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MAP adjustment with new vehicles
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HerronPerformance Offline
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Post: #1
MAP adjustment with new vehicles
OK, I have seen a few guys posting up about having some newer vehicles that offer Displacement on Demand or that drop cylinders under certain conditions.
And those same people are talking about adding the MAP Adjuster to help with economy.
Here is where one needs to be really careful! The technology used to cut the cylinders is based on TPS/MAP/RPM, and when the MAP adjustments are being made I wonder how this will affect long term engine life.
If you have this technology and using this MAP adjustment, please report!

http://www.herronperformance.com
05-30-2008 04:30 AM
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qsiguy Offline
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Post: #2
RE: MAP adjustment with new vehicles
I agree, if those parameters don't compute properly you may even find that the variable displacement system won't engage or may engage under too high of a load which could be a bad thing. If it doesn't engage at all after modification of the MAP sensor you will have a hard time seeing any MPG gains and will most likely loose considerable mileage.

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05-30-2008 07:58 AM
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