Any big name brands but you can't just stick semi slicks on and get full performance out of them you need to set your car up to use them for example Trackdays you can be more aggressive with setup you can run stiffer springs,camber,toe etc but this will compromise road setup can't have both with out £££££&&£££££
Higher octane fuel burns slower less susceptible to det so don't understand your not wise point on higher octane fuel you should always use the best fuel available and you always tune with safety margin I mind for bad fuel etc
spark advance should decrease as VE (airflow) increases and vice versa. VE will peak around peak torque then decrease so more advance is need after peak torque. Knock is usually around peak torque. if your using 95 fuel knock is going to be present.
True. Best thing to do is to try different pressures see which is best. I like a little oversteer to help turn my car and reduce understeer so higher rear pressure works for me
Front tyre pressure wants to be less not more. Heat soak from brakes and it's fwd so front tyre pressures rise quicker than rear common mistake people make
Why would u go frm 4th to 3rd at full throttle that's stupid ;) Is it just those gears? Did you do clutch yourself? I would be looking at selector first if that's ok might be something inside
I wouldn't be worrying about coolant temps 30psi on td04 overspeed, bearing failure, lean as fuck afr will melt exhaust wheel,pistons,valves etc your rate lucky if you haven't done this.