downside of using fmu??????????
1. You can't put in 550cc injectors with or without an FMU without another tuning device to scale injector differences
2. A 12:1 FMU raises fuel pressure 12 psi PER psi of source (manifold) pressure..
3. I wouldn't use an FMU for anymore than 5 psi, and temporarily..
4. Old 150,000 mile injectors, high boost, and an FMU is just asking for a stuck injector, hopefully open lol..
5. It's practically impossible to fine tune with an FMU, unless you get an SFMU, which would cost you more than an Uberdata/CROME/etc setup, and makes no sense whatsoever at all..
6. Don't use an FMU.
2. A 12:1 FMU raises fuel pressure 12 psi PER psi of source (manifold) pressure..
3. I wouldn't use an FMU for anymore than 5 psi, and temporarily..
4. Old 150,000 mile injectors, high boost, and an FMU is just asking for a stuck injector, hopefully open lol..
5. It's practically impossible to fine tune with an FMU, unless you get an SFMU, which would cost you more than an Uberdata/CROME/etc setup, and makes no sense whatsoever at all..
6. Don't use an FMU.








