Here is yet another question for the list. My 83 ur-q is detonating under boost at about 7 psi. The wastegate and computer are stock. The boost will go as high as 8.5 psi. I am running nothing but supreme fuel (92). This has been going on for about 6 months. I am getting tired of letting off the gas to save the engine. Once again your help is appriciated Jeff Hemmerlin 83 ur-q 95 S6