Resources
Horsepower and ethanol Calculator
This spreadsheet allows you to see what you will make in different configurations based on flywheel engine horsepower
This is based on mathematics but a variety of factors can influence these numbers. These are typically best case scenarios. It is more useful for seeing changes than determining engine horsepower. The fuel calculators are for trying to get octane up or seeing what ethanol content will be after adding ethanol.
Mainline/Dyno Gear ratio Calculator
This is useful for calculating the final drive ratio when using dynos that require it, such as Mainline. This is set up for Domestic, but other models can be added.
Select the transmission model, input your rear gear ratio, and select the gear you are using on the dyno. The calculator will output the calculated final gear ratio necessary for the vehicle.