dynojet conversion factor?

ot sure about thisone but if you realy want to know your flywheel HP and dont feel like takiing your engine out of the car to test it, theclosest yu get is trying to find a dynojet facility with people wyo realy know alot about the car you want to test! i´m going to dyno my car at a company thats specialist in mopar and they have a bigger chans of having a workin correction factor for the power loss in the driveline , just my little advice