I have a Turbo Busa fitted to the rear of my Austin Mini car. its running 0.7 bar (10psi) boost. On a recent track day, after 6 laps the engine struggled to rev past 7000rpm (10,000 easily prior to the issue). Any ideas as to what's wrong with it? My thoughts were plenum popping off then getting sucked back down again or fuel pump as fuel pressure was showing 3 bar. It has a Bosch 068 pump fitted and the fuel line from tank to pump are 7/16 (11mm) and 8mm from pump to engine. was thinking of swapping to the 044 Bosch pump.
Last edited: