Don't want to be rude but i would take it to a tuner. I know there not easy to find but still these guys know quite what to look for. Less chance of something going wrong. Also going to a tuner will pull up your own experience if you stay with it and ask what are they changing and why


For the det cans you shouldn't use them on idle mate. Try some youtube vids or sg. There must be more info. Also have a look on what detonation is and what causes it

Detonation is self detonation of the fuel. Its no burning like normal. Causing extreme heat and pressure rises peaks. This will cause lil deformation on the piston on low det and complete holes when its going hard.

Det is caused by high pressure and high temps. The resistance against det is caught in the octane number. If its higher (98 over 95) it will be better resistant. This is one of the reasons why its more expensive. The rs turbo has no automatic ignition adjustment as some cars have so chancing on a set up from 95 to 98 doesn't make much difference. From 98 going to 95 can cause that we get detonation.

So what a lot of people do is set up on 95 close to det and then drive 98 and you are safe! So back to you. As said det is high pressure and temp. At idle listening to det is a bul*****. So what you do is you take the det cans (i never used one or seen one irl) drive and increase till you hear a metal high tone sound. This is detonation. You wil have too much advance. If you later increase boost or adjust fuelling det can start again. Don't stay to close to det if you drive your car a lot, best to go for a safer set up then.