Ok I've got a Vortech 12:1 FMU and a Walbro 255 High Pressure intank fuel pump, question is, will the FMU be able to handle the pressure output from the fuel pump? Or will I have to get another FMU Disk?

 

ttt

 

C'mon weenieheads someone has to know...

 

i ran a holley 255 with a 12:1 for a couple months. it worked ok, a little rich but no real problems. you should be ok for a while.

 

A while as in.... 3 months... 6 months... 9 months.. 3 years!? I'd just assume sell it while its brand new and buy the one that will work fine.

 

i ran it for about 4 months. the fmu kits are pretty cheap, and cake to install.

 

Did you change it out b/c it was hampering your performance, or you heard that it was bad or... what made you swap them out?

 

i bought RC 310s. fuel pressue would have been too high with those, otherwise id still have the 12:1 in there

 

Ahh, I gotcha, so on stock injectors it'll work, but if I threw on the 310's like I am planning to do, then I'll have to take it out, thanks.

 

310s probably 8:1.

WIth what you've got 12:1 will probably be too high. Also, the walbro will be maxing out, which isnt good for the pump...a 10:1 would work better. SHort of that you can put a bleeder valve on the vacuum line (top of FMU) and with vacuum bleed get it down to approx 10.5:1 with your 12:1 disk.

 

have fun installing that in tank, sucks ***