Hi, ive recently rebuilt my JCW r53 engine and during the build I replaced the cam with a Newman ph 3/4, and a set of 500cc injectors. I’m now a bit worried I should of gone for the less aggressive ph2 and 380cc injectors and a 210 map. I plan to track the car and it’s not a daily. I assume I will need a remap / tune to make all this ph 3/4 to work? My question is, is it worth the extra expense to get this setup? I’ve heard of horror stories that particular cam pushing the valves onto the top of the pistons!! I could replace the cam with the ph2. Any thoughts and advice welcome.