Engine Horsepower calculators

What are the free engine horsepower calculators out there?  Or do you need to purchase them to be able to really add in cam specs, head specs, etc to get a good estimation?

away wrote:What are the free engine horsepower calculators out there?  Or do you need to purchase them to be able to really add in cam specs, head specs, etc to get a good estimation?

Wallace racing has about any calculator to estimate hp with

Some can be pretty close and others are far away ... input data is critical.

Garbage in - garbage out.

Name some that you guys use.

away wrote:Name some that you guys use.

Good Luck with FREE ... anything free will have only about 10 inputs and probably won't be anywhere close.

away wrote:What are the free engine horsepower calculators out there?  Or do you need to purchase them to be able to really add in cam specs, head specs, etc to get a good estimation?

PM me your email and I'll send you the one I have. As Randy mentioned you need to fill out the inputs to be close. (ie flow numbers, cam, headers, intake, carb, fuel etc.)