well in that case you will need to speak to who ever is supplying your stage 1 chip, I think MSD do a 165 chip so you would have to ask them what boost to set it at so it fuels correctly.

Hope this helps, might be work speaking to the following as well:

Sitech - 01796 481 495
Collins Performance - 01796 481 495
Oddkidd Creations - www.oddkiddcreations.co.uk
Norris Motorsport - 01773 836274