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Map Sensors with two intake manifolds

Norm Sash

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You can only use one MAP sensor with the ECU.  I would supply the MAP sensor from both plenums so that the MAP reading averages out.  For consistent running you should have a balance bar between the plenums to ensure that both banks get even manifold pressure and hence are more likely to run even mixtures...  You will also need a TPS that is representative of the throttle opening on both plenums.

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