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Suspension | Chassis | Brakes -- Sponsored by 949 Racing Relating to suspension, chassis, and brakes. Sponsored by 949 Racing. |
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03-16-2016, 01:17 AM | #43 |
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Good to see that MRT can't measure a piston size correctly. At least they are consistently horrible at everything. (for the Americans they alone are the Ecutek dealer in aus. Hence why across Australia we laugh at anyone locally with Ecutek. They do extremely shoddy work, expecially with tuning.)
Long story short. GTS/BRZ brakes fit the GT fine. You just transfer Calipers, Rotors and pads and you are done. |
06-20-2016, 03:11 AM | #44 | |
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06-20-2016, 04:59 AM | #45 | |
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On street use, brakes feel strong with none of the "shit...too much front bias" effect whatsoever. Front pads wore evenly too. Can't say much about prolonged use/abuse at the tracks though....but if you visit the tracks very frequently these "OEM" brembo brakes aren't as good as say aftermarket AP or Alcon setups anyways |
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06-20-2016, 05:05 AM | #46 |
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By the way you can't really just bolt on the wrx brakes and expect the brake bias to be similar....because they're not. Theoretically you'd get more front bias when used on the 86 due to differences in chassis balance and other factors. The wrx has a heavier front end for instance. So to counter this I ran rear pads which were 1 step more aggressive than the fronts. No issues.
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The Following User Says Thank You to Fizz For This Useful Post: | Lynxis (06-20-2016) |
06-20-2016, 05:19 AM | #47 | |
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In general, bigger pistons are better. Pressure in the brake fluid is measured in force per area, therefore the more piston area you have exposed to the fluid the more force is exerted onto the pad/disc. However, it is also important how far the pistons are placed from the center of the wheel. Are the GTS pistons farther from the center or they have same distance with the ones in GT? |
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06-20-2016, 07:00 AM | #48 |
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Are you sure on bigger pistons bit? I always thought that it's relative master cylinder area vs pistons area, so per same brake pedal travel imho with bigger pistons you'll get less pistons&pads travel/less braking. as with bigger diameter there is more volume for brake fluid, hence less piston travel per same incoming oil volume.
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06-20-2016, 07:39 AM | #49 |
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I believe the argument is correct. The idea is to maximize the pistons area and at the same time place the pistons as farther as possible from the center of the brake disk (i.e. the wheel). That's why in expensive cars you have very big disks and many small pistons (4-pistons, 6-pistons calipers, etc.) in the outer area of the disk. You cannot place a big piston in the outer area, so you have to divide the total piston area in smaller pieces. Overall, the farther away from the center then the better braking power. You can imagine it as a lever ...
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06-20-2016, 09:12 AM | #50 | |
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http://forum.liberty.asn.au/viewtopic.php?f=2&t=15690 |
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06-20-2016, 07:10 PM | #51 | |
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06-20-2016, 10:11 PM | #52 | |
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06-22-2016, 06:31 AM | #53 |
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If GT spec calipers have larger pistons, would it be better to use GT caliper with GTS bracket?
I have been using that combination to skip brake fluid work without knowing piston differences. |
06-27-2016, 09:27 PM | #54 |
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That is exactly what I did used GT calipers with GTS brackets and discs as was going to put the GTS calipers on and then found that the pistons on the GT were 3mm bigger .
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06-30-2016, 01:19 PM | #55 |
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Any Aussies / Kiwis that did the GRB ('08 - '11) STI Brembo swap on the base model 86 rear brakes able to drop me a PM? This would be the version with the stock solid (non-ventilated) rear discs. Have a couple questions regarding the ability to direct bolt on the rear calipers onto the knuckle without a need for any brackets.
Thanks.
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07-01-2016, 01:36 AM | #56 | |
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