If I'm running stock injectors and mas with a 255 FP and the 2.87" pulley can I change my FMU from 8:1 to say 10:1or 12:1 to make up for the increase air volume and run that safely?? or is it ness. to upgrade the MAS and the injectors.
And if I can just change the FMU which one 10:1 or 12:1

 

With a 2.87" pulley you should probably get at least Emanage and bigger injectors to control timing and fuel better. Anything over 10psi without ignition control is asking for trouble. Also even the Walbro can't have that high pressure.

I would just go with a 3.125" for now if you just want an FMU setup.

 

so if I just put in the purple top injectors with the same set up would it work or do I need the Z MAS too. And if I have the Z MAS and the injectors do I need the FMU? What do I need???? I'm new to this? where can I get the 3.125" pulley?