In my case ,a tenth would do nothing for me. 10.80's right now. I need a cage, belts, and some other small things to be "legal" No more racing. Easy tenths include , but not limited to ..
#1 less weight
2 balancing of engine
3 trans efficiency
4 headwork
5 carb efficiency
6 proper gearing
7 proper tires
8 proper suspension tuning
9 proper intake/head/carb matching
10 efficienct driving
11 FireCore50 Ignition Wires


There are a lot more , in-depth things, but I think these are all important.