Front knuckles rebuild
As you already saw it in my previous articles braking power and endurance is not the top characteristic of a CRX. After attempts and mainly the track test of a full front ITR brake swap (282mm) … I had to move on another solution because vibrations problems still exists. They appear later, but they exists …
The excessive extra-weight added by the ITR setup is also a big concern. So here are some required specifications for the new setup :
- Big ‘everything’ for longevity and air surface contact to evacuate calories.
- Floating system … a real one. Not just rotors bolted to a hat.
- Light calipers.
- SHOULD BE MOUNTED UNDER 15″ WHEELS
- I don’t want to use 20mm spacers to fit everything
So so so … an idea for me please ? Nobody ? Hello ? ^^
The first decision was to get rid of the entire front VTEC knuckles and ITR setup. For 2 reasons :
- My original knuckles are lighter
- Mounting hears will be closer to the hub axle. This will help fitting everything under 15″ wheels.
Then let’s go for a knuckle rebuild as this one have more than 220.000 kms on the cluster ! Brand new extended roll center adjusters and new ball bearings.
Knuckles received also brand new extended ARP wheel studs. Here is a nice rebuild knuckle to start all measurements and 3D work for the brake setup …
New upper ball joint. The last remaining ball joint on the knuckle – the steering rack one – will be also replaced by a new one.
Homemade Brembo big brake kit
Some hours of measurements and CAD design later … my friend Alain tells me that my custom designed hat are ready !! Nice parts !
They are machined into a high grade aluminium alloy and receives the set of rotors shown on the picture.
They are fully floating (both in axial and radial direction) mounted rotors from STOPTECH. 282mm for the diameter and 28mm for the thickness. It’s the reference for NA1 Honda NSX.
When checking hat and rotor assembly, I was not really happy to discover how the two parts are positionned together.
There is no way for the air to go ‘in between’ the two elements and I sent back hats for some machining. You can see the added grooves between each holes.
With the rotor installed, you can see that those grooves will help having an air circulation between the inside and outside area of the disc.
I had a great opportunity to buy a brand new set of BREMBO calipers and it was not possible for me to miss it. They are really light and are originally mounted on CLIO RS of the 3rd generation. Pistons have dust seals for a better protection and you can find a lot of different braking pads for those one. A good deal !
All bolts and nuts comes from a specialized shop and have a higher quality grade. It’s not cheap but for the brakes, this is worth the price !
Go have a look at the end of this page, you’ll find my 3D files availables for DOWNLOAD !
Clearance between calipers and 15″ wheels is ok but I’m using 5mm thick spacers for track purpose.