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Ap Racing Caliper

Kaido_RR
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Kaido_RR Grand Master

Kaido_RR

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Posted

Hi,

I've recently installed AP Racing Caliper (CP5200), with endless pads and slotted disc, on the front of my R33 GTS-T. Im still running stock rear brakes.

I have found that when hitting the brake hard (to the point, where the fronts will lock) i find that the passenger side will lock first.

Is this just a worn tyre, or uneven pad wear? my pads had around 1000-2000km wear when installed, could this be the course of the problem?

Also is this issue anything to worry about?

Cheers Michael

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Beer Baron Grand Master

Beer Baron

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Posted

I think the real problem is why are you locking brakes? generally when you are locking brakes into a corner any unloaded wheel will lock first as obviously it has less grip on the road/track so a given pressure will make it lock much more easily. so it could be tyres, could be road surface but again, I think the first order of business if find out why you are locking brakes.

djr81 Grand Master

djr81

Posted
Posted

Hi,

I've recently installed AP Racing Caliper (CP5200), with endless pads and slotted disc, on the front of my R33 GTS-T. Im still running stock rear brakes.

I have found that when hitting the brake hard (to the point, where the fronts will lock) i find that the passenger side will lock first.

Is this just a worn tyre, or uneven pad wear? my pads had around 1000-2000km wear when installed, could this be the course of the problem?

Also is this issue anything to worry about?

Cheers Michael

Well one or other of them has to lock first - usually it is the unloaded side.

But if you have put used pads in then, yeah that is probably your problem.

djr81 Grand Master

djr81

Posted
Posted

Cheers guys,

the reason for locking the brakes is to find out the new locking point, as the pedal feel has changed.

Can you offer any feedback as to how good/bad/indifferent the set up is?

How is the bias?

How is the pedal feel?

Which rotor size did you use at the front?

Kaido_RR Grand Master

Kaido_RR

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  • Author
Posted
Can you offer any feedback as to how good/bad/indifferent the set up is?

How is the bias?

How is the pedal feel?

Which rotor size did you use at the front?

sure :glare:

Just for extra information:

Old Setup:

Stock Gts-t Caliper and disc with Bendix ultimate pads (F & R)

New Setup:

Ap Racing CP5200 Caliper with endless pads and 323 slotted disc (front)

Standard Gts-t rear caliper & disc with std pads

So far i have yet to test the new brake setup on the track but i will be doing that this sunday at mc; so atm my feedback is purely base on how i have tested them on the street.

Compare to my old setup, the brakes bit alot harder, and stop the car alot quicker. Also the car still feel balance under braking. I notice the greatest difference at high speed Around 100-120km/hr to low speed of 60km/hr, the car feels much more balance and stop alot quicker.

As mention above the bias is ok, at first i through i would have problems with the rear end not slowing down enough compare to the front but i didn't have any such problems. The only issue i see is that the front lock first.

In the beginning the pedal felt alittle harder compared to my oldsetup, but after a few days of driving it seem to soften up alittle but it is still harder compare to stock (only minor difference, as my oldman drives the car alot and he didnt notice the difference). I found thou that the amount of force required to push on the pedal to lock the car up is less than the stock setup.

Disc size are 323 slotted, im currently running nismo lmgt2 17inch rims, so im hoping i may be able to increase the size of the disc but i don't know what the max. size of the disc is for the caliper :D

final comments :ninja: I love the new setup, and can't wait to see how it will affect my times when i hit the track

Cheers Michael

Lunatikk Rising Star

Lunatikk

Posted
Posted

Michael if you've only driven the car on the road there's a better than average chance it's simply the road-surface camber causing the inside front to lock first, my Brembo 8's do exactly the same thing on certain roads. As long as all your alignment specs are OK it shouldn't be anything to worry about.

Something else to think about is how they brakes have been bedded. From the pics there looks like there's a nice layer of pad material on the rotors (although pics can be deceiving). Even if you think you know how to bed brakes in this article is well worth the read 'cos, with respect, I have spoken with several people about this exact matter in the past & even though they claimed to know it all, in reality they had NFI......

Enjoy!!

http://www.zeckhausen.com/bedding_in_brakes.htm

Kaido_RR Grand Master

Kaido_RR

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  • Author
Posted

ok just got back from a mc skid-pan day

in the beginning it took me a few runs to get used to the brakes, on my 1st run i locked up the front going 100km/hr and went off the skidpan onto the grass lol, then coming into the stopping zoned i locked up the fronts again.

Once i got used to the brakes, they stop the car alot quicker, and i was able to brake later. still need some more time to get used to them, also my tyres started to wear quick alot towards the end of the session, so i had to start braking earlier.

But all in all, i can say im extremely happy with the brakes.

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