I don't know if you noticed but in case that you haven't noticed the Evo 9 bumper is very restrictive were the center main bumper opening cools down the intercooler.

I haven't realized until I saw the FMIC poll topic where Nisei had posted some customers pics with their intercoolers.

Anyway, have you guys seen the Evo 9 front bumper?, the window in the center where you cool down the intercooler is about 8" narrower than the Evo 8 Bumper so you guys know where I am coming from right?, no matter how big of intercooler you get it is going to be significantly covered by the two main bumper pillars on each side of the intercooler.

I thought that this is a significant discovery because now that all the vendors brag about their products we should be aware that the colling surface area is dramatically jeopardize by the physical position of these side pillars.

Here is a link of a pic of my cars, the pics are poor quality but please pay attention to detail to the side of each intercooler, the Evo 8MR(Silver) has a much bigger cooling area than the Evo 9


Please feel free to comment, but I think I have a point , fortunately it does not affect the Evo8 Bumper as much as it does the Evo 9 bumper.

my .2c


Carlos

 

Your right, but this is nothing new.

 

I know that is not new but have you seen the advertizing from some vendors?
they refer to the cooling surface area but the reality is that the actual cooling surface area is completly blocked.

When you see some vendors advertizing you can see that they use their cooling surface area to show you how capable the intercooler will be and how promising the performance can get however if you have a Evo 9 and try to fit a huge Perrin or Nisei(both 25" long) you are out of luck, any other intercooler that is 8 " narrower is going to be almost as effective due to the fact that the extra few inches on the wider intercooler are blocked , therefore compromising their cooling ability.

my .2c

 

This person (burningmoney97) actually thinks exactly like me , I don't blame him. The Evo 9 bumper might look cool as hell with the holes to cool down the brake ducts or whatever but definately is going to hurt the performance expectations if you swapp the FMIC for a big one.


Off course granted that the Mitsubishi engineers never make their cars thinking that you will upgrade the intercooler to a bigger one, they actually try their best from a factory prospective point of view.

Read the post/answer number 10(last one):

https://www.evolutionm.net/forums/sh...hreadid=177449

 

So get a C-West bumper or somthing where that window is HUGE.

 

I was following that thread as well, but decided to comment on your 'findings' in this one. Your preaching to the choir man. Its up to the consumer to know that if they have a evo IX front bumper the larger IC might be obstructed by the smaller mouth. Basically they need to practice common sense.

 

Rraultson has a Cwest front bumper on his black Evo, definately he has indeed the best cooling advantage but then you compromise the factory looks(sleeper).


If you are a Evo 9 , there is no doubth that it is something to consider.

 

aftermarket installed on evo 9
https://www.evolutionm.net/forums/sh...d.php?t=174439

 

Its still going to be thicker than stock, so even with some obstructed airflow it will still be better than stock. Everything in Automotive engineering is about compromise, this is just another example. Sacrifice stock look for a few extra degrees of cooling, its a choice based entirely on asthetics. Looking at some of the pictures it looks like the only thing covered up (at least with the Nisei kit) is the endtanks anyway.

 

You of course have extensive research and performance tests backing up this claim correct? I'll wait for someone with the knowledge like Buschur to chime in, but I don't see the Evo IX bumper holding anyone back in making big power.

 

IX bumper w/ the holes is actually supposed to be an improvement over the VIII in the ability to direct turbulent air towards the FMIC from two offset angles in addition to the direct air. Just something to think about.

 

i'm sure mitsu did it's homework on style for purpose. still evolving.

 

Here is my post from burningmoney97's thread in the Evo General Section:

 

You might be right on the money!

According to Corky Bell's book on Designing Turbo Charged Systems, "Maximum Boost" on page 58, it shows a similar design to the IX's (roughly speaking) as being "better" that the VIII's "poor". (his ratings are: poor - better - best)

The best design according to him would be a slightly smaller opening than the IC cooling plate area, that would actaully be slightly tilted inwards to gather the air and force it though the fins. Sorry I don't have a way to diagram it all, but put simply:

*Poor: The air can run around the outside edges on a wide open inlet

Poor Example: ________ the solid line represents the fin area, nothing to stop the air from flowing around the IC's edges

*The "Better" Example: Below,the air gets directed to and through the fins with the "scoop" that has walls that angled outwards (wider in front to narrower at the IC.)

\______/ solid line is the fin area - air flow is from top to bottom

*The "Best" Example: Below, the slightly smaller than fin area opeing that gets wider as it goes towards the IC is "BEST" in his theory because it "forces" the most air through the fins.

/______\ same deal, only opening is smaller - air flow is from top to bottom


Kind of conter-intuitive till you think on it.

I have an VIII but I figure I can always shroud it If I ever get concerned. The IX's opening still only affects a 6x22 inch area, it doesn't actually shroud the opening effectively because the are several areas that would allow air to go around the edges.

I wouldn't worry either way,

Somebody ought to design a CF shroud that could fit behind the grill on the VIII. I'd buy that if it were priced reasonably.

My Nisei is on the way (Homer's drooling sound in the background) (:-(|)

N - i - s - e - i ahhhggghhhhhhhhhhhh ohhh baby