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Doc Olds -> RE: Someone else's homemade intake (4/22/2008 7:35:59 AM)
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What can an intake do for you, that is the question. [:D] If you think a steel or aluminium pipe will get hot while driving, you are mistaken. Plastic IMO screams "cheap", but it is less of a heat conductor, true. CHP previously pointed out that there can be heat soaking, like after parking, possibly heavy stop and go traffic, etc. When in stop and go summer traffic, your intake can't do anything to boost performance for you any way. When you fire up the engine after parking, any warm metal pipe cools quickly (within a couple miles). Is it possible that there could be some heat transfer the few moments after you start it and idle over to the tree at the start line of a drag track after parking hot, and rip it? Yep. My H3 has been to the track, but not ripping down it. All of these materials are used by many intake makers, some use more than one for the same application. The real world issue is air flow, heat transfer is deminimus, so much so I can't measure it. I'm not a laboratory, but the cylinder head porting business nextdoor does have a sweet flow bench, and helped me with testing. Since we do not drive in a laboratory, I think I'll worry about air flow. Others are free to have their own opinions. Steve#1, you'd have to have a lot of heat transfer to offset 30% flow, that is why I feel it is important to grab your intake charge from outside the underhood engine compartment, rather than use the heat shield/barricade off in the corner. That set up is not gonna shield heat 100%, and will have you sucking mud when off roading in wet/muddy conditions, but it is trying to increase flow to offset those shortfalls. Nothing is perfect, but some of it is pretty darn good.
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