Wanted: N75 Boost Control Valve etc

[Andy10v]

Originally Posted by geneandbolly

erm . . .

funny you should say that as i noticed what we used to call in the old ford days, "pinking" when i gave it full boot . . .



does it really make a huge difference? checked the s6 handbook and right enough, it does say to use the high octane stuff . .

Yes it makes a difference. The ecu has knock detection, so you can run both, but with a power loss on lower octane. When the ecu detects detonation it will pull timing/boost (another reason you dont want a bleed valve as then ecu cannot lower boost, only pull timing when it detects knock).

You also notice the difference if you get a batch of bad fuel, depending on how the fuels octane has been raised (e85 or octane boosters?) it can go off, so some sites are better than others depending on turnover.