You might like to have a look at this
Engine performance tuning comparison - Dyno-Plot
You can see the cams allow the engine to keep on pulling at the top end (look at both curves are up over 7250rpm). The cams are like the A3 Toda items but are commissioned by Maidstone Sports Cars in the UK by a local company and are beautiful - Clockwise in the UK do these
http://www.clockwisemotion.co.uk/ima...-camshafts.jpg You do not notice any change to the engine at all - still silky smooth at tickover!
