have anyone installed 264 intake /280 exhaust camshaft combo? I got them from vishnu but I don't know how to set them properly to achieve more power on middle or high end. rigth now they are set -4 intake -2 exhaust and the car feels good. any suggestions? my mods are

• Hks turbo back
• header (borla)
• Fuel rail
• 255 fuel pump
• Unorthodox pulleys
• Dual friction clutch
• Perrin test pipe
• Vishnu X-flash
• Samco intercooler hose kit
• O2 housing
10.5 turbo hotside
• Hks 264/280 camshafts

thanks