race with stock caliper. (His review on our rotor will be posted) http://speedsourceinc.com/index.cfm?template=ssabout
Last edited by Spin9k; 02-04-2006 at 06:48 AM.
#23
The Turkish Delight
Originally Posted by TeamRX8
because they have to, they are not allowed to change some parts per the rules, otherwise they'd do it for nothing more than the weight savings, the OE brakes are heavy.
Thanks for the clarity. We were talking with Speedsource at Barber Motorsports Park and they were very happy with the stock brakes. Hell, I'm happy with the stock brakes. I put HP+ pads on and now when I stand on the brakes, it emties out my tear ducts.
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
#25
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If you must change the caliper, these seem to be reasonably priced:
http://mazdatrix.com/8brakes2.htm
http://mazdatrix.com/8brakes2.htm
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