Oops, here ya go...

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

Thanks Mick.

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Steve

No probs, just keeping it current. Keen to see how you have done the brakes.

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Steve

Got mini club meeting in two nights. Might get the moke up on jacks

Okay, the brakes have arrived and the conversion has been done. Just so that we're all talking about the same thing, these are the brakes I have (spot the new parts):



which came as a kit to be bolted to the 8.4" hubs --> http://www.minisport.com/mini-spare-parts/Mini_Sport_7.9_Vented_Brake_Caliper_Kit.html

Now, as to the question of what wheels will fit:

S rims (Dunlop LP883) - No
Dunlop LP922 5x10 - No
ROH Contesta 5x10 normal (SS) offset - yes, BUT any balance weights on the inside of the rim will probably foul on the calipers.

The difference between the inside diameter of the Contesta and the Dunlop is probably 5mm or less (around 205 - 210mm) so maybe the shape has something to do with it. The Contestas I tried were probably a mid-70's model although I can't remember whether they were the ones that were actually on my SS or not. One wheel had no balance weights and that was fine, another had them right up against the back of the spokes and they scraped on the caliper and the third had the weights in the middle of the wheel and they also scraped on the caliper.

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66 Deluxe, 07 Cooper

Sigh... I'd love to give these a go just for fun on stock rims..

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

paul_ewins, couple of questions if you don't mind

are you running a booster on those?
hows the stopping ability with these?

does anyone know if ultalites fit over those?

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1978 Leyland Clubman S

So dont have photos yet... was raining and didnt feel like getting wet .
But our rotors are turned down and we run metro 4 spot calipers

I didnt think you liked those brakes soo much

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77 mini sunshine: the slow build continues
http://www.ausmini.com/forums/viewtopic.php?t=70699

Nope, no booster. I've never needed one on a road car. It would take a lot of rearranging to find room under the bonnet for one so I'll avoid fitting one if I can.

The stopping ability is fine but I've no way of making a meaningful before and after comparison. Theoretically the four pot calipers should do a better job than regular calipers and the vented rotors should be less likely to overheat, so the new setup should hopefully perform better than the old 8.4" brakes and should definitely be better than a rebuilt set of 7.5" S brakes or a 7.5" conversion with solid rotor. But anywhere other than a racetrack they're unlikely to be tested to their full potential. Maybe they are overkill, but since the price was the same for all options I decided to aim high.

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66 Deluxe, 07 Cooper

thanks for the answers!

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1978 Leyland Clubman S

that's excellent - vented...

Correct me if I'm wrong - your drive flanges are "normal" 8.4" flanges, not the "Metro Turbo" type which are at least a couple of mm thicker (if anyone has the measurement, please post it!)

The extra thickness of the metro turbo flanges moves the wheel further out, so will give more clearance for the wheel....

So, if you were to put a couple of washers on each stud (to simulate the wider flange - obviously for measurement only!!), would an 883 or Dunlop fit?

Simon, what I've found with drive flanges and vented brakes:

The stock vented 8.4" diameter rotors will not fit behind mini (solid disc) drive flanges. They will clash with the upright.
The Metro drive flanges are often machined on the outside edge and front to take off the excessive diameter and the wheel-centring castellations. Mine are machined like this. You also see some cut down with a grinder

The Metro drive flanges have the split conical washer under the nut sitting below the wheel-mounting face by a few mm. The solid, mini drive flanges have the conical washer outside face sitting outside of the wheel mounting face. The total extra track width per side is about a quater inch, 6mm.

When using metro flanges with metro vented rotors, there is sufficient space between the disc and upright to space the disc inboard about 3mm as I have done in the photo below. I also spaced the caliper so the disc is in the centre of the caliper. This pushes the caliper in so it doesn't clash with the wheel spokes on my Sunraysias.

It is possible to use modified metro vented discs with mini drive flanges but the top of the top-hat must be machined down. That is the mating surface between the disc and the drive flange. This is ok because that portion is very thick and you can take enough meat off while still leaving enough thread depth for the mounting screws that hold it in place. You must use shorter screws so they don't hit the bearing seal at the end of the upright. I can't remember the exact amount that needs to be taken off. I suspect this is what is done with these discs pictured above. They've had the diameter reduced and the top-hat machined down. (or they are custom made)

If you use vented discs with the stock drive flanges, then you have no wiggle room to space them back as I have done with metro flanges. You do get to keep the correct track width though.



M

To be honest I don't know which type of flange since they were on the car when I bought it. I've got a super thin spacer somewhere that I can try when I get a few minutes and we'll see if it makes a difference. I've also been offered a few other rims to try so hopefully there is one that is a no-fuss fit and easy to find.

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66 Deluxe, 07 Cooper

thanks a lot Mokesta, that's exactly the detail I was looking for. I see your spacers there, great stuff

Paul, going by what Mokesta said, you do have the standard 8.4" mini drive flanges, as the split washer is sitting proud of the flange.

It would be interesting to see what difference some spacers (as per Mokesta's setup) would make to the range of 10" rims that can fit. Very interesting indeed

sgc and I once tried my alloy LP883 copies over his non-vented minispares 4 pot calipers - they almost fitted, but almost isn't good enough