to clarify my earlier post ;
In 'normal driving around town what i get is a Deeep waaaaah sound from the sc at low rpms increasing in tone in higher gears and then screams like jet with the increasing rpm. Its all the way to 6349 rpm in my little beast. (scaring or amazing all those within earshot ..quite a way haha) there is no delay jerk or anything , apart from being pushed back in the seat .
Anyways, I thought the SC engages at 1500rpm not 2900 ?