Originally Posted by bmw335idizzle
Is the Vishnu flex fuel kit better and safer than using jb4 map 5 when mixing?
I have the flexfuel kit.
I think jb4 can be just as safe but it requires that you datalog every time you fill up with gas to make sure you car is running well. And also modify maps if you want to squeeze more power based on the ethanol content.
Because I don't have to do the above and I still get the safe power levels based on ethanol content I think the flexfuel kit is better.