Multiple Hall Effect Sensors

Thanks John
I purchased a Mega 2650 Starter Kit as i had seen some really good reviews on the forums about them and thought if i am chucking a bucket load of money at the car to restore it the cost of the arduino was small fish .... The original plan was to collect the data with the arduino and pass it to the Raspberry Pi to display on a screen ...A bit like AutoPi ... But without OBD or any kind of CAN bus i am sort of flying by the seat of my pants

Thanks