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    1. 01-20-2007 11:30 PM #1
      I think I may be stretching my luck now

      RPM vs. MAP (% Efficiency)

      Anyone?


    2. 01-21-2007 10:55 AM #2
      Get on up

    3. Member haenszel's Avatar
      Join Date
      Mar 14th, 2004
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      '00 A4 Avant VR6T, '04 .:R32
      01-21-2007 11:03 AM #3
      stock motor?

      edit:

      It'll get you running. It runs good, although maybe a bit rich up top on the 10psi I was running.


      Modified by haenszel at 4:09 PM 1-21-2007

      10.201@143.35mph - VR6T

    4. 01-21-2007 11:19 AM #4
      Stock turbo AWP (K03S)

      Thanks a million

      Anyone have VE tables for a T3/T04E 57 trim


    5. Member haenszel's Avatar
      Join Date
      Mar 14th, 2004
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      '00 A4 Avant VR6T, '04 .:R32
      01-21-2007 11:21 AM #5
      This map was SUPPOSED to be for a stock turbo, but I ran it on my t3/t4 60-trim at 10psi w/440's at 3bar. With a little leaning out up top the tune was pretty spot on as far as AFR. Pulled the motor apart and there was no problem with detonation on the piston tops, and I was non-intercooled as well.

      It'll get you started/moving and driving fine. You'll have to f with it for optimal WOT tune, part throttle was pretty dead on for me.

      10.201@143.35mph - VR6T

    6. 01-21-2007 09:07 PM #6
      Amazing...

      Anyone with a VE / Spark map specifically for a BT setup of any sort?


    7. 01-22-2007 11:19 AM #7
      UP

    8. 01-29-2007 11:20 PM #8
      Is the pressure in the above tables absolute? (just confirming)

    9. 01-30-2007 02:04 AM #9
      Yes, it's absolute. 100 kpa is the same as "0" on your boost guage (no vacuum, no pressure). Also, the type of turbo won't have an effect on VE (how much available air, relative to cylinder size, actually makes it into the cylinder).
      2002 Jetta Wagon 1.8T
      1987 Scirocco 1.8T
      1987 Vanagon Westfalia
      1947 Stinson 108-1

    10. 01-30-2007 10:33 AM #10
      That's exactly what I wanted to hear

      Regarding the factory IAP sensor...
      Through VAGCOM - Adjustable Power Supply - Oscilloscope testing, I've determined the following sensor calibration:

      0.3V = 120 mbar (first point)
      2.7V = 1390 mbar (final point) - any higher voltage reports the same charge air pressure

      Is this VAGCOM reported pressure relative to atomosphere? (just confirming)

      What about when the engine is operating under vacuum (relative to atmosphere)? For example, at idle and negligible load.... How does the ECU determine spark advance?


    11. 01-30-2007 11:42 AM #11
      That doesn't sound right regarding the voltage v boost. You should get up to +/- 2500mBar at 5V. Did you measure the voltage actually being applied - reason I ask is that the sensor wire from the ecu also carrys 5v which the MAP sensor sinks down to the voltage it is outputing.

      Vagcom reports atmospheric + boost.

      As for timing etc under vacuum, I think these cars are more MAF based than MAP. I think it uses the MAP sensor more just to control boost to match requested boost. If the MAF is unplugged then I guess it may use the MAP more - but not sure, I think it would actually just run directly from base maps (tables) in the ecu.

      I am not claiming to be an expert, but that is what I have gathered from my experiences. Someone correct me if they know better.


    12. 01-30-2007 12:28 PM #12
      My reported calibration above was read from the VAGCOM when the car was in accessory mode.

      Maybe VAGCOM only displays up to 1390 mbar while in accessory.

      The test was performed as follows:
      The IAP pin was connected to the positive on the supply. The sensor ground pin was connected to negative on the supply. The power supply voltage was increased and reported VAGCOM pressures were recorded.

      Maybe my testing procedure is flawed?


    13. 01-31-2007 11:26 AM #13
      What does vagcom report just with the sensor unplugged?

      Maybe the ecu realizes that the sensor is unplugged which messes with the results. I would try it with the sensor plugged in, splice the ground of the power supply to the sensor ground and disconnect the sensor wire and put your + power supply on there.

      I think the sensor wire is battery ground, so you can pobably use any ground instead of splicing.


      Modified by SAGTI at 8:28 AM 1-31-2007


    14. 01-31-2007 09:14 PM #14
      With the sensor unplugged VAGCOM reports 130mbar.

      The testing procedure you mentioned is nearly exactly what I have completed.

      Anyone else?


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