[Mike PCar]

I’m in the beginning stage of building a 911 2.7L engine and have narrowed down my options. Either CP 9.5:1 Pistons and a DC-30 Cam or Mahle 8.5:1 RS Pistons and an E Cam while using Weber 40's. I have read that the higher compression can cause “sensitivity to detonation or knock sensing” issues that is above my pay grade. I am wanting an engine that is powerful for spirited street driving, but do not want to be constantly tuning the engine. Any advice is appreciated, thank you in advance!