Quote:
Originally Posted by Jay-ZS+
I'd favour the dimpled discs over the drilled as the dimples still help to vent the brake gasses, but disperse the stress and heat concentration better than the drilled holes.
Although on a road car think the grooves and holes are more for looks rather than performance. Would have to really be hammering the brakes on the roads to notice the difference.
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I tend to agree with you there. For normal road driving drilled and groved discs look good and perform well but for motorsport on a budget they are not so good. Obviously if you can afford to replace the discs for every race then there are performance gains to be had!! Vented discs will generally suffer from heat stress cracking less than solid discs but i'v seen them crack too. Oddly the more holes that are drilled the less likely they are to crack?? Look at some Porsche discs, they are almost more holes than disc!!