Front Brake Discs

[Ireland]

The front RHS of my car judders whan I brake hard.

I've had the wheel off and there is a very slight warp in the disc.

I've been doing the search on here and the best I can come up with is that they are the same as either Tuscan discs or Aston Martin discs.

So, does anyone know what the discs off the front of a Tuscan are?

Also, if they are the same as Aston Martin, that probably means they are a Ford part.

The "equivalent parts" thread doesn't have it on there for definite yet so any help would be appreciated.

[neil0205]

i was told by Automedian they are sierra discs,call them and they will confirm.

[ireland]

neil0205 said:

i was told by Automedian they are sierra discs,call them and they will confirm.

I've heard that alright.

I'm just trying to confirm before I go and get some discs.

[jon h]

I would be surprised if the disks were Sierra. For a start, the hub has 5 wheel nuts and the Sierra has 4, I think. The Griff/Chim front disks are a ford part, I think, but the Tuscan & Cerbera uses AP callipers and AP disks I believe. Having said that, when I bought some EBC green stuff pads, the front pads were labeled TVR/Aston Martin. I assumed that the Aston uses the same, or similar, AP callipers. Mind you, same pads does not mean same disk. The Cerb rear pads will fit a Mini front calliper, I believe, but I don't fancy my chances with mini disks!

Jon

[gazzab]

Do you have the discs with separate bells ?

[Ireland]

This is one part that has escaped on the "equivalent parts" section.

[brummiewedge]

Chims and Griffs ARE the 4 stud Ford variety. but not so the 5 stud on the Cerb, If it was ford it will be Granny i reckon.

[Steve_T]

Tuscan S discs are a one piece replacement. This is probably the cheapest option that gives you new discs. If you have the original bell and rotor combination, you should be able to get replacement rotors. You need to get a rotor with the same bolt spacing, and disc offset, so the disc lines up in the caliper. I don't know how much room there is for a thicker disc.

I had a chat with the guys at AP regarding options on the Cerb's brake setup. Apparently their strap drive system is having good results on scoobies and evos, which run a similar 320mm size disc and have problems with warping because the overall disc is relatively small. This is genuine warping caused by high temperatures and not just pad deposits. The AP strap drive system gives the same float as a regular fully floating disc, without the the noise of the bobbins rattling and so on. There'd need to be a reasonable number interested in an upgrade to strap drive to make it viable though.

Steve.

[Steve_T]

brummiewedge said:

Chims and Griffs ARE the 4 stud Ford variety. but not so the 5 stud on the Cerb, If it was ford it will be Granny i reckon.

If wasn't Ford Sierra on the Cerb, only on the Chim and Griff. The Cerb is AP only, hence the prices of replacement parts!

[Ireland]

Steve_T said:

If wasn't Ford Sierra on the Cerb, only on the Chim and Griff. The Cerb is AP only, hence the prices of replacement parts!

Yes.

A great reason to try and source them sooner rather than later.

[ridds]

Steve_T said:

Tuscan S discs are a one piece replacement. This is probably the cheapest option that gives you new discs. If you have the original bell and rotor combination, you should be able to get replacement rotors. You need to get a rotor with the same bolt spacing, and disc offset, so the disc lines up in the caliper. I don't know how much room there is for a thicker disc.

I had a chat with the guys at AP regarding options on the Cerb's brake setup. Apparently their strap drive system is having good results on scoobies and evos, which run a similar 320mm size disc and have problems with warping because the overall disc is relatively small. This is genuine warping caused by high temperatures and not just pad deposits. The AP strap drive system gives the same float as a regular fully floating disc, without the the noise of the bobbins rattling and so on. There'd need to be a reasonable number interested in an upgrade to strap drive to make it viable though.

Steve.

Does look good but also VERY expersive.

[jonny tvr]

get them skimmed. costs around £70. I had it done on both my cerbs and had no problems after that, but they are well known for warping.

[trackcar]

I contacted AP about their strap drive early last year when i first heard about it, but they were reluctant to do anything for me either then.

Which route you go depends on several factors : the caliper you are using (tvr used at least 3 versions) and the wheels you are using.

call me if you want to discuss the (many) different alternatives on front discs, it's a bit of a mine-field if you don't know what fits what ...

[gazzab]

Try a breakers and get a pair of 2-piece 4.5 discs. You can remove the discs from the bell and replace with AP 330mm discs. I think you need 32mm thickness, maybe 28mm would work too. The 4.5 caliper can take up to 32mm discs though (I dont know about the 4.2 caliper). Get a new set of fixing bolts that fix the discs to the bell, as the standard ones use an unusual hex size. The discs are bigger, you will need to space the calipers outand get some custom made aluminium spacers. You'll need to buy caliper mounting bolts 4mm longer. The new discs are around £200 each, the old discs + bells around £100 from breakers, spacers not much at all and bolts the same. The easy way to do it is to buy Joolz/Trackcar's kit as it will have everything you need though.

[Steve_T]

Can you go larger than 330mm Gary?

[gazzab]

I dont think so but I am not an expert. I have the old bells from my car BUT I have the drilled tuscan brakes! I had to get some brake discs and pads fitted the night before Le Mans in 05 and so had to take what they had in stock at Raving Queens.
Also - I dont think the original discs from the 2 piece set up can be skimmed.

[Ireland]

I did think about the skimming option.

Is it really a success as a short-term fix?

[byker28i]

Just for future reference. Are these just TVR parts to get from TVR Power or are there other suppliers?

[jonny tvr]

I think sometimes we can be too precious about our TVR's, I have done skimmimg twice on my old Cerberas and I noticed no difference over a year until I sold them. Remember you could replace them and have the same problem of warping 12 months on.

[gazzab]

But you can only skim the 4.2 brakes and not the 4.5 (sep bells) ones.