The use of a good knock sensor is the best way to detect knock....period.
There is no simple answer. Way too many variables. Compression, A/F ratios, ignition timing, intercooling efficiency, backpressure, turbo efficiency (which varies with airflow and boost pressure), hot spots in combustion chamber as simpler examples. To put it shortly, people write big thick books about this stuff. Takes a lot of math to come up with a definitive answer (even then there are uncertainties as some variables are just assumed). For the most part, tuners tend to just bump up boost until knock is detected then back off and/or try to tune it out. Just start out easy and work your way up to it. Jumping in head first unless you know what you are doing can be risky. Given all the potential variables, the last thing you want to do is base your decisions on the opinions of others.
ka-t 300 wrote: Bump . no body knows ? also has any one ever tried using octane booster 104 or somthing like that to up your octane for detonation prevention ? does it work or is it a gimmick ?
Octane boosters do bump up octane, but by an extremely small amount. Think about it. Consider the size of the octane booster bottle. Consider the amount of fuel in your tank. Do you really think its going to bump up your octane to any significant amount for that kind of cost? I'd be surprised if you even got a bump in octane of half a point.