I have an 07 mz3 tiptronic (hurr faster than manual, valave bodies ;D). I got exhaust on it, headers, intake, new spark plugs, and just invested in a wideband gauge. I want to tune the spark and fuel without dropping 1500 on a stand alone. I am going to buy either a hypertech piggy back or an AEM fuel/spark tuner. Which should I get? Why? Experience with it?

 

the aem unit requires a wiring harness thats not available for the 3, the hypertech unit is a untuneable plug and play unit, something like a cobb setup. Neither of these are what you are looking for, what you want is going to cost 1500+ no way around it

 

well if i settle for a hypertech... with stock injectors, will it be worth it in your opinion to buy? Will it adjust and increase flow if i get larger injectors later on?
Are gains from it easily noticeable after installation?

 

i myself know that its pointless to do small stuff with this car, little to know gains are achieved with high amounts of money thrown at it, so no at that price a hypertech is not worth it to me esp for an auto. Also you cannot just put in bigger injectors a real tuner is needed, the only thing that will change with bigger injectors is how much fuel is could spray and the stock ones have a little more room to go, which again require a standalone to get it done.

 

thanks