Drivetrain M7 DFIC
OVERDRIVE
Joined: May 2003
Posts: 7,926
Likes: 40
From: Greensboro, NC
Originally Posted by Barnabas
Can someone explain to me how the IC achieves outlet temps LOWER than ambient?? I know physics (I have a BS in it) but this is puzzling for an air-to-air IC. I'm not getting it at all
4th Gear
Joined: Feb 2004
Posts: 492
Likes: 2
From: Mission Viejo, CA
Originally Posted by MSFITOY
Rapid expansion of gases cools rapidly...How that's achieved without moving parts (besides fast moving air) is the magic
I'm surprised it works that well considering the pressure difference isn't that great. Or at least I don't think it'd be that great. Either way makes sense, and damn I want one!
Former Vendor
Joined: Dec 2005
Posts: 306
Likes: 0
From: Richmond, VA
Originally Posted by Barnabas
Either I'm REALLY tired, or my brain cells are dying off at an insanely quick rate. I have no idea what you're talking about. lol
Unless you're talking about just gen. phys vs. special phys(quantum theory etc), but that makes no sense...ARG!
:impatient
Unless you're talking about just gen. phys vs. special phys(quantum theory etc), but that makes no sense...ARG!
:impatient
6th Gear
Joined: Sep 2002
Posts: 2,196
Likes: 0
From: Hampton, VA
Originally Posted by MSFITOY
Rapid expansion of gases cools rapidly...How that's achieved without moving parts (besides fast moving air) is the magic
OK OK, I said I'd shut up but I lied.
I understand the expanding gas theory. I also know that at some point the gas must be compressed. This compression creates heat.
It's the old closed loop can't create or destroy energy thing.
Where does this compression occur, where does the heat go, and where does this expanding gas thing happen?
Honestly I just want to understand. No doubting or finger pointing or questioning skills or whatever else negative may be extracted from the questions
OK?
4th Gear
Joined: Feb 2004
Posts: 492
Likes: 2
From: Mission Viejo, CA
The "magic" between the thick walls of the IC...hehe Perhaps there's a restriction of sorts somewhere in there. Combine that with flow of air, you have sort of a compression. But I didn't think there's enough difference for it to actually work.
OVERDRIVE
Joined: May 2003
Posts: 7,926
Likes: 40
From: Greensboro, NC
Originally Posted by obehave
OK OK, I said I'd shut up but I lied.
I understand the expanding gas theory. I also know that at some point the gas must be compressed. This compression creates heat.
It's the old closed loop can't create or destroy energy thing.
Where does this compression occur, where does the heat go, and where does this expanding gas thing happen?
Honestly I just want to understand. No doubting or finger pointing or questioning skills or whatever else negative may be extracted from the questions OK?
I understand the expanding gas theory. I also know that at some point the gas must be compressed. This compression creates heat.
It's the old closed loop can't create or destroy energy thing.
Where does this compression occur, where does the heat go, and where does this expanding gas thing happen?
Honestly I just want to understand. No doubting or finger pointing or questioning skills or whatever else negative may be extracted from the questions
OK?
4th Gear
Joined: Mar 2005
Posts: 429
Likes: 1
From: Newcastle, England, UK
Originally Posted by maxmini
Feelings I am all about that We have a well known road in my area . I have been up it at least 300 times and pretty much know each stone, tree, branch and crack from top to bottom. Going up hill it is a constant climb with a variety of curves both with one almost 90% turn. Back in my stock mini days it was mostly a second gear climb with some touches of third. After about 2 years of development on the car and myself i was able to take most of it in high in third with a drop to second at the tight 90. With the new IC I made two runs in mid 4th with a drop down to 3rd for the tight one.
We have a well known road in my area . I have been up it at least 300 times and pretty much know each stone, tree, branch and crack from top to bottom. Going up hill it is a constant climb with a variety of curves both with one almost 90% turn. Back in my stock mini days it was mostly a second gear climb with some touches of third. After about 2 years of development on the car and myself i was able to take most of it in high in third with a drop to second at the tight 90. With the new IC I made two runs in mid 4th with a drop down to 3rd for the tight one.
Originally Posted by maxmini
Numbers ? I don't need no stinking numbers the damn thing works
6th Gear
Joined: Jul 2002
Posts: 3,446
Likes: 9
From: L.A ca
Originally Posted by Cooper_Si
I can just see a brilliant promotional video in the making there !!!
ha ha loving it !!!
ha ha loving it !!!
Funny you mention that . I did part of DVD called " Chasing the Touge " on that hill.
I am glad you saw the humor in my " numbers " comment. Blazing Saddles wil never die
Randy
m7 tuning
6th Gear
Joined: Sep 2002
Posts: 2,196
Likes: 0
From: Hampton, VA
Originally Posted by maxmini
Funny you mention that . I did part of DVD called " Chasing the Touge " on that hill.
I am glad you saw the humor in my " numbers " comment. Blazing Saddles wil never die
Randy
m7 tuning
I am glad you saw the humor in my " numbers " comment. Blazing Saddles wil never die
Randy
m7 tuning
That's originally from
Treasure of the Sierra Madre
Originally Posted by Gold Hat
Badges? We ain't got no badges. We don't need no badges. I don't have to show you any stinking badges.
How's the weather? 
4th Gear
Joined: Oct 2003
Posts: 399
Likes: 0
From: Southern California
Originally Posted by ingsoc
That's NOT how you measure IC efficiency. Read my post on the previous page and learn the real way.
OVERDRIVE
Joined: May 2003
Posts: 7,926
Likes: 40
From: Greensboro, NC
Originally Posted by RECOOP
Please note that I posted "% reduction in temperature", not efficiency. I am quite aware of efficiency calculations, but I chose the numbers posted to show how one can easily manipulate data for selective purposes. Again, the main thrust of my post was the need for controlled experiments (data gathering) when comparing the different intercoolers. It very well may turn out that the new IC has very good comparative efficiency, but that remains to be shown.
6th Gear
Joined: Jan 2005
Posts: 1,719
Likes: 1
From: New Brunswick, NJ
Originally Posted by RECOOP
Please note that I posted "% reduction in temperature", not efficiency. I am quite aware of efficiency calculations, but I chose the numbers posted to show how one can easily manipulate data for selective purposes. Again, the main thrust of my post was the need for controlled experiments (data gathering) when comparing the different intercoolers. It very well may turn out that the new IC has very good comparative efficiency, but that remains to be shown.
I guess you didn't like my answer in the other thread.
Originally Posted by SpiderX
understanding the significance of pressure drop?
The amount of oxygen available is a function of two variables. Pressure and tempurature.
the molecular density is proportional to the absolute pressure divided by the absolute tempurature.
Things that raise pressure at fixed temp are good.
Things that lower temp at fixed pressure are good.
To figure out how good something is, look at the ratio of absoulte pressure divided by absoulte tempurature.
That's all there is to it!
hope that helps.
Matt