I have just bought a 1989 2wd sapphire cossie - i've had a 4x4 but always had a bit of a hankering of a 2wd. Anyway, I've found what I thought to be the best of all the ones i've looked at.

There is one problem with it, and that is on full boost there is a puff of smoke out the exhaust. It boosts fine - just one puff then its fine. Its the same everytime I floor it.

Any idea what it could be? I'd guess some sort of oil seal?

Its a stage 1 if that helps.....