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B00sted180

S13-S14-S15-R32-R33-Z32 Brake Details

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Hopefully this will help people when they are looking at changing their brakes. I have a list of disc sizes, brake master cylinder sizes, calipers, brake boosters, split points and reducing ratios for the S13, S14, S15, R32, R33 R34 and Z32 series. If there is any information which isn't correct let me know

 

Disc Sizes

S13 CA18DET (4-Stud)

F: 250x18 (Vented)

R: 258x9 (Solid)

1991-1993 S13 Silvia (4-Stud)

F: 252x20 (Vented)

R: 258x9 (Solid)

S13 SR20DET (4-Stud)

F: 280x22 (Vented)

R: 258x9 (Solid)

S14/S15

F: 280x30 (Vented)

R: 258x9 (Solid)

R32 Turbo/R33 GTS-4 (4-Stud)

F: 280x26 (Vented)

R: 266x9 (Solid)

R32/Z32 Turbo/Z32 >1991

F: 280x30 (Vented)

R: 297x18 (Vented)

R32 GTR

F: 296x32 (Vented)

R:297x18 (Vented)

R32 GTR V-Spec/R33 & R34 GTR & V-Spec

F: 324x30 (Vented)

R: 300x22 (Vented)

R33/R34/Z32 Non-Turbo

F: 280x26 (Vented)

R: 297x18 (Vented)

R33 Turbo

F: 296x30 (Vented)

R: 297x18 (Vented)

R33/R34 GTR (Rare)

F: 324x30 (Vented)

R: 322x22 (Vented)

R34 Turbo (GT-T)

F: 310x30 (Vented)

R: 297x18 (Vented)

 

Brake Master Cylinder Sizes

BM33 – 13/16

BM38 – 7/8 (USDM)

BM44 – 15/16

BM50 – 16/16

BM57 – 17/16

2 Port – ABS

3 Port – Non ABS

 

Split Points and Reduction Ratios

S13

BM33 Split Point xxxpsi, Reducing Ratio 0.4 (CA18, SR20DE)

BM38 Split Point 569psi, Reducing Ratio 0.4 (KA24DE)

BM44 Split Point 569psi, Reducing Ratio 0.4 (SR20DET)

S14

BM38 Split Point 284psi, Reducing Ratio 0.4 (USDM)

BM44 Split Point 569psi, Reducing Ratio 0.4

BM50 Split Point 569psi, Reducing Ratio 0.4

S15 (All ABS)

BM44 Split Point 427psi, Reducing Ratio 0.2

BM50 Split Point 427psi, Reducing Ratio 0.2

R32

BM44 Split Point 567psi, Reducing Ratio 0.4 (GTS-T, GTR N1)

BM50 Split Point 284psi, Reducing Ratio 0.4 (GTR, GTR V-spec N1)

BM57 Split Point 356psi, Reducing Ratio 0.4 (GTR V-spec)

R33

BM44 Split Point 491psi, Reducing Ratio 0.4 (GTS-T)

BM57 Split Point 356psi, Reducing Ratio 0.4 (GTR)

R34

BM44 Split Point xxxpsi, Reducing Ratio 0.4 (GT)

BM50 Split Point xxxpsi, Reducing Ratio 0.4 (GT-T)

BM57 Split Point 356psi, Reducing Ratio 0.4 (GTR)

Z32

BM44 Split Point 498psi, Reducing Ratio 0.4

BM50 Split Point 356psi, Reducing Ratio 0.4

BM57 Split Point 498psi, Reducing Ratio 0.4

 

Calipers

S13

F: Cast Iron 1 x 57.2 Piston Sumitomo

R: Cast Iron 1 x 38mm Piston Sumitomo

S14/S15

F: Cast Iron 4 x 40.4mm Piston Sumitomo

R: Cast Iron 1 x 38mm Piston Sumitomo

R32 GTS-T, GTR & GTR N1/R33 GTS-T/R34 GT & GT-T/Z32

F: Alloy 4 x 40.4mm Piston Sumitomo

R: Alloy 2 x 38mm Piston Sumitomo

R32 GTR V-spec & V-spec N1/R33 GTR/R34 GTR

F: Alloy 4 Piston Brembo

R: Alloy 2 x 40mm Piston Brembo

Z32 >1992.5

F: Cast Iron 4 x 40.4mm Piston Sumitomo

R: Alloy 2 x 38mm Piston Sumitomo

 

Brake Boosters

The size of a brake booster is in relation to the numbers in the final section of the part number. It should be easily read on the booster

M23 - Single 230mm Diaphragm

195T - Dual 180mm and 205mm Diaphragm

210T - Dual 180mm and 230mm Diaphragm

215T - Dual 205mm and 230mm Diaphragm

 

NOTE: The following may not be accurate however it could be possible that brake boosters have a relation to BMC's

BM33: M23

BM38: M23

BM44: 195T

BM50: 210T

BM57: 215T

Edited by B00sted180
  • Upvote 5
  • Downvote 1

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Fun facts:

 

All Sumitomo 4 piston front calipers take the same size pad DB1170, and have 4 x 40.4mm pistons.

All Sumitomo 4 piston calipers take the same rebuild kits. All the skyline/Z rear Sumitomo twin calipers take the same kit as well

 

Calipers are 'essentially' the same, but with different length mounting arms (e.g. R32 GTS-T 280mm disc > R33 GTS-T 296mm disc > R34 GT-T 310mm disc)

 

R32 GTR and R33 GTS-T are both to suit 296mm calipers, but different thickness discs. The R33 GTS-T calipers have "Nissan" on a raised section, the R32 GTR caliper has "Nissan" on a flat section, assuming to do with caliper-wheel clearance.

 

Different models have different material calipers - S14/S15 use cast iron calipers, weighing 4.5-4.8kg (depends who you ask). The R32 GTS-T calipers are alloy, weighing 3.3-3.6kg (again depends who you ask). The Z32 uses the "same" caliper as R32, but with even more cooling fins. Z32 TT models after 1991.5 switched to a cast iron caliber, presumably to cut down on cost.

 

All Sumitomo 2 piston rear brakes (Z32, R32 GTS-T/GT-R, R33 GTS-T, R34 GT-T) are alloy caliper with 2 x 38mm pistons. All take DB1220 pads.

 

All Silvia rear brakes are single piston sumitomo, 1 x 38mm piston.

Edited by Wizard

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any info on the R34 GT-T BMC?

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They are an ABS BM50 also. Haven't seen any specific info on them though.

 

And fun facts:

 

R32 GTR - Sumitomo brakes - ABS BM50

R32 GTR V-spec - Brembo brakes - ABS BM57

R32 GTR N1 - Sumitomo brakes - non-ABS BM44

R32 GTR Vspec N1 - Brembo brakes - non-ABS BM50

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any info on the R34 GT-T BMC?

 

R34 Range has been added to the list however having trouble finding split points

 

Suggested additions?

 

Calipers

 

Caliper listing has been added.

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Great work man.

What about the booters also?

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Great work man.

What about the booters also?

 

Brake boosters added, can't grantee that their 100% accurate.

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Unhelpful post - autotragic and manual have different boosters, auto being bigger than manual (for S13 anyway).

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Can everyone give a helping hand by sending me a PM with the following details on your car and we will try and all work together towards having all this information as accurate as possible. The information requires to be original parts and not modifications.

 

- Model and Year

- Manual or Automatic

- ABS or Non-ABS

- Brake Master Cylinder Number

- Brake Booster Number

- Engine

- Turbo or Non-Turbo

 

For example

Model: 1991 180SX

Transmission: Manual

Master Cylinder: Non-ABS BM44

Brake Booster: 50F00 M195T

Engine: SR20DET

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Unhelpful post - autotragic and manual have different boosters, auto being bigger than manual (for S13 anyway).

Yep,the S13 auto booster is the same size as the S15 booster but the S15 booster doesn't bolt straight in on a S13

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R34 GT-t and R34 GT-R brakes do not fit on S13/14/15 knuckles unless you retap the spindles to accept the larger bolt.. unless you're willing to use metal sleeves on the smaller bolts.

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My setup from factory:

1991 RPS13 SR20DET AT

Non abs

BM44 master

M195T booster.

 

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Has anyone tried HFM BM57 on there s13 with gtst brakes?

 

 

Edited by HUSTLA

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Has anyone tried HFM BM57 on there s13 with gtst brakes?

 

HFM BMC is bad news. i know several people who have had to replace them within weeks of install. they're pure shit.

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Thanks, also I have a s13 1990 automatic booster, can anyone confirm these are the same internally as the s15 booster 210T?

 

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Has anyone tried HFM BM57 on there s13 with gtst brakes?

 

That's currently the set up I have. I have only driven the car up and down the drive way so far but brakes feel good.

 

Thanks, also I have a s13 1990 automatic booster, can anyone confirm these are the same internally as the s15 booster 210T?

 

All boosters with the same number will have the same internals. Read the part number on your current booster.

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Is it common practice to upgrade the booster too when you upgrade calipers/BMC?

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Yes. The Bias changes so you should change to the master that suits the brakes you are fitting.

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Is it common practice to upgrade the booster too when you upgrade calipers/BMC?

 

Going a bigger booster will only make the pedal feel softer. If you find that the pedal if too hard for your liking, going a larger booster may solve you're problem. I have got R33 gtst brakes with a BM57 with the standard 195T booster and I don't mind the way my pedal feels however I haven't street driven it yet.

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Booster has no number, its been removed and painted at some point. I know the car was originally a ca18det auto . Had a BM33 as well. Is there any other way to tell ?

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Booster has no number, its been removed and painted at some point. I know the car was originally a ca18det auto . Had a BM33 as well. Is there any other way to tell ?

 

That is information I'm having difficulty getting. I don't know what booster came with what car. Best I could do is run your cars details through Nissan Fast and see if I can determine what booster you have from the part number I receive.

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Yes. The Bias changes so you should change to the master that suits the brakes you are fitting.

 

I meant the booster not BMC. Already upgraded to a BM57 with the Brembos I have, just contemplating buying a GTR booster now.

 

 

 

Going a bigger booster will only make the pedal feel softer. If you find that the pedal if too hard for your liking, going a larger booster may solve you're problem. I have got R33 gtst brakes with a BM57 with the standard 195T booster and I don't mind the way my pedal feels however I haven't street driven it yet.

 

It's not actually hard, the first push is soft and the second it nice and firm. I've heard that the ABS module needs to be bled seperately, apparently involving some thing that triggers all the relays so it bleeds fully.

 

I have tested it out and it seems like it's not vaccum related since it does the same thing even when the cars making positive boost ie: driving. I've done some common tests to rule out the booster being faulty.

 

I'm pretty stumped at it as it has been doing this since before I got the Brembos and with the previous braking set up which was GTST calipers.

 

Edit: took the car for a drive again, seems like it's soft all the time now... Lots of play and spongy + the abs isn't working.

Edited by s13k's

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wouldnt you just need to have the engine running to bleed the ABS so that its active? Though given that the ABS is disarmed if any faults are found, you would assume that you could bleed the system correctly with the engine off.

 

I still occasionally get the vacuum related pedal softness after a boost hit on the street, although my pedal feel with full GTST setup and R34 BMC and booster is a lot better than it was previously.

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wouldnt you just need to have the engine running to bleed the ABS so that its active? Though given that the ABS is disarmed if any faults are found, you would assume that you could bleed the system correctly with the engine off.

 

I still occasionally get the vacuum related pedal softness after a boost hit on the street, although my pedal feel with full GTST setup and R34 BMC and booster is a lot better than it was previously.

 

I gave you an PM regarding this earlier today

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<edited - dont need to double up>

 

Fun facts:

 

All Sumitomo 4 piston front calipers take the same size pad DB1170, and have 4 x 40.4mm pistons.

All Sumitomo 4 piston calipers take the same rebuild kits. All the skyline/Z rear Sumitomo twin calipers take the same kit as well

 

Calipers are 'essentially' the same, but with different length mounting arms (e.g. R32 GTS-T 280mm disc > R33 GTS-T 296mm disc > R34 GT-T 310mm disc)

 

R32 GTR and R33 GTS-T are both to suit 296mm calipers, but different thickness discs. The R33 GTS-T calipers have "Nissan" on a raised section, the R32 GTR caliper has "Nissan" on a flat section, assuming to do with caliper-wheel clearance.

 

Different models have different material calipers - S14/S15 use cast iron calipers, weighing 4.5-4.8kg (depends who you ask). The R32 GTS-T calipers are alloy, weighing 3.3-3.6kg (again depends who you ask). The Z32 uses the "same" caliper as R32, but with even more cooling fins. Z32 TT models after 1991.5 switched to a cast iron caliber, presumably to cut down on cost.

 

All Sumitomo 2 piston rear brakes (Z32, R32 GTS-T/GT-R, R33 GTS-T, R34 GT-T) are alloy caliper with 2 x 38mm pistons. All take DB1220 pads.

 

All Silvia rear brakes are single piston sumitomo, 1 x 38mm piston.

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