Dyno numbers are all relative. One DynoJet chassis dyno might read a few more horsepower than the next. They all won't read exactly the same. You also have to think about the weather conditions when you dynoed your car as opposed to someone else. There are a lot of things to consider when you compare two different cars dyno numbers.

Now that you have a base line, make some modifications and go back to the same dyno and see how much more horsepower you picked up. Jumping from dyno to dyno won't give you accurate information since they all will read a little different than the next.