79 replies to this topic

[FLD]

Vauxhall did an uprated disc option that was a lightweight disc. Stock dia though. Not sure of the weight but a search might dig up something.

[Tony H]

sh*t the bed $350 a disc!

[Exmantaa]

sh*t the bed $350 a disc!

try seriously lotus for their 308mm discs...

[Tony H]

sh*t the bed $350 a disc!

try seriously lotus for their 308mm discs...

£340 for a one piece disc! Now I've seen everything!

[Ormes]

Eurocarparts saab 9-5 aero 308mm... £40ish each but 8.5kg

[Doctor Ed]

Anyone know if any of the 1pc 308s vent from the inside of the hat? Pretty much every one I've seen vents from the outside face. Also, might be exxy, but to their credit, the tesla discs are very nice. Really big directional vanes, and no unnecessary fat. I think their weight for a 1pc says a lot.

[Aerodynamic]

Isnt the Testa and Lotus more or less same design but with different bolt pattern and diameter? Br, Per

[Doctor Ed]

the rotors (that i have) are of entirely different design*

 

curved vane directional/side orientation vs unidirectional straight vane

thinner walls, fatter core

smaller overall braking disc area, greater hat diamater

and as mentioned, internally vented vs externally vented

 

*(im not sure what the origin/brand is of the 308mm vectra rotor is)

 

Edited by ed.oates, 17 January 2016 - 09:30 PM.

[Arno]

Tesla discs are the same design as the Elise discs with the large air gap and the thin(ner) wear surface.  (AFAIK made by EBC in the UK for Lotus)

Elise S2 288mm discs are around the 5.8-6Kg mark too and were used as an optional upgrade on the VX turbo in 5-bolt cross-drilled form (and quite expensive at the time!)

 

Opel/Vauxhall discs as used on the Speedster/VX/Astra/SAAB/etc. are  the 'narrow vent' type with much more massive wear surface and as you noticed a lot heavier as a result.

 

Bye, Arno.

[2-20]

There is also the 308 mm disks from the Europa Se. Seriously lotus has or had them but the price was extorsionate

Edited by 2-20, 18 January 2016 - 01:50 PM.

[Doctor Ed]

I've rung the local tesla dealer today for a price and availability. It's a weird service system they have there. Anyway, he's ringing me back. Ideally I'd like to run 310 front and back. Running the standard front and rear calipers, it'll result in exactly zero change in bias over stock.

Edited by ed.oates, 18 January 2016 - 02:17 PM.

[Exmantaa]

Ask him for the rear uprights too...

[Nev]

You could also consider Alfa 159 discs, there are a variety that fit our exact stud pattern. I currently have 330mm x 28mm Alfa discs on the front of my car, they are heavy (around 8 Kg from memory) and have a huge amount of meat on them (that could be machined off if you wanted them lighter), but this means I will likely never need to change them. My discs cost £15 each - yes really !

 

More info here: https://sites.google.../07---update-29

 

I converted my front brake setup to Porsche 4 pot Brembos + Alfa 159 discs + M12 bolt conversion + spacers for a total cost of just £340 as budget was key for me; what is your budget for your whole project ?

 

 

 

 

Edited by Nev, 20 January 2016 - 08:10 AM.

[Doctor Ed]

Heya Nev,

 

I read through your Porsche/Alpha setup a while ago - isnt it neat when it all just slots together

 

that said, its a step further than Im prepared to go at present. In particular, Im going for the 'no adapter' Approach, as Ive got a bunch of other things i Need to sneak through TÜV and I dont want to get hung up on stuff like the brakes when I can avoid it.

 

Ive been thinking about it the last couple of days... Im tempted to just run the setup exactly as ist done on the Tesla. 300mm front, 310mm rear, Standard calipers all round (i ended up buying the Tesla front calipers). theres lots of possibilities to change things incrementally (ie 310 or 320 front) but given the general tendency to try and increase the rear bias a notch anyway, i think itll be interesting to see what a relative rotor increase on the back does.

 

the telsa has a significant rearward weight bias in comparison to say an elise:

 

tesla: 34:66

elise: 38:62

 

so the brakes obviously have a bit more rear bias. plus its a good 3-400kg heavier overall.

 

*shrugs* Ive got all the parts here, it all bolts up, ist all quite light, and its a significant improvment over the stock brakes, which alone arent terrible anyway. Ive got some DS2500 pads sitting here, and all in all, it doesnt strike me as a bad setup.  

[TFD]

So the 300mm front discs are a 100% fit as well? 

300mm disc that shave a good kilogram a corner of unsprung weight seems like a good idea.

Cant find a supplier atm though.

[TFD]

Ah right... $300,- a corner....

[TFD]

Client of mine drives a Roadster. He's checking things out now. He thought it was a 300mm brembo disc. We'll see what he comes up with.

[Doctor Ed]

id be interested in some extra discs if theyre not absurdly expensive. Tesla dealer in Hamburg has gone quiet

[2-20]

 

 

sh*t the bed $350 a disc!

try seriously lotus for their 308mm discs...

£340 for a one piece disc! Now I've seen everything!

 

No £340 is the price for the lotus ones. The 5 studs ones are £770 each

 

[color=rgb(51,51,51);font-family:Arial, Helvetica, sans-serif;font-size:12px;]Europa/VX220 5Stud -SPECIAL ORDER [/color]+£347.27 (+£416.72 Incl. Tax)[color=rgb(51,51,51);font-family:Arial, Helvetica, sans-serif;font-size:12px;] [/color]

[TFD]

Not the Tesla ones but found some other rotors as a good replacement I guess:

 

http://www.mijnautoo...77203/remschijf

 

Front disc of the Vauxhall (Opel) Signum 1.8 Z18XE

 

285mm (3mm shorter than OEM)

5x110

25mm thick

42mm height

6.7 kg each = 0,5 kg lighter than OEM