YES WE WANT TO KNOW!

 

Sorry, I should have mentioned that this is only true at constant volume, which is in fact the case inside our Mini's intake. In other words, if you take a closed container of air at room temp, then heat it up, both the pressure and viscosity increase. So, cooler low pressure air, like in Mariokart's case, can be moved with less energy than hotter high pressure air.

 

I own a GP and a conv. 56. I would venture to say that a GP would not be considered heavily modded. When my GP was bone stock it ran 14.5 in the 1/4. The 56 runs 14.9. Unless I got a lemon engined 56, or a Wed. build GP, they are not even close. With a full Miltek, 2% CP, DFIC, Helix CAI, and 12 lb. wheels (still not considered "heavily modded") the 56 needs to find a full second. Love the 56 though, it's definately a bit more refined. Great comfy seats too!!

 

the 56 is available in conv?? I thought they had to run it two more years.

 

I meant Auto. Bought the car for my girl. -S

 

Yep - it may be counterintuitive, but cold gases actually flow more easily than hot gases, unlike liquids, where hot liquids generally flow more easily than cold liquids (think hot maple syrup compared to cold maple syrup).

For anyone that's willing to sit through another of my "physics explanations", here's the reason why:

First, "temperature" is nothing more than a measure of the amount of random molecular motion in a substance. The hotter something is, the faster the molecules are moving randomly, in all directions. As the substance cools, the random molecular motion slows down.

Second, the molecules in a gas are separate from one another and haven't formed bonds with each other - they're each going their own way, doing their own thing.

In a liquid, some of the molecules have begun to form bonds with each other and move together, but not all of the molecules are bonded together yet - there are still groups of molecules that are moving in different directions than other groups.

In a solid, all of the molecules are bonded with all of their neighbors, forming one vast interlinked "blob".

Lastly, the "viscosity" is just how resistant a substance is to flow.

Now, as to why liquids respond differently than gases in terms of viscosity and temperature.

Imagine trying to herd a bunch of rowdy schoolchildren through a twisty maze of little passages, all alike**. The kids will literally be bouncing off of the walls and off of each other. Some of them will be moving forward, some will be moving backward, and some will be moving sideways. This is equivalent to a hot gas (individual molecules with no interconnections, moving rapidly in all directions), and the difficulty you have in pushing the kids through the maze is equivalent to the high viscosity in a hot gas.

Now calm the kids down some (reduce the temperature on the molecules). Now some of the kids will still be bouncing around, but not as quickly. The kids will also be crowding closer together, since there's not as much "bouncing around" to keep them apart. Since they're crowded closer together now, even the kids that want to move sideways or backwards will find themselves dragged along by all of the kids moving forward. This is equivalent to a cold gas, and the viscosity is decreasing (the kids are easier to herd forward now).

Calm the kids down even further, and they'll crowd even closer together. The random bouncing around has diminished greatly, and some of the kids have even begun to link arms and form small groups. This is equivalent to the "hot liquid" stage. The kids are still pretty easy to push through the maze, but it's getting harder, because some of the larger groups with linked arms are hard to push through some of the passages.

Now, as the kids calm down even more, almost all of the kids have linked arms with most of their neighbours, and they're crowding even closer together. They're getting really hard to push through now, because the kids have formed several large loosely-linked groups, and those groups are really tough to push through the passages.


As a final step, calm the kids down even further (reduce the temperature even more), and now they all crowd as close together as the possibly can, and each kid is grabbing on to all of his neighbours as tightly as he possibly can. No kid is left unlinked, and the links are very tight now. Obviously, the mass of kids is going to be almost-impossible to move through the passages, since they've basically all joined together into one rigid mass. This is the "solid" stage, and shows why most solids flow extremely slowly (if at all).


So, with a gas, cooling it down serves to "relax" the individual molecules and move them closer together without actually linking up, so it's easier to flow (viscosity goes down). But with a liquid, cooling it down promotes more linking between the individual molecules, making it *harder* for it to flow (viscosity goes up).

**Bonus points for anyone that recognized the "Zork" reference in the beginning of the problem.

 

I'd never heard anyone claim a stock R56 was faster than a stock GP. I *have heard claims that a stock R56 is faster than a stock R53 JCW, though. Does anyone happen to know the 1/4-mile time for a stock R53 JCW?

 

If you start with the hot air.........

You can but you can't.

You are right. Perhaps I should not have used the "cold air is harder to move". I was refering to the IC. We're on the same page. Too much over simple explanation on my part making it much harder to understand.......

If you fill a baloon ( the closed container ) with hot air & put it in the fridge it will decrease in size ( volume ). So at the intake end of the IC there is the hot expanded air, at the other the colder denser air ( less volume ). With less volume there will be a presure drop. The colder the harder it is to maintain the presure at the IC exit. This is what I was refering to, the better the IC the harder to get more cold air to the engine ( loss of boost ). In Mario's case, his IC is doing a good job......

 

Hey guys, I finally took a pic with a crappy phone camera. I can't seem to find the battery to my good camera. This pic shows the intercooler brakets on and the M7 AeroGel under the MM air/water.
M

 

Looks good Mario.

Oh and by the way, why didn't you change your boots while going with W2A system?

 

oops double post,

edit.

 

I didn't really feel I need to but maybe blue ones from Alta just for the looks.

 

Mario congrats on joining the air-water club don't worry my boost has droped to 13psi where i was running 17ish like yourself i have a 15% and a 2%. don't worry i figured out a way to open the boost gauge and move the gauge face so it shows we are boosting 18psi or more but on idle it shows your vacumm at -5psi hehe.
with a 19 and a 2 i was seeing 15 psi but it falls of on top for obvious reasons.

btw scott great explanation


Thanks,
Danny D
MINICORSA
818-994-0338

 

Thanks Bro, I guess we are a small club. I'm very happy with the kit and how it easy it was to install. I love the look of the front heat exhanger. I can't believe how cool it runsSo I guess I won't worry about the 2psi that I lost. I just got off the phone with George from Mini Madness and he said this is "normal" their race car did the samething.
I guess the only thing I can do now is to get my intake manifold port matched. I think I'm running out of stuff to do :-(
Whats your next step?
Mario

 

hehe i just got back from the track and found many things to do. Jan and I have some plans for my car and you will hear abou tit when it's done. once again congrats on the water/air you will learn there is nothing better

 

I ran 15.1 @ 92 MPH Stock on s-lites w/run flats... this was the last thing I did to figure out that my car was truley strong... no one belived the Dyno of 162 WHP in 102 degree heat... so we went to the track... LOL BAM!

 

Mario, did you take any pics while you did the install? Can we get a pic of the air portion of the IC? Also how hard was it to do? Thanks.

 

So whats the diff. between a GP and a JCW? Hp. wise.

 

well I know of a GP that pulled 186 WHP stock... so that's strong... with the added wieght loss that's a quick mini...

as for the JCW.... I never saw one that was dynoed... however, beating up on the JCW cars when mine was stock is what lead me to Dyno and then go to the track... I had alot of MINI friends with moded and JCW cars who could not belive I could keep up or pass them... and this was jsut straigh line roll ons... so driver wasnt' an issue...

 

JCW is said to have 197 whp and the later years have approximately about 200-205 or there about. The GP I'm no so sure of but believe it to be somewhere around the 180-190 range.

Someone correct me if I'm wrong on the numbers.

 

Here are two more poor pix. The install was not too bad. Mini Madness has all their instructions on their website PDF format. The install was about 4 hours but I did some of my own ways. I put the pump in a different spot and stuff like that. Now I could do it in under 2 hours.
Mario

 

nice job!

 

I have a water to air too and it's really amazing. It's not from MINI MADNESS but it's works also great!

 

Hey thanks . looks great .

 

Nice looking R56 you have there . But I'm partial to PS Minis . Those are the stripes I want on my car .