Standard Wheels. Big Brakes. A pictorial.
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Here we go. I used a big allen key, a 19mm socket, a pair of Hi Spec R-132 calipers, Hi Spec brackets for Cossie hubs and a set of Ferodo DS3000 pads. It took about 45 minutes for the first side and 15 minutes for the second side:
1. Original wheel with standard 2WD caliper
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2581.jpg)
2. Wheel off to reveal newish disc and standard caliper
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2583.jpg)
3. Disconnect old brake line and attach new braided line
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2585.jpg)
4. Remove original caliper and compare to the HiSpec R-132 to see size difference
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2587.jpg)
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2592.jpg)
5. Compare standard size pads (above) with pads for R-132 calipers (below)
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2589.jpg)
6. This bracket mounts the caliper to the hub
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2596.jpg)
7. Turn the steering so that you can mount the bracket
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2593.jpg)
8. Bracket on
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2598.jpg)
9. Mount the caliper to the bracket
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2607.jpg)
10. Attach the braided line
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2610.jpg)
11. Put the wheel on to discover that it does fit but only just and I had to take the wheel balancing weights off the inside. Not sure what to do about this at the moment.
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2613.jpg)
12. Go to the kitchen. Original Cossie caliper with pads weighs 5.3KG (scale has gone right round past zero)
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2615.jpg)
13. Hi Spec brackets and DS3000 pads weigh 1kg
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2616.jpg)
14. Hi Spec calipers weight 2.5kg
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2617.jpg)
So there you go. I haven't raced on them yet - first race is in June - but they should do the business and they fit under standard wheels. It saves 1.8kg per wheel in unsprung weight, gives you a bigger braking surface area, should diffuse heat quicker and didn't cost too much.
Charlie
1. Original wheel with standard 2WD caliper
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2581.jpg)
2. Wheel off to reveal newish disc and standard caliper
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2583.jpg)
3. Disconnect old brake line and attach new braided line
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2585.jpg)
4. Remove original caliper and compare to the HiSpec R-132 to see size difference
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2587.jpg)
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2592.jpg)
5. Compare standard size pads (above) with pads for R-132 calipers (below)
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2589.jpg)
6. This bracket mounts the caliper to the hub
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2596.jpg)
7. Turn the steering so that you can mount the bracket
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2593.jpg)
8. Bracket on
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2598.jpg)
9. Mount the caliper to the bracket
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2607.jpg)
10. Attach the braided line
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2610.jpg)
11. Put the wheel on to discover that it does fit but only just and I had to take the wheel balancing weights off the inside. Not sure what to do about this at the moment.
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2613.jpg)
12. Go to the kitchen. Original Cossie caliper with pads weighs 5.3KG (scale has gone right round past zero)
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2615.jpg)
13. Hi Spec brackets and DS3000 pads weigh 1kg
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2616.jpg)
14. Hi Spec calipers weight 2.5kg
![](http://i32.photobucket.com/albums/d37/charliemoseley/IMG_2617.jpg)
So there you go. I haven't raced on them yet - first race is in June - but they should do the business and they fit under standard wheels. It saves 1.8kg per wheel in unsprung weight, gives you a bigger braking surface area, should diffuse heat quicker and didn't cost too much.
Charlie
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Charlie
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I'd like to try a Sharktooth alloy and a 3 door alloy sometime to see if they go over the brake calipers. Anybody near Surbiton have a wheel they fancy bringing over one day? No hurry.
Also if anybody fancies weighing a sharktooth alloy and a 3 door alloy (without tyres) I would like to know what they weigh. Lattice is 9.1kg.
Cheers,
Charlie
Also if anybody fancies weighing a sharktooth alloy and a 3 door alloy (without tyres) I would like to know what they weigh. Lattice is 9.1kg.
Cheers,
Charlie
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I do alot of wheels for race cars at work, some people have to have them perfect, others dont have them done at all.
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It depends how far out they are, with good quality tyres its usually not too bad, but if you do get one a long way out, you will probably notice it, it doesn;t bother some people, others hate it.
I do alot of wheels for race cars at work, some people have to have them perfect, others dont have them done at all.
I do alot of wheels for race cars at work, some people have to have them perfect, others dont have them done at all.
Charlie
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You will stand more chance of noticing with poly bushes that's for sure, on my old sierra with solid bushes in places a build up of dirt on the inside of the wheel could be noticed, personally it annoys the hell out of me.
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did a car the other day that had lots of crap in the back wheels, they where over 200 grams out, cleaned the crap out, they came down to about 30 gram's!
Had it on my escort van, was so bad i thought the thing was going to fall apart (some more).
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On my wheels, DS OPTICS, the dirt was just a slight ridge that built up on a seam, but when measured as out of balance it was over 15 gramme, cleaned the wheels as they were when fitted with weights, and less than 2 gramme.
tabetha
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I note that theres bleed nipples top and bottom , i guess that these can be used trailing or leading then , if thats the case and they dont have Differential bore pistons you should be prepared for Wedge shaped brake pads and frequent replacement charlie !
.
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Good write-up Charlie - looks like a cheap upgrade if you want to stick with std size wheels 15" - shame about the balance weights though - mine always need doing as i have poly TCA bushes.
Look a good upgrade for bigger wheels as well
Look a good upgrade for bigger wheels as well
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Charlie
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Spoke to Hi Spec who were very helpful and warned me about potential problems with heat dissipation. I may need to think about adding ducting and we had a good conversation about surface area, disc width and increased numbers of vanes in the discs.
Anyway, the smaller piston needs to lead so each caliper has the smaller piston at the bottom and the larger piston at the top.
Geoff at Hi Spec also suggested a higher temp pad than the Ferodo DS3000 - a pad from Performance Friction which I think is an American outfit. I may try these later in the season if the DS3000 struggles to cope. All this to come.
Charlie
Anyway, the smaller piston needs to lead so each caliper has the smaller piston at the bottom and the larger piston at the top.
Geoff at Hi Spec also suggested a higher temp pad than the Ferodo DS3000 - a pad from Performance Friction which I think is an American outfit. I may try these later in the season if the DS3000 struggles to cope. All this to come.
Charlie
Last edited by Char1ie; 05-05-2009 at 09:09 AM.
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Spoke to Hi Spec who were very helpful and warned me about potential problems with heat dissipation. I may need to think about adding ducting and we had a good conversation about surface area, disc width and increased numbers of vanes in the discs.
Anyway, the smaller piston needs to lead so each caliper has the smaller piston at the bottom and the larger piston at the top.
Geoff at Hi Spec also suggested a higher temp pad than the Ferodo DS3000 - a pad from Performance Friction which I think is an American outfit. I may try these later in the season if the DS3000 struggles to cope. All this to come.
Charlie
Anyway, the smaller piston needs to lead so each caliper has the smaller piston at the bottom and the larger piston at the top.
Geoff at Hi Spec also suggested a higher temp pad than the Ferodo DS3000 - a pad from Performance Friction which I think is an American outfit. I may try these later in the season if the DS3000 struggles to cope. All this to come.
Charlie
If you have to run a 15"rim can you find a std version with a more "open spoke" design , this will aid airflow before you start buying Donkey Dick for it ??
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Donkey Dick?
Thanks for your input Tony![Wink](https://passionford.com/forum/images/smilies/icon_wink.gif)
I won't change anything for a while. Was speculating about the pads and ducting for future use.
I have considered lighter more open wheels. Next race is in June so I'll see how I get on there with what I have.
Charlie
Thanks for your input Tony
![Wink](https://passionford.com/forum/images/smilies/icon_wink.gif)
I won't change anything for a while. Was speculating about the pads and ducting for future use.
I have considered lighter more open wheels. Next race is in June so I'll see how I get on there with what I have.
Charlie
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