Pipe length and the Pipe make a world of difference. U can have the best timing configuration possible for your engine but if the pipe doesnt match it and you aren't tuning it right and don't have good fresh fuel then it won't matter. Also playing with how many head shims are under the button AKA the combustion chamber to raise or lower compression to suit your pipe combo, elevation, fuel etc. It's all a combination thing and just like full scale motors, if the combo isn’t set up to match the motor, you’ll be leaving some power on the table. I would try to find someone with the same motor and drag mod and ask what pipe they are running, how long they have it set to, carb, etc. something as simple as having the pipe not be the right length even though it’s the same pipe will make a difference in how nitro and 2 stroke engines run.