what is it with the exhaust gases when on rr or hard build up of revs? i've only been to one rr day and noticed there was puffs of smoke every ten seconds or so coming out the exhaust. then, since then, i seen a video of a escort cossie racing up the drag strip against a motorbike. as it sat with the revs at same height, the puffs of smoke appeared again. it isn't as though it comes at a rev of the engine and then lift off and it appears, but when revs are either constantly, slowly building up or building up hard. anyone know where i'm coming from???