After reading about making cars go their complete fastest, I think I have found a way to save quite a few of credits in the process. If you read Officer_Kartman's guide, he wants you to Dyno after each part you put on. He may have some alternate reason for this other than getting the Power Rating accurate, but here's a way to skip that tuning and save it for the end while still finding out which part is the best. Officer_Kartman, correct me if there is another reason for tuning after each part.

Set up a proportion to find out what the power rating would be at 100%:

Power rating..........Percentage given

___________ = _______________

.......X..........................100

Obviously you are solving for X, which is the max PR you will get for the part you just put on.

EXAMPLE:

Power Rating: 404 (96.85%)

404........96.5

___ = ____

..X.........100

To solve: Cross multiply (100 X 404)

Then divide this by 96.5

404 X 100 = 40,400

40,400 / 96.5 = 418.65284

So the power rating you would receive with this part added on would be about 419. If you do the same with all the other parts, you will know which puts out more power without tuning.

Set up a proportion to find out what the power rating would be at 100%:

Power rating..........Percentage given

___________ = _______________

.......X..........................100

Obviously you are solving for X, which is the max PR you will get for the part you just put on.

EXAMPLE:

Power Rating: 404 (96.85%)

404........96.5

___ = ____

..X.........100

To solve: Cross multiply (100 X 404)

Then divide this by 96.5

404 X 100 = 40,400

40,400 / 96.5 = 418.65284

So the power rating you would receive with this part added on would be about 419. If you do the same with all the other parts, you will know which puts out more power without tuning.