Nitros question

when you retard the timing your trying to get the spark to ignite the mixture at something like 12 atc, which is the point that it has the great psi. adding compression to your motor should just produce more torque for a given set of jets. check the ground strap on the plug after each pass to make sure the timing mark is at the 90 degree turn on the strap. you'll see a grey or blue tint to the strap then it will be black or really dark gray, that is where you want the mark. if it's still on the strap towards the end at the electrode there isn't enough and if it's passed the 90 towards the tread part of the plug you have too much timing.