this debate has been going on for decades on practically every performance automotive forum in existence.. dynojet vs mustang dyno results.. the most useful way is to get a stock baseline number for your car and go from there so when you do mods and upgrades you can know the gains.. otherwise go with the highest number.. lol..I did light digging on the dynojet, and apparently it reads higher? I don’t know what to believe though. They say it’s a 12-15% higher reading than a mustang dyno, (which I calculated 12%) the power figures are close to stock rated HP and Torque. But obviously the stock numbers aren’t to the wheels. With the calculation, we are actually pushing stock numbers to the wheels now is what I’m getting?
so that’s still a good amount of gains for bolt ons and removals. Which is still about 30hp increase for ratings to the wheels
what I found to be more accurate is 1/4 mile trap speed. It will show power at the ET which translates to HP.. even with slippage, the 1320 still shows power via mph trap speed.. test and tune nights are fun too..