how can you tell the different from the
12.1
10.1
8.1
fmu's by looking on the inside i think this guy sold me a 10.1 not a 12.1

 

Is it a Vortec? I asked the same question in the engine managment section of the fourm awile back.
Google the part number stamped on the bottom of it.

 

its a knockoff

 

i think 12.1 means , FMU raise 12 PSI of fuel per 1 PSI of boost..

 

How many times do you guys need to be told that FMU's are ---- unless your car is carburated go with chipping/good tuning software. in the end you save money.

 

Find me some one to chip my 93 Escort and I'll gladly ditch my FMU.

 

FMU's work fine on a cheap setup. Will help some on a low boost setup.

Not everyone has a tuner/chip burner/knowledge etc to have their ECU's chipped.......

It depends on the cars too, like his escort in this case.......


Sorry that I can't help on the real issue here, but what makes you think it's a 10:1.......if it is a knockoff it will be hard to know.