05 model CV8 brakes

[cv8 mike]

Been searching for discs for the monaro all over the internet as mine are wobbling the steering wheel and juddering the whole car especially at 40mph everytime. So far i've found out my 05 twin tail pipe cv8 is a Holden VZ monaro and found some things in Australia like here but i cant find discs on their own, good prices though.

www.nvu.com.au/products_show.php?cat=4

Found some EBC discs in America but I dont know the equivalent Pontiac GTO model so i'm going on disc sizes and the fronts are the same 12.6" for 320mm diameter but the rears seem to be very slightly smaller 11.2" for 284mm and should be 286mm. They are also labelled up for a 6.0L.

http://www2.partstrain.com/store/?Ntt

Anyone know if these will fit mine? They seem well priced even though shipping will be pricey I'd imagine.

Cheers

Mike

[Bonnie and Clyde]

Obviously its not under warranty so i'd say you'll need new Front disc's, as we did when we had the same symptoms. Where to get them from, well The Fish would do them. Some of the other guys (Stig) had some VXR Brakes off Ebay at a good price. It may be worth looking under Monaro VXR Brakes and see if you get anywhere with that. Sorry about waffling

[Higgster5.7]

I have some 04 cv8 discs and performance pads think they are the same brand new in the shed got them before I upgraded to ap's make me an offer bare in mind they are brand new

[cv8 mike]

Hi mate,

Pretty sure the 04 model uses smaller brakes that cant be fitted to the later CV8. Hopefully someone can confirm this.

Cheers

Mike

Edited by cv8 mike on Wednesday 29th April 21:19

[Hex]

You may find that your disks aint actually warped but instead its "pad transfer".

Try some more abrasive type pads for a while and see if that makes a difference.

Im sure Roger will be able to assist.

[wolfracer]

cv8 mike said:

Hi mate,

Pretty sure the 04 model uses smaller brakes that cant be fitted to the later CV8. Hopefully someone can confirm this.

Cheers

Mike

Edited by cv8 mike on Wednesday 29th April 21:19

05 Cv8 facelift has bigger brakes than the 04....but not as big as the VXR
to the OP
Have you tried friction pads?
Without trawling old ground too much, disc warping is in most cases not true, it is generally material transfer caused by hot brakes melting pads onto the discs causing high spots.

Friction pads work by scrubbing the surface, stopping transfer...

I have done 60k on friction pads and can support their effectiveness.

hth

[Cv8 mike]

Thanks for the replies.
My problem started after the car was left sitting for a week then got worse the next time I was offshore and it sat for two weeks.
I have used a soft flapper wheel on the discs and pads to remove what looked like a heat scorching coating which did help but there's no getting away from the fact they shake bad at 40mph and get better. Mind you they don't seem to judder as much if you stomp on them, possibly a sticking caliper piston?
I should probably try performance pads and see how it feels,the front discs have only done 5k.

[granada203028]

I watch this thread with interest as I increasingly need to improve my brake judder. Measurements last year see link still suggest simple warpage.

www.hsv.org.uk/topic.asp?h=27&

Obviously I would like to use new parts but some of prices don't make sense when basic cast iron disks of similar size for Omega's etc are peanuts in comparison. I will probably try skimming first.

If we could at least identify EBC p/n that would be a big step forward. Initial research suggest there is some kind of market manipulation at work and they are not for sale in the UK even though they are made here???

[Cv8 mike]

Well I think I'll contact EBC brakes shop and ask about the disc part no's as I think the discs in my first post are correct seeing as the ebc pads for them are the same part no as the ebc brakes shop quotes for my cv8.

[V88Dicky]

The Pontiac GTO 6.0 does have the same brakes as a VZ Monaro and the ones for sale by EBC should fit no probs. I've been meaning to send them an e-mail regarding why their discs aren't available in the UK for the Monaro. If you get any response from them please let us know. It would be nice to have an option other than the ridiculously priced stock items or the hideously expensive APs!

[cv8 mike]

Thanks, I thought as much but its good to hear it from someone else. I have e-mailed them for availability and prices for UPR7299 & UPR7301 also GD7299 & GD7301 which are not listed anywhere on their site even though they deal direct with EBC.
Apparently its four hours for a response so fingers crossed they'll come back with something.

[cv8 mike]

Oh well so much for getting these in the UK.

Response from EBC Brake Shop,


Hi Mike,

I have double checked the parts catalogue and with the factory and we don't have anything listed for your Monaro. I have tried the part numbers but still can't find anything. It might be that they are exclusive parts to the US market.

Kind regards,

Sales Support

So no doubt i'll have to just buy them from the states. For anyone thats interested these are the EBC part No's I will be trying to purchase.

Fronts UPR7299
Rears UPR7301
Or
Front grooved GD7299
Rear grooved GD7301

Cheers

Mike

[anonymous-user]

I have the same car as yours and looked at several options:

wormus said:

As you know I have spent the past couple of weeks researching this; here are my findings:

Even though mine has the upgraded PBR brakes from the Corvette C6, they're still crap. The discs were replaced at 12k miles under warranty and just 8k miles later need doing again.

The most obvious replacement are the APs but at £2600 a set they are expensive.

Next came the DBA 4000 replacement discs www.dba.com.au/view_product.php?part_id=3576&FK_vehicle_model_series_id=1502 .4 discs came in at £1500 inc fitting and pads, retaining the original calipers. However I was told from several sources that they are "too hard" and can crack.

I thought I'd struck gold when I found http://stores.ebay.com.au/MR-SPARES as they offered me some slotted GMH replacements for about £700. However, someone pointed out to me I'd have to pay import duty and VAT, pushing the price up to about £1k and the discs themselves would be no better than the ones I'd taken off!

StopTechs, while good work out about the same price as the APs.

Finally I spoke to Mark at Rapid and he told me about the Wilwood brake upgrade. He's fitted a few of these to Monaros and Corvettes over the years with no problems & happy customers. The complete package including 6 pot calipers (4 pot rear), discs and braided hoses works out at about £1800, although he's going to give me a proper quote on Monday. Assuming this is the case, this is what I'll get:




www.wilwood.com/BrakeKits/Pages/03/index.asp

In the end the Wilwood's ended up at the same price as the APs. You can get APs for under 2 grand now and that's what you need to get. Don't bother with anything else as they won't be as good.

Here's the original thread: www.hsv.org.uk/topic.asp?h=27&t=523443&r=7820852&hm=71889

[the muppet]

I'm watching this with interest as my '04 vxr has begun to judder under braking. The discs are relatively new so I guess that it might be build up of pad material. I suspect that if upgraded to AP's then they would be shot within months as my car gets parked up right on the coast for two weeks at a time. My standard discs are orange rust when I pick the car up - might invest in some more aggresive pads from the Fish come service time.

[cv8 mike]

Cheers for the advice and I see what your saying but I dont intend to pay around 2k for brakes if I dont plan on having the car that long. All i'm after is an alternative to vauxhall for stock discs that arent silly prices and maybe some monkfish performance pads.

Thanks

Mike

Edited by cv8 mike on Thursday 30th April 19:53

[stigmundfreud]

mike get out on a motorway late at night, drive for a bit and do some light dragging of brakes. Then drive (if clear behind) do some high speed slow downs (not stops) say hard on at 70 down to 40 then pick back up. I had that problem once after the car was stood for a month. This was a few years back now but I knew it wasnt disk warping, they simply dont just warp and I still dont buy into the stuff spouted off. The symptoms I had were that of warped (according to other members) but it was just st built up on pads and discs. Took one trip down to te next junction then back and all was sorted out.

The discs are ferous and so will get a rust residue if left unused in damp conditions. This can cause binding between pad and disc and thats what you are probably experienceing. It could even be a little bit of grit, something as simple as that.

[broadslide]

^^WHS^^

[cv8 mike]

stigmundfreud said:

mike get out on a motorway late at night, drive for a bit and do some light dragging of brakes. Then drive (if clear behind) do some high speed slow downs (not stops) say hard on at 70 down to 40 then pick back up. I had that problem once after the car was stood for a month. This was a few years back now but I knew it wasnt disk warping, they simply dont just warp and I still dont buy into the stuff spouted off. The symptoms I had were that of warped (according to other members) but it was just shit built up on pads and discs. Took one trip down to te next junction then back and all was sorted out.

The discs are ferous and so will get a rust residue if left unused in damp conditions. This can cause binding between pad and disc and thats what you are probably experienceing. It could even be a little bit of grit, something as simple as that.

Thats what my local garage man said, it would either cure them or kill them but its made no difference. The only thing I havent done is the light dragging at higher speeds just normally do this in the carpark after its been sitting. I've had all the discs and pads off checking for obvious things and used a flapper wheel on the drill to clean up the discs and pads which improved the braking but not the vibration.
Thinking about it now the way it feels slowing past 40mph its similar to how my last car felt with a seized piston and that would tie in with the car sitting for weeks at a time also its not consistant when the cars cold you barely feel it but if you've had a few quickish stops in a row then it can shake the steering wheel/car pretty bad, so bad in fact you can see the gear stick wobble with it.
I guess I could try pushing all the pistons into the caliper and see how easy they are to do so.

Thanks

Mike

Edited by cv8 mike on Friday 1st May 11:12

[wolfracer]

Mike, an inch or two of wheel turn vibration is not uncommon under these conditions.
Best you take it to a pro to assess your pistons, but I stil recco the friction pads - I tried the ***mph-10 mph cleaning and didn't work with normal pads, if anything they got worse with the heat build up.
A week later on friction pads and everything fine, I occasionally get a little vibration when hot but thats it...

[cv8 mike]

Well thats it, i've arranged with a local engineering firm to check and skim all four discs and I'm going to purchase some performance friction pads.

Gonna be a couple of weeks yet but i'll update with the results. Fingers crossed