Im new the whole turbo Buick scene. I recently purchased a nice low milage 85 GN and installed an Alky Control kit with turbo tweak chip. On my first test drive with everything else stock and unchanged, I had an explosion in my intake which pretty much destroyed the turbo and caused a major oil leak which I have yet to dig into and identify. I limped home about a mile and haven't had the time to dig in and do much checking yet. The leak is at the front for the engine and Im suspecting the intake gasket is blown out and the oil must be coming through the turbo seals. The detonation happened at half throttle. I had been running at around 12 lbs boost prior to this and didnt change anything else. The car ran nicely on 93 octane with a TT chip, but was just a little doggy. Probably I should not have driven yet without a data logger and due diligance- however I got impatient and did it anyway so here I am. I am planning to have the heads ported and install a champion ported intake with Works turbo upgrade along with fuel pump/wiring and supporting mods. Before I dump a bunch money into fixing/ upgrading, I want to have a better understanding of what caused the problem- has anybody had this happen out there?