cheers rab, no smoke on over or on/off boost. only on initial startup, when engine is up to temp. havent tried from a cold start yet. i thinking valve guides or poss a breather related issue. car is vented to atmosphere atm, may try plumbing it up the oe way. i saw someone develoip a similar issue AFTER venting to atmosphere and when plumbing back via metering head, the problem went away!! odd one but with try it i think.
https://passionford.com/forum/ford-e...w-smoking.html heres the other guys thread