[Ed Wright]

I agree. I have a Dynojet, and think that et prediction/1/4 mile run simulator deal is a joke. I never use it. How fast you can spin up those rollers has very little to do with how quick the car will be. I tune a lot ot cars making 100 more rwhp than my car at about the same weight, yet run over one second slower. Way too many variables. Its good to know, however, where you are at the track versus how much power your making at a given time. After a while you will have a somewhat fair idea how much your car will pick up after seeing gains on the dyno. It's a handy tool to have access to.