Quote:
Originally Posted by RacnJsn95
Most flow testing is done at 10 or 28" or water. 28" tends to be a standard, which is what I've reported here. I'm thinking that K&N number isn't at 28", but closer to 10" or less.
Keep in mind that this test was not performed through a head, intake, and throttle body such as the Vararam flow test, this is just through the tube and box, so the numbers will read much higher. According to Vararam a 1 CFM gain through the head, intake, and TB is worth 0.2 HP per cylinder x 8 cyl = 1.6 hp per CFM gain.
HOWEVER, none of this math applies to this test as it was not done through a head, intake, and throttle body, as I don't currently have them to run these kinds of tests through.
You can view the Vararam VS the Competition page, as they tested a few intake setups through a head, intake, an TB. The math is shown at the bottom of the page.
Is it accurate? I don't know. |
I've seen 1.5 hp per cfm also, there are several different ways to measure it, but as may be obvious by now, I err to the conservative side when it comes to things like this. promise 1.6 and deliver 1.3 is not as cool as if you'd promised 1..... and since we are talking about less than 10 hp, I think it's less important than say, a supercharger where 1 vs 1.6 can be a huge difference...