what we basically find out is 90% of all the shops have dynojets because they are FAR Cheaper than the dyno like Forged has. Dynojets are $30,000-40,000 for 2-4wd. The Forged Load Bearing dyno is $80,000-100,000 but you can do so much more with the Load bearing. Tuning on a dynojet is an educated guess in reality, where with a load based dyno you can calculate brake specific fuel consumption, injector duty cycle, etc PER RPM which you cant do with a dynojet