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View Full Version : TIP Sensor Talk

11-02-2019, 07:32 PM
Well, the TIP sensor measures the pressure upstream of the throttle body (http://www.srtforums.com/forums/showthread.php?t=149598#) (turbo outlet pressure minus CAC and plumbing pressure drop). The NGC compares the TIP and MAP signals (pressure on each side of the throttle body) and compares that to the throttle position. Then it looks up a value for the desired torque (http://www.srtforums.com/forums/showthread.php?t=149598#) for the given parameters and adjusts the boost accordingly.

Another way to think about it: the TIP sensor ensures that there is boost at the ready for the next time you whack the throttle. The NGC tries to keep a little extra boost on the ready upstream on the TB... When guys have a WGA bleed, spring mod, or bigger turbo without recalibrating the NGC, they run into OBD faults like "TIP/MAP sensor rationality" b/c there is TOO MUCH part throttle boost at the TIP sensor and the NGC is smart enough to notice that.

It's also another way to predict throttle blade angle (as long as you haven't modded the WGA) as a check and balance. Modern engine (http://www.srtforums.com/forums/showthread.php?t=149598#) calibrations have many checks and balances to ensure that sensors and the engine are operating as designed.

The TIP solenoid cycles between TIP and Baro (barometric or atmospheric) signals during various conditions... For example, the TIP sensor reads BARO during long closed throttle decels and at key-on.

For the guys with the 'TIP mod' are they running a staged upgrade NGC ? Most likely so... and many OBD functions are not turned on in the Staged kits. On the staged kits, the TIP still operates the same way.... It's just the OBD software is disabled so it doesn't throw a code.

Ultimately, the MAP sensor tells the NGC what boost is at WOT and the NGC adjusts boost to attain the desired torque for the given parameters.