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6.7 Aftermarket
Scientific Intake Selection and Review
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[QUOTE="6.7Bison, post: 1543343, member: 32432"] Outcomes of my baseline runs. For some future comparisons to test my hypothesis and make sure the intake does what I want it to, I took a couple baseline runs with the stock intake on some temperatures. The numbers seemed to be in line with what I have seen before as well. After 5 minutes of initial start up and idle. Truck was plugged in the entire night beforehand inside a three sided shed: Ambient temperature was 9F. Intake air temperature was 27F. Granted it was very cold so the temperature difference is probably exacerbated but that's still a difference of 18F with what is regarded as a true cold air intake. After getting warmed up during the commute at 60-65mph (engine temperature needle was directly in the middle): Ambient temperature was 3F. Intake air temperature was 3F. CAC temperature (directly after the intercooler) was 62F on the flats and 68F climbing the hills. EGT from the factory stock location 420F on the flats and 530F climbing the hills. After 5 minutes of initial start up and idle. Truck was parked in an open parking lot: Ambient temperature was 46F. Intake air temperature was 41F. My best guess here is the direct sunlight heated the ambient sensor to higher than the actual air temperature as is seen below. After getting warmed up during the commute at 60-65mph (engine temperature needle was directly in the middle): Ambient temperature was 41F. Intake air temperature was 41F. CAC temperature (directly after the intercooler) was 77F on the flats and 82F climbing the hills. EGT from the factory stock location 460F on the flats and 600F climbing the hills. Again there is good evidence that supports the stock system being a true cold air system. I will do another couple runs after the installation of my system to compare both at an idle and on my commute though it is starting to warm up here. If temperatures creep up too much I will look into blocking the warm air from the engine bay from entering the intake. I would have recorded MAF numbers but there are enough ambient variables in play let alone the ones the engine adds I don’t have a high level of confidence in runs that aren't back to back. The best I can think of is a run before and after the installation in park at a couple different rpms directly after a cold start. This way I can check the flow increase claims made by S&B in real world situations. Depending on the numbers, what I find during installation, and what I find out with temperatures I might try opening up some air paths. I don’t have access to a dyno for before and after for more official power and torque curves. Best I can do is the butt dyno and driving impressions. I will also keep track of fuel mileage with the new system. It may take a while to collect the data as this is not the primary vehicle so please be patient with me. [/QUOTE]
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