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TKART magazine Tech Focus | STR V2: the new brake system by IPK
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Max Bernardi
14 March 2018
In the shifter categories, lap performance can depend largely on the efficiency and quality of the brake system. With this in mind, IPK worked long and hard to optimize its STR V2. We analyse the new 2018 homologation, which goes alongside the RBS.V2 model for the non-shifter categories
To obtain the result the IPK technicians set out to achieve, the design of the new brake system was oriented toward a front calliper with four pistons, 2 more than the previous version. From the study phase and after the first 3D designs, the process shifted to prototyping, taking advantage of a 3D printer , a tool of the highest technology that speeds up this process and makes it possible to refine the modelling and verify the real size of each part.
The actual calliper is completely machined from a solid through C.N.C. processing of a block of aluminium. It’s then anodised to attain its final colouring.
All the components of the rear calliper of the STR V2 brake system
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As mentioned, the principal characteristic of the calliper is the four pistons, each with a diameter of 19 mm. Their surface is characterised by grooves studied to improve ventilation and, therefore, cooling. What’s more, these channels facilitate the removal of dust generated by the contact between the brake pads and disc.
Compared to the previous version, the new calliper makes it possible to use larger pads; that, along with the 4 pistons, has allowed for an increase in the push surface of the brake pad. On the practical side, this choice turns into an advantage both from the standpoint of braking power, and flexibility: the 4 pistons, in fact, exercise a more even force on the pad, reducing the problem of brake discs locking, and increasing driver sensitivity in braking. The greater evenness also allows for increased grip when entering a turn, an important characteristic when you’re looking to maximise performance.
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The calliper is machined from a solid through C.N.C. processing of a block of aluminium
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