yeah he seems to be right why would you want an empty tuner without a dyno to tune it on you just going to guess at the air fuel and spark at different rpms that probably would lead to a lot of detonation this aint like the old days of turning your distributor till it pings then back it off a bit there are a lot of sensors that have to be happy sct spends probably weeks or months on a dyno tuning for cars with engin safty and power in mind if you want diffrent you have to tune on a dyno to set it to your car its like a penutbutter and jelly sandwich everybody wants one so id make them with creamy if you want crunchy you need to go to the store and find the right crunchy for you