ignition cut out...on turbo car?
But for an auto it would be pointless, and for a conventional manual synchro car...again a total cut perhaps isnt the best way forward.
Some form of low rpm limit ( basically a 2-step as you guys call it ), invoked when the clutch pedal is enganged would be best.
Obviously wiring in a total cut would be extremely easy, and almost free. Just kill the power feed to the coils. Although doing so could also throw fault codes ??


