what is the ratio on the jrsc fmu's that come with the 99-00 si civic supercharging kit? need the answer asap thanks

 

5:1

 

aer you serious

 

yeah.. i have one on my car right now.

 

man i thought they were like 12:1
doesnt 5:1 seem a little low?

 

does seem low. Have you checked the Jr site? i have a Vortec 12:1 if you need it 50 bucks

 

i tried looking on jr site, but couldnt find anything about a fmu

 

then check the FI section....
and still got my 12:1 Vortech one for sale!

 

NO... the JR FMU is just fine. i'm using it on a GSR motor with stock boost (6psi).

if it was too low, JR wouldn't include it with their kit. if you get a higher one, like 12:1, you'll just run that much richer while in boost.

 

well im not going to use it with their supercharger.....so they dont even make a 12:1? and the search function is down so i cant search very well

 

you have a pm

 

you can still use it with turbo. all depends on how much boost, injectors, fuel pump you will be using.

i used to use a 10:1 with my ls turbo on 10lbs of boost and rc 310cc injectors.