Originally Posted by
kidsRS
I think i had problems with my zvh sump when on track at ford fair last year, my car started smoking its absolute cock off when i was tanking it round track thought id fucked my turbo, but when i set off home it cleared and was fine never had a problem since??
Where is your oil return? Could have surged back up and kept the oil in the turbo for too long and bypassed a seal briefly with the pressure build up? Stab in the dark entirely!!