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Message: [QUOTE="Dwburroug, post: 1155306, member: 18938"] I was wondering how long it would be till I started seeing these threads. I tried speaking with Mike from No Limit about how it is impossible to change the Maf housing size without adjusting tuning to compensate for it ...plain and simple...its physics. He did not agree with me and was avoided all discussion of the topic despite me spelling it out. I don't disagree he has made a fantastic flowing intake....but it should only be marketed as a custom tuning required product. Not a bolt on intake like a s&b or afe etc. Your Mass Air Flow Sensor has one job which is to attempt to tell your ECM the ammount (mass in grams/sec) of air going into the engine. Mass is a function of density, which is known for air at all temperatures, and volume. So really your MAF needs to know temperature and volume. Temperature is easy and is measured in various places in in intake stream. Volume is all we need then. So to find the volume of something flowing through a tube or opening you only need to know two things... The speed/velocity it is passing through the opening and the area of the opening. This is where this intake design fails. You have significantly changed the area of your Maf housing without compensating for that in your Maf g/sec tables. This in turn requires various other parameters in your ecm to go to the far ends of their correction ranges to compensate for the invalid Maf data. Then guess what happens when you get the smallest variation and you are already at the limit of your correction ranges? You can't correct anymore, you throw codes, you run the engine far from optimal. It's not the right way to do things. Can your ecm compensate 90% of the time? Probably. That other 10% your going to be throwing codes because the ecm is fighting itself and can't correct any farther. -An engineer who understands ecu's [/QUOTE]