Many currently designed hyper-sportscars that are designing their engines in-house, choose to ignore conventional construction methods concerning the engine block.

Caparo and Melling (anyone know other manufacturers?) currently use a solid piece of aluminium and then grind it (is this the right word?) in order to shape it into the final engine block.

This construction method is used for racing cars, as it provides increased rigidity to weight ratios for the engine block, compared to conventional methods. On the downside, this construction technique cannot be used for mass production as it is really expensive: engine block output per hour is really low.

Anyone know any more info on this topic? Maybe some links? I googled it but I guess that I am using the wrong terminology as I can't get any results