Quote: Originally Posted by blackbird_R/T
Quote: Originally Posted by Lagzilla
his car has the "ED" TIP mod and therefore throws no boost codes ... whether it will recognize 18 -19 psi as too much just by the MAP sensor sensing it then we'll have to see
[cleaned up a little 
]
The throttle inlet pressure (TIP) sensor is used by the PCM to judge and adjust boost response via the factory boost control solenoid. If I remember correctly its solenoid also switches it to atmospheric to measure barometric pressure (sea level, high elevation, etc.). The manifold absolute pressure (MAP) sensor is what the PCM uses
to calculate the amount of air going into the engine and determine when you're going into "overboost". But if you clamp or limit the output and not the TIP sensor the PCM should be seeing it as excessive pressure at the throttle and try to alter boost (if the factory boost control is still used) or take other measures to protect the engine. I mostly ran my car with Stage 2 so I never played around with tricking the PCM input from that sensor.
Hehehe..
I get to KINDA correct Blackbird...
Map/Tip sensors are not calculating the AMOUNT (volume) of air going into the engine... They are calculating the PRESSURE of air going into the engine.
Thats your two big differences between the MAP sensor and the MAF sensor (used on other cars). One measures pressure... 1psi, 2psi, 3psi etc.. The other measures flow or volume of air...
TJ
