Originally Posted by alsgto04
So are you trying to say that they are no good (cai) that all the dyno proven test that they do on them are bull sh*t. Kind of confused here?
well first of all you have to look at the "proven dyno tests". they are compared to stock filter/boxes not modded boxes with high flow filters. the second thing is the tests are conducted with the hood open and a large fan blowing cool air into the engine bay. hardly what you do on the road/track. the intake can also affect the tune as it can lean out the air fuel ratio. tunes optimizing each intake tested should have been done. the tests have some merit but you have to take in all of the variables to really draw any conclusion and then it's only part of the picture.
if you look at my last post in my intake thread up in the sticky you can see how intakes should be tested. it's not as sexy as posting a dyno HP number but it's more to the point. an intake only does 3 things and they can be measured.
1. to keep the incoming air clean.
2. to do it as close to ambient temperature as possible under all conditions.
3. to deliver that cool air with as little restriction as possible.
1. the filtering is how many microns or whatever it filters to.
2.the temp is easily measured with the IAT sensor and it really needs to be done under actual conditions, i.e. stopped, heat soaked and driven until the IAT temp comes down to it's lowest point. the longer it takes and the higher above ambient it is the worse it's doing and the least optimum power.
3. MAP is a measurement of inner intake manifold pressure in kpa. whatever the barometric pressure is that day is the highest pressure that normally is in the manifold. for reference 30 Hg mercury is 100 kpa. a restriction due to the engine sucking in air and intake system restricting it, results in a kpa below whatever the ambient/static pressure is. you want it as close as you can to that static kpa at WOT but the tubing's diameter, smoothness, length and bends restrict as well as the filter, MAF, TB and intake manifold.
from that you can see that you can easily evaluate an intake and do it more accurately than you can with a dyno.