Which fmu ratio is the best

[tvmendoza]

Hello, i want to know which fmu ratio will be the best for a ka-t, i have a friend who has a fmu that came from a 5.0 ford mustang and i do not know if that will be good.(He does not know the ratio too).thanks

[Warped]

if it was for a mustang it was probably 12:1 (most mustange kits are that)as for twhat disk 7:1 or 8:1 for 7-8 psi and you should be ok over that and your really pushing it. might even be causing the injectors to not shut

[tvmendoza]

so the mustang fmu will not work. My car is a 95 240sx, my turbo is a t3/t4: . 50 A/R COMPRESSOR .63 A/R TURBINE.57 TRIMi still do not order the wastegate, so i want to know how much psi will be ok and what fmu should i use.

[Craving4Boost]

if it is a 12:1 it can technically work however you have you buy something to bleed it to let some of that pressure out. using a 12:1 disk to the fullest potentiol will cause you to end up with no fuel at all. it's just to much. i heard you can get a bleedvalve or whatever at a pet store for dirt cheap

[s86d]

run a 4:1 don't go over 5psi. run 6:1 or 8:1 dont go over 7psi. and If it's a 12:1 say goodbye to your walbro you just cooked it.-Dave

[DRIFTEADOR]

good info on fmu's:

http://brownsword.ca/fmus.html

if the website is right, you have a bit more boost psi before the fuel pressure's "safe limit"