Outer Limits 4x4 Board

About to put an LS1 in my GQ (factory 4.2 carby) and figured it best to upgrade the brakes before I do..
I want to keep my 15 " wheels.

Any suggestions? can skyline or cruiser 4 spots be converted to suit?

What year gq is it? The later series 2 gq has bigger brakes that still fit in a 15" rim.
The 4.8 gu has bigger brakes again but pretty sure you need a 16" rim.

Jimbo wrote:What year gq is it? The later series 2 gq has bigger brakes that still fit in a 15" rim.
The 4.8 gu has bigger brakes again but pretty sure you need a 16" rim.

89 model wagon
whats required when fitting later gq ones - just discs n calipers? or do i need hubs?

I think its just disks and callipers

I have just put the Twin Piston GQ callipers from a 92 EFI model onto my 92 Diesel single piston ones

What you need is the Callipers and anchor plate from the twin piston one and rotors. If you want to keep the backing shields on the rotors at the front you need the twin piston backing shields as they are bigger cut out to support the larger calliper

Also i would advise a brake master cylinder upgrade as i just did mine and the standard one isn't able to keep up, very spongey brakes. I am going to put a GU master cylinder and brake booster on tomorrow and see how that helps

Thanks..

Anyone got some GQ twin spots calipers etc for sale??

interested to hear how you go with gu master and booster. heard it's a decent upgrade. i can't even lock up my wheels on the road

MyGQ wrote:I have just put the Twin Piston GQ callipers from a 92 EFI model onto my 92 Diesel single piston ones

What you need is the Callipers and anchor plate from the twin piston one and rotors. If you want to keep the backing shields on the rotors at the front you need the twin piston backing shields as they are bigger cut out to support the larger calliper

Also i would advise a brake master cylinder upgrade as i just did mine and the standard one isn't able to keep up, very spongey brakes. I am going to put a GU master cylinder and brake booster on tomorrow and see how that helps

x 2 ...let us know how that goes, sounds like a good fix for the GQ's notoriously bad brakes.

why not just upgrade what you've got?

I fitted slotted rotors, good EBC pads, changed the brake fluid because I'm sure that had never been done and fitted stainless braided brake lines.

Truck pulls up awesome now and it only cost me about $500.

the twin pot series 2 gq upgrade is the best bang for buck upgrade, hence why nissan made it factory

i have finally got the GU booster and Master cylinder in the patrol now and what a difference that makes to stopping power.

The brake pedal is soft to push down but i stop bloody quick

thanks for the reply mate. what should people pay for the gu booster and master?

MyGQ wrote:i have finally got the GU booster and Master cylinder in the patrol now and what a difference that makes to stopping power.

The brake pedal is soft to push down but i stop bloody quick

Hey this sounds like a good upgrade, any mods needed or is it a straight bolt on replacement

I just fitted GU diffs front and rear in my gq which originally had the single piston fronts and drum rear and it does seem like it needs a larger bore master cylinder, pedal effort outweighs braking abillty. Was the master and booster you used off a GU with abs??

cheers john.

351ciofgrunt wrote:

MyGQ wrote:i have finally got the GU booster and Master cylinder in the patrol now and what a difference that makes to stopping power.

The brake pedal is soft to push down but i stop bloody quick

Hey this sounds like a good upgrade, any mods needed or is it a straight bolt on replacement

x2

Ok for everyone who has asked

The GU Master Cylinder and booster isn't a straight bolt on job, there is a bit of dicking around

To put the booster and master into the car is straight remove the bolts from insde the cab that holds the booster on and swap it out with the GU.

What you have to do is on the distribution block on the chassis (accessed through the right hand side front wheel arch) you need to swap the brake pipes as the master Cylinder on the GU are reversed compared to the patrol and this took me quite a few hours.

When its done you will notice that the brakes are extremly responsive

What i got my booster off was a 2000 model GU TB45 but you can get any GU master Cylinder for Disc/Disc setup WITHOUT ABS.

thanks for that mate. very helpful info

Jimbo wrote:What year gq is it? The later series 2 gq has bigger brakes that still fit in a 15" rim.
The 4.8 gu has bigger brakes again but pretty sure you need a 16" rim.

Jimbo,
I have 17" rims, so does this mean the 4.8 gu will fit following the above procedure?

My brakes suck ass also.

Cheers

Ok here is the info

All GQ Carby and Diesel patrols from 88 to 97 use Single piston Front Callipers. the EFI patrols in the ST, RX and TI use Twin Piston Front Callipers.

If you want to do the upgrade you need to ask for GQ EFI callipers.

I was looking at getting GU Callipers and bolting them to the GQ swivel hub but not sure if they will bolt straight on

I'm not sure about the 4.8.