Some times ago I decided to upgrade brakes. I wanted something with more efficiency that wouldn’t cost a fortune however but with track capabilities.
There are a lot of brands available brakes : AP Racing, Alcon, brembo, …. all very efficient and expensive. On the cheaper side you have D2 and their clones. You can also put early Nissan GTR brake. They’re great, devastating efficient. But …. they won’t fit under standard wheel and I wanted to keep standard wheels.

And in the middle of expensive and cheap you have Stoptech.

stoptech-meta-logo

Stoptech provides brake kits for a lot of applications. R34 is one of them. Each caliper is designed specifically for each car. Caliper templates are available so you can test fit them on your actual wheels before order.

I ordered front and rear kit. Front kit is the 4 pots with 355x35mm rotor. On the rear two options were available at the time : 2 pots and 4 pots. I went for 4 pots with a 355x32mm rotor. You may think « rear brake power is going to be to strong ». That’s without knowking pistons size are different between front and rear so a nice balance is achieved. Front kit part number is 83.645.4C00.xx (xx depends on the color). Rear pkit part number is 83.645.0047.xx but I think this is no longer available. Only the 2 pistons kit is available now (I saved their Stoptech 2010 catalog). Both front and rear calipers use a very common pad shape (ST40) so you have a large choices for the compound.

Kit delivered. It looks really great. But you can say it’s great when you fit it and when you have it tested. Everything is included except brake fluid : bolt, braided lines, calipers, rotors, brackets, thread locker.

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Fitting is not difficult. Patience and attention to details is the key.

You will have to cut a part of the current brake dust boot. Some choose to drop it. I choose to keep it but it must be cut so the bigger rotor can be installed.

As you can see new rotors are much bigger and thicker than standard rotor. They will achieve better heat dissipation.

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Front bracket fitted.

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Rear installation : the brake dust boot must be trimmed to installed the rear bracket :

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Wheel test fitment; it’s a tight fit but it’s been designed to fit under standard wheels. Once fitted you must change brake fluid and pay special attention to brake bed in. Following carrefully instructions is a key to have rotors and pads working at their max. After driving them for hundreds kilometeres and two track days I can say I’m very happy with the kit.

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The R34 GT-R is a great car and every details were optimized by Nissan including the battery : it’s small and lightweight : only 6.5kg ! Overall dimensions are (LxWxH) 186x126x168mm.

FT-LA19LT weight

The downsize is the battery life : small. And at some point you will be looking for a replacement battery. Then you will discover quickly that your battery is unique to your car : yes, that battery was made specifically for the R34 GT-R and it’s only available in Japan.

You need to know that the space for a new battery is limited and the battery has japanese terminals (JIS). I worked it out  for hours and you are basically down with two options beside ordering an OEM battery :

  • change the wire connectors to standard connectors and you can fit a battery like the Bosch S4 001(207x175x175) : it’s a little bigger than the original battery but will fit easily and it’s more powerfull and it will last longer. Beware that to change wire connectors special tools will be required …. it’s not advised to cut wires because they’re short
  • get a battery with JIS terminals. Unfortunately the standard height of japenese batteries is little too big for the wires : 22cm versus 16cm for the original battery. You will struggle to tighten and to stretch the positive wire on the battery.  I have never seen such a battery fitted either by myself or on google. The Bosch S4 018 is that kind of battery. It will last longer BUT it isn’t more powerfull …

JIS to SAE terminals

I said there were two options. That was until I discover some terminal adapters from JIS terminals to standard terminals ! These adapters allow you to keep the actual JIS terminals and a battery with standard terminals can be plugged in.

Strangely Nissan anticipated a larger battery could be fitted : holes for a larger battery are already done ! You will need to make a battery retainer as the original one is too small (must be 18cm between holes). So far that’s the best solution I found out regarding ease of maintenance, performance and cost.

The Bosch S4 001 weights 10kg. That’s an extra 4kg but they worth it !

To remove the battery you need to remove the black metal plate and the rear strut brace. Easy job but a lot for a single battery change.

The original and the Bosch batteries :

SLA-A19LT vs. Bosch S4001

The Bosch S4001 fits easily but you will need to trim the rear bottom of it because of the strut brace :

 

The Bosch S4 001 installed with the terminal adapters. Needless to say the car starts easier than with the original battery !

S4 001 installed in BNR34

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If you want to replace the OEM radio/CD player you will need a harness adapter. I used the CT20NS03 adapter from Nissan harness to standard ISO harness (available on ebay here for cheap). You can then plug any radio/player in your Nissan.
Nissan - ISO harness for skyline

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New wheels tested on the car as a second set for track days. Wheels are Enkei RPF1 18×9.5″ ET15 in bronze. This is a limited edition not to be mixed up with the standard gold color ! I ordered the wheels on Oakos and they’ve been more than helpful with me !

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The good news is they also clear the Stoptech front brakes that I’d like to fit on the car. I tested with the template found on stoptech website : enough room for a futur brake upgrade. More on this soon.

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Je viens de retrouver une photo de la première Skyline GTR que j’ai vue en vraie de vraie, c’était à une édition des 24 heures du Mans :

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