Tuning with open downpipe
So I have a predator to tune with, and I've done some searching and here's what I've come up with....
I heard that after you've installed an open downpipe, you don't really gain power because the computer is used to not having that good of flow. So once I've installed a 3" downpipe with a cutout, I should open the downpipe and disconnect the battery, reconnect it, start the car, and drive it normal for a few minutes and then do some WOT pulls so the computer can relearn with the much better flow. So here's my next question... After I've let the computer relearn with the better flow, and then I close it, will the car run worse than a normal car with closed downpipe? If not, will it relearn again over time for the closed pipe so that when I go to open it, it won't be fast like it should?
Basically what I want to know is... To actually have the car be faster with an open downpipe, I have to have the computer relearn the better flow. So once it's done that, will it stay that way even when the downpipe is closed?
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AEM cai, FM wga, DSP w/custom tune, 3" catless side exit exhaust, Mopar sts w/booger bushings, stage 1 injectors, pcv check valve, Eibach pro springs.
SAE corrected: 290 whp/323 wtq running solid 18 psi, no spike.
Having a nice sports car and driving it slow is like having a hot wife and not f***ing her.
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