Look what showed up at my house this afternoon.
The stock center to center mounting distance for the E21 brake caliper is 3inches?
Will the Mini One discs mean I have to re mount the Volvo calipers and will they then fit under 15'' wheels??
I'm struggling to see what the benefits really are with fitting the Mini One discs? It seems like a lot of work with minimal, if any, real gains.
Has anyone got these on their car now and is the braking much improved?
i read through all my resources on the week end and and couldnt find what i was looking for so its down to me drawing a triangulated brake circuit or i will have to ask round for it. it must have been in a book at trade school. pm me if you are interested or dont get it and i will make the effort to get it for you
Ed
Last edited by Beemer Tech; 07-26-2010 at 10:22 AM.
B Road Blaster
mini rotor:
Pros: more stopping torque (larger diameter rotor), better heat dissipation due to a larger rotor which means less fade for track use. Less work- no need to slot calipers,
cons: heavier rotor, cumbersome mounting, and need to use centric rings to center the rotor on the hub.
Do you think they'd fit under 15 inch rims?
Yes, they should but you need to check spoke clearance since they will move outward by almost 1". You could simply mount the calipers in that position with no rotors to see if they'll fit.
Cool - thanks
hey, i was talking to an old school racer the other day and volvo four spotters came up. apparently instead of running a T in the brake line you can pull the caliper apart and carefully drill the a 3mm hole at the back of two adjacent bores to connect them, then you can just blank the second inlet off. if that makes sense. this is what this bloke has been doing for years.
B Road Blaster
wow, that makes great sense. I'd just verify 3mm is the same diameter as the rest of the internal fluid passages.
I don't know how tight the rotor would fit on the lugs only, and this would really only work if you've done a lug stud conversion.
Hub centric rings would be the best way to ensure the rotor is centered on the hub, and they're cheap at about $25-$35 a set. Do a google search for hub centric rings. Motorsport-Tech is the company that I bought my custom hub centric wheel spacers.
The e21 rotor hub diameter is 63mm (not to be confused with the smaller wheel hub diameter), and the mini cooper rotor hub diameter is 64.1mm. Maybe that's a tall order to get something that thin. The bolt hole size is 15mm for the e21 vs 14.75mm for the mini.
on an interesting note, the mini rotor weighs in at around 12.18lbs compared to 12.25 lbs for the vented e21 rotor.
I have a question. Is it beneficial to have the inside of the rotor hub machined so that the spacer is more than 1.1mm thick? That doesn't sound particularly strong. 2-2.5mm maybe but 1.1mm. I am looking at a front and back disk brake setup currently and this mini rotor setup with volvo girlings sounds mint, but that spacer thickness worries me. Good to hear you don't have to slot the rotors for this setup though, that would be hell to pass the uninformed police who patrol Australia looking for people to pick on.
Cheers potential replier.
"The most important thing is balance." - KT
I make cool things for your car.
BMW and Fiat Performance Parts
I also drive italian cars, or own broken ones anyway.
cool, thanks Jason. For future reference, how much would you want for a set of 4 rings, 63mm x 64.1mm? I have no immediate plans for them, just curious.
Last edited by EFreak; 09-30-2010 at 12:32 PM. Reason: Automerged Doublepost
I have my e12 master cylinder installed and a second set of hard lines ready to be installed (waiting for dual hard line mounting clips to be shipped). I have a question:
Someone Please answer this for me...
Does anyone see a problem with me running braided stainless lines directly from the hard line coming into the wheel well to the caliper?
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Some pictures of the e12 MC, the lines connected up and one of the clips installed...
Last edited by switlikbob; 12-04-2010 at 03:34 PM.
I'm having Jason mill up a set of centering rings (needed to run the larger Mini rotor, and not available commercially) for me. While he is has it setup, he will make up a few extra sets. Cost will be approximately $30/pair shipped in the US. Please let me know if anyone is interested.
Last edited by Jester323; 03-25-2011 at 06:16 PM.
Jester...look at my pics above...those are the speed shop dual hard line mounts I was telling you about. You have to supply your own washer though.
Jester, I'm interested in a pair of centering rings. Email sent too.
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