which FMU??

Joey's mx · Post by **Joey's mx** » January 8th, 2006, 11:32 am

Ok what FMU should I be buying :
8:1
10:1
12:1

What is the difference between them, and why would use the one you specify??

Josh · Post by **Josh** » January 8th, 2006, 7:11 pm

you want the 12:1 because your running turbo. so you want to be on the richer side. when you order one they ask you to specify because they change the spring rate inside the FMU to change the A/F ratio to the one you will be needing for your application, like the 12:1.

babyblueMX3 · Post by **babyblueMX3** » January 9th, 2006, 11:16 am

or why don't you just buy a cartech wich lets you change it like you want with the turn of a knob ? only disadvantage is you don't know what ratio you're running. Just get a wideband 02 and you'll beed good to go