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R35 Brake Booster & Master Mod - R32 GTR - Complete

deongster

By deongster,
in Tutorials / DIY / FAQ

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deongster Mentor

deongster

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On the R35 BM size - confirmed Fitting Size = M12 x 1.0 

R32 Fittings Sizes = -3 JIC

Cost so far:

Brake Master - $189

Brake Booster - $149

3M of 10mm Silicone Hoses - $34

Aluminium One Way Valve - For Booster - $13.50

HEL Custom Lines below - $150

Left Fitting -Swivel Male
Left Fitting Size - M12x1.0  
Left Fitting Angle - 70°
 
Right Fitting - Swivel Female
Right Fitting Size - 3/8" x 24 UNF (-3 AN JIC)
Right Fitting Angle - 45°
Length - 20cm
 
image.thumb.png.9c18b560c89c332e0a842eed9e34b833.png

I rounded the nut on the master for the old R32 brake line - it was completely seized - so i decided to custom 2 lines from Master to the ABS unit.

Front Master Port - $75.00
 
Left Fitting - Fixed Male 
Left Fitting Size - 3/8 x 24 UNF (-3 AN JIC) 
Left Fitting Angle - Straight 
Right Fitting - Swivel Male 
Right Fitting Size - 3/8 x 24 UNF (-3 AN JIC) 
Right Fitting Angle - 70° 
Length - 97cm - extra 1cm

Rear Master port - $75.00

Left Fitting - Fixed Male 
Left Fitting Size - 3/8 x 24 UNF (-3 AN JIC) 
Left Fitting Angle - Straight 
Right Fitting - Swivel Male 
Right Fitting Size - 3/8 x 24 UNF (-3 AN JIC) 
Right Fitting Angle - 70° 
Length - 91cm - extra 1cm

This is how the line will roughly look like:

image.thumb.png.d3f69b5fc8fa1cdcc0deaa21384a5cc0.png

332808026_176364501812714_5217128666932624682_n(1).thumb.jpg.a865451620218319b869fa0158ab0b53.jpg333003612_3521060741511220_8274232529391343397_n.thumb.jpg.f7e7a4c702bc46e6b15e5bdc2d72624b.jpg335016031_625456392729126_3720102994372258975_n.thumb.jpg.aa53c1894983aa923436d765011f15fe.jpg

This is roughly how it looks out of the car ^ i have made a few adjustments to the Angle of the BMC Fitting - as well as threw the adapter away cos it was the wrong size - and remade the whole line again. But it looks very similar - the most updated line specs is above

This is how i plan to run it - please use imagination a bit - i will take more pictures once its installed. But the 2 lines will run across the firewall similar to the original hard lines.

image.thumb.png.98cf00f91cd063b61fef258f541d64d6.png

Confirmed the Plug is the same as BM57 - its quite hard to get the plug - it is shared with a LOT of different cars - R35, Pathfinder, G35, Subaru WRX, Ford Fiesta - but its almost impossible to buy one - and 100% impossible to get in Au

I found the details in the thread below - have to thanks to @BK for ALL the research he did - especially in where to purchase. MOTORCRAFT WPT-1385 is the part number - meant for Ford. Wired up - it will fit perfect.

image.png.2a2690ba78283fffa51e12a57d7565b6.pngimage.thumb.png.6ff14ba2611ccca68b65539af8c105c1.png

image.thumb.png.0dccd5762504231161386691c00bb6d4.png

Below is the Final completion - remove the 4 nuts in the car cabin at the brake - and remove the R32 BMC and Booster

R32 Right booster

image.thumb.jpeg.2f11a347e07e0a2a7253c6fb26e44a42.jpegimage.thumb.jpeg.850af040cd39932bc1aedaef8f229056.jpeg

R32 and R35 U Clevis and - the one at the bottom is from the R32 GTR - MUST reuse this for R35 Booster

image.thumb.jpeg.2cad6fe9c292bc55a3a24ba10e9bc948.jpeg

There is a Spacer for the R35 that looks like this - this will not need to be used - it should be mounted directly on the FireWall

WhatsAppImage2023-07-04at8_48_07PM.thumb.jpeg.244481a0438f2e2ef80a1133d7e69026.jpegWhatsAppImage2023-07-04at8_48_06PM.thumb.jpeg.a3f648330f5968a6297044b5192917ef.jpeg

Just use the Gasket and put the Booster on the Firewall

image.thumb.jpeg.159b0c00e3752bd173fd1af48a68d5a4.jpeg

Roughly how it looks when mounted up

image.thumb.jpeg.2bb38e61f165f03a7da97480a64cb0bd.jpeg

This is the complete work - with 2 sets of Custom HEL lines.

image.thumb.jpeg.8ce2ecce70604456cd3731d259dda92d.jpegimage.thumb.jpeg.bd1f47307c579bc26ed17641fbbe1c87.jpeg

Once installed - i found the following - the brake pedal is slightly lower than the R32 Original

WhatsAppImage2023-06-26at12_37_22AM.thumb.jpeg.5b81edc3a72cb808178ff6c69770e91f.jpeg

Overall it was very easy to do - and a massive learning process for me. Had a lot of help along the way from @BK and @Meap that did all these first. I hope whoever that attempts this moving forward - this Post will help you. The biggest problem i faced when doing this was the BMC Fitting size and how to run the lines. As well as old rounded lines on original lines.

The brake pedal 100% feels firmer and more solid - i will be doing a track day on Thursday - will report back after.

Good luck!!

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deongster Mentor

deongster

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Posted
1 hour ago, Duncan said:

Great post!

If you want the brake pedal higher, you can adjust it at the threaded rod/clevis. If you have run out of length the rod could be modified/lengthened

hey duncan - yeah its already at max now - so im going to give it a go on Thursday - and if it doesnt hamper the braking and heeling - then ALLLLLLLL GOOOOD!

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