ok, i bought the recalibration kit for my Vortech FMU, the one with all the different ratios in it. I'm gonna be running 370's with a VAFC, so which ratio do i need to use, and how do i recalibrate it? Do i open up the blue housing, and replace it with these discs in the kit? Which disc do i need?

TIA

 

Open up the screws (hex). I think 6 of 'em. Then take out the disc (silver) and also the kit will provide you with a new Blue rubber thingy. Not sure what its called. Hah. replace it and bam. Thats about it. The bigger the disc, the higher the ratio.

You should get 8:1 or 6:1 with 370ccs

 

6:1
will do you

 

I'm pretty sure that the FMU disc ratio sizing is relevent not only to injector sizing, but boost pressure. Need to know what kinds of boost pressure you're running before determining which FMU disc is right for you.

 

Not really since the rise rate is linear. 8 pounds of fuel per pound of boost, etc. The more boost you run, the more fuel will be added.