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Bristol 90XS



Member Since: 31 Oct 2010
Location: North of Bath
Posts: 223

England 
Tarox Brakes
Hi,

Need some advice please!!

Bought some new Tarox brakes from Urban Truck and had them fitted. All looks good but the pedal feels very spongy, almost like theres air in the system. The car is coming up to its second service so I said no worries, it will need a brake fluid change anyway so I'll get it done then and that should get rid of air...

Thought take the plunge and get the rear set from TMD too, so went to my local LR indy specialist who fitted the rears no problem but still can't get rid of the spongy pedal. He has bled the brakes through 3 times and used the LR procedure by running the modulator and also using the pads to push the pistons up to release any air behind them but the pedal is still very spongy and not improved.

This isn't a dig at UT by the way - I've sent them this too and expect they will be very responsive as always but putting it out on here for any ideas too?

Many thanks
James
Post #527738 29th Apr 2016 9:56am
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Likeomg



Member Since: 29 Jun 2012
Location: Lake District / Newcastle
Posts: 2638

2010 Defender 90 Puma 2.4 HT Stornoway Grey
I have big brakes too, i was told during development they tried numerous callipers (both front and rear) with different size pistons to retail a similar pedal feel..

mine feel great..

I'm guessing someone did some development with the tarox brakes?

did you get the 6 or 8 pot fronts?
Post #527765 29th Apr 2016 11:40am
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Bristol 90XS



Member Since: 31 Oct 2010
Location: North of Bath
Posts: 223

England 
well I would hope Urban Truck have done some as they are using on a V8 they have!!

The combination is 6 pot front and 6 pot rear, rear disks are supposed to be smaller and designed for rear according to TMD.

What combo is in yours? And what make did you fit?

Thanks for reply,
James
Post #527777 29th Apr 2016 12:36pm
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Likeomg



Member Since: 29 Jun 2012
Location: Lake District / Newcastle
Posts: 2638

2010 Defender 90 Puma 2.4 HT Stornoway Grey
hmm maybe urban changed the master cylinder on the v8?

i thought tarox used standard discs?

i'm personally not a fan of tmd but will leave it at that..

I've got ap racing, 6 front 4 rear 360 disc front i think 298 rear?
Post #527782 29th Apr 2016 12:58pm
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Bristol 90XS



Member Since: 31 Oct 2010
Location: North of Bath
Posts: 223

England 
How does that setup work?

It was a long pedal with just 6 pistons on there already but these brakes are marketed for Defender so shouldn't need an upgraded master cylinder to make them work!!!

James
Post #527790 29th Apr 2016 1:29pm
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YOLO110



Member Since: 14 Feb 2015
Location: Perth Oz and Stansted UK
Posts: 1641

Australia 
It shouldn't need an upgraded master cylinder... says who?

Given the huge volume increase you have made over the additional system, I would be amazed if the OEM master cylinder was up to the job.

Been there, done that with the Lotus days. These 'improvements' need ground up engineering to be properly successful IMHO. Almost reverse engineered to really make it work properly..

And then, you fit the bigger master cylinder... then you find the brake bias is off... so then you get a bias valve fitted... etc etc!

Hope you get it sorted... Thumbs Up YOLO... You Only Live Once...
Post #527794 29th Apr 2016 1:52pm
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Bristol 90XS



Member Since: 31 Oct 2010
Location: North of Bath
Posts: 223

England 
Thanks YOLO!!

Says me Smile The brakes aren't marketed as needing a larger master cylinder, nor any adjustment either so it shouldn't need anything to be an improvement over standard!

To pay a large sum for an upgrade which is marketed as such should be just what it is!!!

Interested about what you did on Lotus before though sounds impressive!!

James
Post #527798 29th Apr 2016 2:16pm
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Likeomg



Member Since: 29 Jun 2012
Location: Lake District / Newcastle
Posts: 2638

2010 Defender 90 Puma 2.4 HT Stornoway Grey
is it spongy or just long travel?

i tried experimenting (mountain biking) with lightweight levers and more downhill focused callipers on one bike, the servo lengths etc weren't suited and in the end had less stopping power than a standard cross country setup had to really use the full travel of the leaver...

now time has moved on a bit and everything is enduro Laughing

Im no expert just chiming in my experiences...
Post #527889 29th Apr 2016 6:40pm
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Christian1402



Member Since: 17 Feb 2016
Location: Cumbria
Posts: 214

United Kingdom 2009 Defender 110 Puma 2.4 XS CSW Indus Silver
Enduro ftw Laughing
Post #527931 29th Apr 2016 9:27pm
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Pickles



Member Since: 26 May 2013
Location: Melbourne
Posts: 3782

Australia 2013 Defender 90 Puma 2.2 CSW Keswick Green
Brakes,...VERY important!!
And, they have to work, PROPERLY.
And that is why a properly engineered kit is the answer. If a brake kit is produced by reputable people, and marketed specifically for a Defender, then that "kit" should be all that is required, unless of course there are conditions attached to instructions relative to fitment.
In Aus, we don't see much of this stuff for Defenders, but there's HEAPS & HEAPS of it for Ford & Holden V8s, marketed by various companies. These companies do all the testing R & D etc, so that when you buy the kit, it works well with your master cylinder, brake fluid pipes, bias etc etc,.....which doesn't happen if you cobble up a combination of stuff yourself.
Pickles.
Post #527944 29th Apr 2016 10:18pm
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Bristol 90XS



Member Since: 31 Oct 2010
Location: North of Bath
Posts: 223

England 
@Likeomg - it's spongy with longer pedal travel but if you pump once it firms up and feels better but still not right.

@Pickles - kit is marketed for Defender with no mention of potential extra kit required or potential for this scenario

I'm posting here to find out if anyone has done this, had same issues and has overcome the issue...
Post #527946 29th Apr 2016 10:23pm
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Mjibex



Member Since: 21 Mar 2013
Location: Reading
Posts: 283

United Kingdom 2013 Defender 110 Puma 2.2 XS CSW Loire Blue
Have you driven far enough to allow the brakes to bed in?
Post #527976 30th Apr 2016 5:55am
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Bristol 90XS



Member Since: 31 Oct 2010
Location: North of Bath
Posts: 223

England 
Yes have done about 1000 miles on fronts to let them bed in. No difference since fitting rears and having system flushed through to remove any air.

Seems strange that no one seems to have fitted these brakes - loads of people sell them!

James
Post #528044 30th Apr 2016 11:34am
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familymad



Member Since: 13 Dec 2011
Location: Bucks
Posts: 3481

 2016 Defender 130 Puma 2.2 HCPU Santorini Black
Take it UT and get them to sort it? 1951 80" S1 2.0
1995 110 300TDI
1995 90 300TDI
Post #528047 30th Apr 2016 11:43am
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Likeomg



Member Since: 29 Jun 2012
Location: Lake District / Newcastle
Posts: 2638

2010 Defender 90 Puma 2.4 HT Stornoway Grey
earlier today.. Very Happy



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Post #528151 30th Apr 2016 6:26pm
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