20 replies to this topic

[lxsstorana]

I have done a few kilometres in my GTR now and thoroughly enjoyed it. The only problem which has recently occurred was a stiffening brake pedal (you needed to apply more pressure to the pedal to make the car stop).

As I have new pads, discs, shoes and wheel cylinders I believed it had to be the brake booster (which it was). Decided to upgrade the standard single diaphragm booster to the XU1 double diaphragm booster and I can't believe the difference it has make to the braking system. Would thoroughly recommend it if your LC or LJ has disc brakes.

Very simple procedure. You only have to remove the split pin and pin from behind the booster, remove the vacuum hose, undo the 2 nuts securing the master cylinder to the brake booster (and push the master cylinder to the side), undo the 4 nuts holding the rear of the brake booster to the bracket. Remove the old booster and refit the new larger booster and refit the nuts and vacuum hose, pin and split pin.

The only other job to do was to re-shape the support bar from the booster to the inner guard, which is quite easy. Didn't need to disconnect the master cylinder or bleed the brakes. Less than 1 hour to remove and refit boosters.

I was quite lucky, as I picked up an XU1 brake booster for the right price (free) and just got it reconditioned. Cost $200.00 for reconditioning and 12 months guarantee (in Sydney). Can recommend a business in Sydney, they do about 300 to 400 large brake boosters each year and I watched him recondition a HK monaro booster whilst I was there. Anyways here's some photo's.

Mick.

Before (original GTR brake booster)


New larger XU1 brake booster


After

Edited by dattoman, 08 February 2007 - 04:06 PM.

[LOWS2]

Thanks for postng this up Mick, Ive actually picked up an XU1 booster to throw on my LJ and this will certainly come in handy. Just wondering if you could shoot me the name of the place that did your booster - ive been quoted $264 by a bloke near me & would be keen on paying a little less.

Cheers,
Mick

[lxsstorana]

Hi Mick,

I got my booster reconditioned at

"Automotive Brake Reconditioning"
Address 46 Adderley Street East, Silverwater. (Sydney) NSW 2141
Phone. 9748-4944 (Peter and his brother own the business)

Cost me $198.00 ($180 + gst) to get the booster reconditioned. Comes with 12 months warranty, new diaphrams, nuts + washers and painted.

Regards,

Mick.

[gooley]

The images dont pop up for me so could someone just send it to me

[red6]

i paid $100 of ebay, looked pretty rough but cleaned it up and it works fine

[glenn stanley]

Was the big booster an option on S SL and GTR from the factory or were all these models fitted with the single diaphram one?

[Dr Terry]

Was the big booster an option on S SL and GTR from the factory or were all these models fitted with the single diaphram one?

No, the larger booster was XU-1 only.

The smaller booster was standard on the GTR, because it had factory-fitted front disc brakes as standard. S & SL models only had un-boosted 4-wheel drum brakes, with the front disc brakes as an option, so the S & SL only had small booster if they discs at the front.

Dr Terry.

[dattoman]

GTR doesn't have a special part number
Its just a standard disc front booster

XU1 booster on an LC had a few numbers or equivelents
The one I refer it to is a VH316
But alot have a VH300 or VH305 tag on the front as many are modified HK/T/G units

http://www.gmh-toran...showtopic=15747

[S pack]

Was the big booster an option on S SL and GTR from the factory or were all these models fitted with the single diaphram one?

No, the larger booster was XU-1 only.

S & SL models only had un-boosted 4-wheel drum brakes, with the front disc brakes as an option, so the S & SL only had small booster if they discs at the front.

Dr Terry.

GMH did offer as an option a single diaphram booster for Drum front brakes on LC & LJ models.

[dattoman]

There is one pushrod length to the rear of the booster where it bolts to the cantilever rod

95mm ... same as the standard booster

 

Theres 2 different lengths at the front to the master

25mm for LJ

8mm for LC

The master cylinders had different depths to the primary piston 

 

These figures are from memory and meausred from the front of the cannister

 

So since your car is an LJ... you want the deep one

Boosters can't be bought new anymore... so you'll have to hunt one up or modify a HK-T-G style one http://www.ebay.com....81f80c47&_uhb=1

Or try this guy and see if he has any to sell outright

http://www.hydroboost.com.au/index.htm