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, Thu, 22 Jun 2006 17:49:13
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Yes, I did use a manual boost controller on the wastgate line to increase boost. But I also bled the line to the map sensor. The Chrysler ECU is set to cut fuel at 14lb boost. It uses data from the map sensor for overboost protection. The Mopar Performance computer I was using in the car had max boost set at 10lb boost. When I overrode the computer with the wastgate bleed, the computer was cutting the fuel at it's programmed 14lb boost from the map sensor reading. Without overriding the map input there was no way to get around the ECU default cutout setting. By bleeding the line to the map sensor I was able to increase cutout to 21lb. I set this by adjusting the wastgate bleed to around 24lbs boost. Then I dialed in the map line bleed until the ecu was cutting out at 21lbs. I then dialed back my wastgate bleed to 20lbs boost, just below overboost cutout.
Here's a how-to link: http://home.earthlink.net/~turbogus2/cutout.html
If I understand correctly, the pressure transducer in the APC system is similar to the Chrysler map sensor. It reads manifold pressure, converts the pressure to an electric pulse that the APC box can read, and the APC uses that data and other input to decide to cut fuel at a preset point to protect the engine from an overboost condition. Would I be correct in this assumption?
posted by 68.232.25...
, Thu, 22 Jun 2006 17:49:13, Thu, 22 Jun 2006 21:45:55, Fri, 23 Jun 2006 10:32:34
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