[TUN3D]

+1 > froop

The JB4 can only take you so far. As you push more power and/or start using meth/e85...the fuel demands change. These changes can not be dialed in properly thru the JB4. While there are added benefits to the back-end flash, the most important aspect is fueling. Once your car is flashed, the JB4 (or Procede in froop's case), is used primarily to change maps/control boost. Everything else is dialed right into the DME.

Even though the JB4 can handle things fairly well, including meth & some E85, you can use a back-end flash at any time. If you're using one of the FREE solutions out there, just make sure you get the right one according to what you're running and what version of the DME you have.

If you're a casual enthusiast -- just run the JB4 with a little E85 (maybe a little meth) and you're golden. Forget the flash.

If you're a power hungry enthusiast...the rule of thumb is to work your way up gradually and log-log-log. The numbers will tell you what to do.