Relativamente ainda à questão dos Ranhurados vs. Perfurados
Quando mais leio sobre o assunto, mais me parece que é preferível ranhurados aos perfurados.
Acima de tudo quero travões bons, de performance superior aos stock, mas admito que tenha dado preferencia aos perfurados também por uma questão de look.
Pelo que vi, a optar por perfurados é bom que sejam de excelente qualidade, pois caso contrario podem dar sérios problemas.
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Many higher performance brakes have holes drilled through them. This is known as cross-drilling and was originally done in the 1960s on racing cars. Brake pads will outgas and under use may create boundary layer of gas between the pad and the disc hurting braking performance. Cross-drilling was created to provide the gas someplace to escape. Although modern brake pads seldom suffer from outgassing problems, water residue may build up after a vehicle passes through a puddle and impede braking performance. For this reason, and for heat dissipation purposes, cross drilling is still used on some braking components, but is not favored for racing or other hard use as the holes are a source of stress cracks under severe conditions.
Discs may also be slotted, where shallow channels are machined into the disc to aid in removing dust and gas. Slotting is the preferred method in most racing environments to remove gas, water, and de-glaze brake pads. Some discs are both drilled and slotted. Slotted discs are generally not used on standard vehicles because they quickly wear down brake pads; however, this removal of material is beneficial to race vehicles since it keeps the pads soft and avoids vitrification of their surfaces.
On the road, drilled or slotted discs still have a positive effect in wet conditions because the holes or slots prevent a film of water building up between the disc and the pads. Crossdrilled discs may eventually crack at the holes due to metal fatigue. Cross-drilled brakes that are manufactured poorly or subjected to high stresses will crack much sooner and more severely
Pelo menos no meu caso pretendo discos para estrada, e não para pista, por isso não há o risco de fadiga a curto prazo. Mas um gajo também tem que ter cuidado em não os deixar gastar ao nivel em que por vezes chegam os discos solidos, porque a tolerancia é muito menor.
Os meus discos já estão com 1.5mm de cada lado :S se fossem perfurados já tinham partido à muito, aposto.
Vou ler mais umas coisas e ponderar as opiniões de quem utiliza estas e outras marcas aqui no forum. Tenho é que me decidir rapido, pois tenho os meus mesmo nas últimas...
