I dont think anyone has asked this, atleast not recently, so here goes.... What is the most boost anyone ahs run with the use of an FMU? Also, if an afc helped to run more then how much was that? Thanks alot - matt

 

I mean safely, not 20 lbs and blowing it up

 

Ok, well lets see... has anyone run 15 lbs?

 

I know somebody that was running 12psi on an 8:1 disk. 12:1 or 10:1 are pretty much out of the question because of the fuel pressure you would be running. just imagine your running 12psi with a 10:1 disk. right there thats 120psi!!!! plus whatever base fuel pressure your running(lets say 40) thats 160fuel rail psi at max boost. theres just no way an injector is going to work with tat much pressure. it's just goingt o stay open and create some seriously lean conditions. if you already have the afc just get 450's and a btm to be on the safe side and boost 11psi. I've done this with 100 octane unleaded race gas and there's no detonation. thank god the hack runs rich

 

That is what I thought was possible. I thought I remember someone saying they were using a 4:1 disk with the 450's, do you think this is a good idea?

 

Ya, if you are making 300whp or more. The 450's will give you enough fuel for at least 250whp.

 

I'm running 370s with a 6:1 and a VAFC hitting 13psi, so far so good. I should be on the dyno in the next two weeks.

 

I have a question, if you have your setup like this and you hit the dyno and see you have a too rich condition in the 3000-4000 range but good everywhere else, what do you do? What can you change?

Again, I point out the un-tunability of a FMU system.

Randy

 

I have a VAFC.