Join Date: Nov 1999
Location: Aurora, Colorado
P1SC ran outta boost?? WTF?!?!?!
I'm confused here; hopefully someone can set me straight.
After forging my 4.6 and getting a proper chip in we dyno'd my car today. I used to pull 12-psi, then added BBK LTs and the off-road pipe. The boost went down to 10-psi.
Now after the forged motor, ported heads, and ported Bullitt intake the boost dropped to only 6-psi.
I actually LOST power from my last dynos. BEFORE the LTs and pipe I dyno'd 392 RWHP. With the LTs and pipe I eeked up to 399 RWHP, but then realized that 3 cylinders lost compression.
Now that everything is forged and correct I'm only at 388 RWHP.
My mechanic tells me that the P1SC has "run out of boost" and can't ramp up with the motor.
Is this true? If so, what can be done about it?? I'm not thrilled to shell out another $1200 to ATI for an impeller upgrade.
Any ideas, comments, questions, etc??
I'm lost here....
P.S. I'm NOT using the Univer MAF that's listed in my sig. Apparently JMS can't get it tuned without actually having the car in their shop due to the voltage changes...
Black 1999 35th Anniversary Limited Edition Mustang GT #4478
Forged motor, Ported heads and Bullitt intake, ProCharger D1SC with 3-core intercooler and 12-psi pulley, FMS 42 # injectors, 2003 Cobra tank, etc. etc. etc. Too many mods to list here...
2005 Legend Lime GT 'vert
FRP Axle-back, XM radio, MGW stuff, clear bra, tint, minor interior mods
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