I have been trying al day to get my boost down. I adjusted the wastegate rod because I thought that might be it. I cant even get the boost controller to get the boost unddr 8-9psi. I am tempted to take off the controller and just go back to hooking up the wastegate to the turbo. I do not under stand why the MBC is not letting me get under 8.5psi. It is making me crazy!!!!!!!! Its fast but I dont think its safe.

Dave
05 Ford F150 SuperCrew FX4

its safe as long as your egts and af are ok.

Original 15 of 2gnt.com

I have the same problem with my greddy profec-b. the low boost settings will go from 5-whatever. but the high setting knob wont go under 10psi. =/

Robert Parkhurst
toykilla@comcast.net

Well the Profec B and systems like that are designed for boost ranging from 10-12 (low) to 20-30 (high). having low and high boost settings 3 or 4 psi apart is kind of pointless. MBC works perfectly well for low boost settings IMO. Get the Dejon Tool dual boost controller for a third of the cost and you get the same/better results.

i have a 3lb spring, and my profecB is set low 5psi, high 8psi and it works fine, minor boost creep w/ high at the top of 3rd gear, but only goes to 9...thru first and second it stays at 8

-bryan
'98 rst