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I think different motors respond differently to wai. Modern engines all have different programing on the ecu. Performance oriented programing probably respond well to cai, were factory programing probably retard the timing in response to cai. I took the computer out of the equation on my 99 24v dodge. When the vp44 injection pump died I replaced it with the previous generation p7100 pump. The sensors are all still in place, but the timing and duration are fixed. I put an adjustable timing gear on so I can easily play with different settings. That makes my truck a good test bed for experiment with cai. I think performance and fe should increase as iat decreases to a point. I'm going to build a water to air cooler that should perform better than the air to air.
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