FOR SALE!

100 bhp per Litre







Updated:
24 April 2007

The 3-Bar MAP sensor can measure boost levels up to 28 PSI and replaces the standard Mopar Turbo I/II 2-bar MAP (14-15 PSI) sensor. The stock Normally Asphyxiated TBI uses a 1-bar MAP for its required range of 30 - 0 inches Hg vacuum.

GM's AC-Delco division has a 3-Bar MAP sensor that was used on the 1989 Turbo Trans AM 3.8L V6. It is P/N  1#213-101 (1#1604-0749). This sensor must be used in conjunction with an intercooler, larger injectors, and a custom calibration, FWD Performance Stage 4 SBEC. The custom SBEC calibration achieves higher than 2-bar ECM (wastegate) controller boost levels without resorting to 4.7 vDC zener diodes or adjustable bleed valves to "trick" the EMC. Click on the graph to zoom.

 

When looking at the GM 3-Bar MAP sensor with the vacuum port facing you (front, as shown below), the three connectors are from left to right, "A, B, and C." The solid red lines indicate the "key-way" positions on the GM sensor. Note: the connector latch at the bottom of the sensor,

Usually,  GM 3-BAR sensors have these connections stamped on the rear side of the sensor.

Physically, you will need to cut a small notch in the vehicle's gray (male) harness connector to match the "A" key-way on the GM map sensor. (The stock gray Weather-pak connector already has key notches in the "B" and "C" terminal positions). The notch can be carefully cut with a sharp knife blade on the (A) terminal with the BLACK wire with LIGHT BLUE tracer, as shown:

Double check the wiring to insure the harness connector wiring matches the sensor/ECM as follows: