I've read some letters in Drive in The Age over the past few months where writers say they've got benefits out of PULP by "tuning" their cars (various recent models) for it. Are there any current mainstream ECU controlled motors that can actually be "tuned" for different octane ratings and, if so, how? I thought anything with a crank angle sensor and/or no dizzy would prevent advancing the base timing. Apart from that there's nothing to fiddle with to "tune", but I'm still getting on top of 1988 technology so maybe later cars are different.