i have hyperflow fmic with nesei icp on the way. any1 no about this fmic.

 

pros cons just anything about it and how it is wouldbe great.

 

I believe once your core reaches a certain thickness it can have negative effects on flow through the core. what you want is a core with the most length you can get, not necesarily a 5 inch thick core.

 

Not really, a longer core will actually reduce flow. You want an core that is long enough to get the intake temps close to ambient temps and that is it. Once you pass a certain length you reach a point of diminishing returns, the closer the charge is to ambient temps the less heat transfer will occur. This is a totally made up example, so don't take them as being anything remotely realistic: Let's say your ambient temp is 80 degrees and your charge air temp out of the turbo is 250 degrees.
6" into the IC the temp is 170
12" into the IC the temp is 130
18" into the IC the temp is 110
24" into the IC the temp is 90
Now you can keep on going as long as you want, but it will take forever to approach the 80 degree ambient temp and only increase pressure drop.

You are right in that a thick core will reduce flow to the radiator, construction style (tube and fin flows to the radiator better than bar and plate) and fin density also play an important role in this. Fin density is kind of a catch 22 though, the people that want the IC to reject heat quickly are roadracers, however this negatively affects airflow into the radiator. Drag racers and street cars can be fine with loose fins since their ICs act as more of a heat sink rather than a heat exchanger.

If you need more flow capacity the best thing to do is to go to a taller core.

 

actually you will hit ambient... it's just whether or not it's worth it to have so much restriction. however if you have a very good design like a core that uses square fins... then you can get away wtih more length and less restriction. the square fin doesn't depend on stopping the air to cool it... it depends instead on the maximized surface area to conduct heat away.

in which case you actually depend on the length the dwell time so to speak of the air staying inside the core but you don't necessarily lose flow.

i'll qualify that by saying if you have an infinitely long core you will never compress the whole thing so yes... length plays a factor in boost up and flow and all that but for the nisei since they use very thin transfer "bars" then you maintain a small volume when it's packed with fins... this means you won't be "filling" a bunch of space you'll be squeezing air through these small channels that the square fins basically make up.

in a louvred fin design you're not squeezing air through channels but more like blowing it through a very thick mesh... a mesh that is say 20 inches long... that's a lotta blowing!

 

nisei holes for pipes are smoller that Greddy on 0.7cm

 

I have the Nisei front mount...And I love it, if you have any questions contact Rob at myevostore.com or the source himself Kevin at Nisei....All great guys and give a ton of info....