Gernby

Assuming the MAP output is 0-5V (right?), is the output going to be 0V at 1 atm. (WOT, no vaccuum), or 5V at 1 atm.?

modifry

Actually it's 200mv (.200 volts) per PSI. Full vacuum is 0v, which you will never quite reach, and 1 Atm is approx 3v.

The sensor will supposedly read up to 1.5 atm and I know it will go to at least 5.5 psi of boost because I put a voltmeter on it to measure boost on my Comptech SC.

cbender

I can verify that the stock map sensor will read higher than 5.5psi of boost. I run the stock sensor with 7-8 psi of boost with the AEM EMS and it works fine. When I overboosted at Portland International Raceways in September, my EMS logs showed that the sensor read up to 10.5psi of boost -- when the boost gauge went off the map. Given that, I suspect it tops out about 1.75 bar.

CB

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C. Bender
2001 Silver/Black
Turbonetics TO4B 60:1 Ball Bearing Turbo; Tial 46mm Wastegate and 50mm Blowoff Valve; GReddy EGT and Boost Warning Gauges; Speedcraft Front Mounted Intercooler, Mandrel Bent Tubing, 3 Inch Down Pipe, and 3" Stainless Exhaust; A'PEXi N1 Mufflers; AEM EMS, Fuel Pressure Regulator, and Wideband O2 Sensor; RC Engineering 550 Injectors; Holly 250 Forced Induction Fuel Pump; Oil Filter Relocation Kit with Stainless Steel Lines; Clutchmaster Stage 3 Clutch; Toda Lightweight Flywheel; Mugen Radiator Cap, Thermostat, and Fan Switch; Upgraded Oil Bolts; Hecash Brake Ducting; Competch Stainless Steel Brake Lines; WorkMeister S2R 18" Wheels; Spoon X-Brace; Muz Shift Knob; Lucid's Front and Rear Speakers; 2002 Stereo Head Unit; Rick's Front Badge; JDM Clear Side Markers; Uber Cool Nurburgring Decal

Gernby

So 0-4V would be all that the ECU would ever expect to see from the MAP on an NA setup?

AusS2000

0-2.9V is all the ECU would expect. Any higher and it pulls ignition timing drastically.