with 5#'s you should be ok...I was worried about that too. I have a 12:1 FMU also, and boost around 6-7.5. I was actually a retard and ran it without a BTM for one day with no problems, because I was waiting for my MSD, but couldn't resist 1 run :-D
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Dustin
89 GT(Saleen Clone) 392 rwhp UNTUNED(TFS Intake, spacer,Heads and #2 cam, BD-11A 9#(only boosting 6???WTF),1.6 rr's,BBK 70mm TB,FMS 70mm MAF,MSD 6BTM,FMS 9mm wires,BBK longtubes and H-Pipe,American Thunder cat back,3.55 lots more...
12.564@118.49 on street tires is my best so far. Still untuned
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