Brake Upgrades S13... Brembo Rotors, Gtr Calipers, Wilwood Kit?

[Beer Baron]

the s14 caliper is average compared to r33 etc... just something to bear in mind.

hmm,. I didn't know that. is that why you used 33 skyline gear on my silvia? thanks big boy.

[Risking]

you can also pick up second hand 996 cup car calipers very cheaply.

I have 997 cup car brakes on my GTR. Initial purchase was fairly cheap, rotors are semi easy to find second hand and adaptors we make ourselves.

Problem with them is the pads are so expensive and very limited to pad suppliers.

The 996 ones might be better though.

[phunky_monkey]

I was told that the cup car calipers were very prone to warping, have you had any issues with that?

[Risking]

None what so ever.

They are pretty large and open across the bridge but the 997's have mounting points a very long way apart. I know John has been using them for a while too and has had no issues.

[SRS13]

Before I start, apologies for all the questions but rushing in and asking later has already caused a few headaches

OK - About to get an AP Racing kit for the front - AP CP 6600 Caliper with 330mm DBA 5000 rotors and Ferodo 2500 pads. Rears will be standard S13 for now.

AP Racing CP6600 Caliper Information

Before I do get this: Issues with this set-up, what else will be needed?

Do I need to upgrade my master cylinder and brake booster?

Will the S13 SR20DET master and brake booster handle it well enough? I dont know what master the S13 has standard.

Are the GTR master cylinder and brake booster sufficient?

Will upgrading the master and brake booster provide better braking ability?

Will upgrading to these items whilst using the standard rears cause bias or other issues?

Do I then need to upgrade my rears to R33 GTST or R32 GTR items? is it better to run R32 GTR rears if I get the R32 GTR master cylinder or wont this matter.

Thanks in advance guys

[Simonster]

Before I start, apologies for all the questions but rushing in and asking later has already caused a few headaches

OK - About to get an AP Racing kit for the front - AP CP 6600 Caliper with 330mm DBA 5000 rotors and Ferodo 2500 pads. Rears will be standard S13 for now.

AP Racing CP6600 Caliper Information

Before I do get this: Issues with this set-up, what else will be needed?

1.Do I need to upgrade my master cylinder and brake booster?

2.Will the S13 SR20DET master and brake booster handle it well enough? I dont know what master the S13 has standard.

3.Are the GTR master cylinder and brake booster sufficient?

4.Will upgrading the master and brake booster provide better braking ability?

5.Will upgrading to these items whilst using the standard rears cause bias or other issues?

6.Do I then need to upgrade my rears to R33 GTST or R32 GTR items? is it better to run R32 GTR rears if I get the R32 GTR master cylinder or wont this matter.

Thanks in advance guys

1. yes, i was running out of both air and pedal was travelling a long way with the 15/16ths master cylinder and standard S13 booster. GTR item is much larger, GTR top standard S13 bottom

I Now run a GTR booster and 1inch master. Sooooo much better.

2. see answer 1

3. see answer 1

4. see anwer 1

5. no, hasn't on mine and i have gts-t 2 pots on the rear.

6. see answer 5

[SRS13]

Thanks.

It is much larger. Any dramas with fitting it up in place? Is it a direct bolt in, do all the lines match up or does it require some modifications?

In relation to Question 5, your gtst 2 pots are the same as the gtr 2 potsI believe, which the GTR master normally comes with. If I run the s13 standard single piston rears will this cause problems with braking?

[Simonster]

Thanks.

It is much larger. Any dramas with fitting it up in place? Is it a direct bolt in, do all the lines match up or does it require some modifications?

In relation to Question 5, your gtst 2 pots are the same as the gtr 2 potsI believe, which the GTR master normally comes with. If I run the s13 standard single piston rears will this cause problems with braking?

Remember my car runs a RB25, i also use a custom inlet manifold, it sits very close but doesn't touch I imagine you'd have more room with an SR?

Yes it bolt straight in, used the vacuum line i had in there.

The booster is only there to provide assistance, its the brake master cylinder that does the work via your foot. Now a 1inch item from an Australian R31!!

I couldn't answer if the single rears would upset the brake balance, if it does ( which i suspect it won't) it all comes down to pad choice again. Put it this way i use the same pad front and back, i have no braking issues

Here's a little gem for you. It's a rule of thumb, not exact, but for every 1kg change of rolling mass ( ie going to a larger, heavier brake rotor) a 1kg rotating mass increase is equivalent to an increase in the cars weight by 10kg. So, if your brake upgrade adds a measly 2kg of rotor weight on each front wheel, you've effectively added 40kg of mass to the car.

The ONLY reason i changed to a 324mm rotor up from the 280mm was the rotors were under legal size, so i thought i'd give the caliper some extra mechanical advantage with an increase in rotor size. The above example is what happened to me, but the extra performance of the rotor/pad combo, more than made up for the "increase in weight".

Some food for thought.

[phunky_monkey]

Hey mate, is the R31 MC non-ABS? That's an interesting choice, I'd be keen to see if that's the case as I imagine they'll be a hell of a lot cheaper than an R32 GT-R N1 MC

[Simonster]

Hey mate, is the R31 MC non-ABS? That's an interesting choice, I'd be keen to see if that's the case as I imagine they'll be a hell of a lot cheaper than an R32 GT-R N1 MC

I couldn't be certain, i found it in a wrecker, most of the engine bay had been ratted, the MC was all that was left, but from memory, there was no ABS- don't quote me

[phunky_monkey]

That's good to hear, might have to make some enquiries about the R31's, could work out to be a much cheaper option.