Don't get me wrong Ganiman, I've enjoyed this thread very much. In fact, I find it amuseing. All these mathmatical formulas and scientific charts, I'll bet most of us don't have a clue as to what they're talking about, or maybe it's just me My point was that Lethal just wanted some info. about the blowers and sometimes others, though unintentionally, highjack a thread and forget what the original post was all about. I hope Lethal 427 found this whole thing very helpfull. I also would've liked to ride in trucks that had both types of blowers but I didn't know anyone who had them.

 

In the Ideal Gas Law, n = the number of moles (1 mol = 6.02 x 10^23 molecules) of gas present. When volume is constant, increasing pressure increases temperature as well, but in a real world setting, n has to increase. The T/P relationship is a direct relationship (i.e. When T ^, P^) but it's definitely not linear (T ^ by 1, then P ^ by 1) . Holding n constant and making the T/P relationship linear would mean that the supercharger's method of increasing pressure is just getting really, really hot as opposed to forcing more air into the same space.

In short, how can n always equal 1?

 

Trying to break it down so others can understand. For Calculations n is usually equal to 1 or it gets real complicated. For most of these equations you must assume n=1. Good God how many times have I started a problem off with n=1... But you are right, In the real world it does change to a certain degree..

But linear it is. not neccessarly a 1 to 1 relationship. It could be 1 to 10 or 1 to 20 but it's still linear (In a perfect setting). In the real world, and because no blower is perfect the line looks more like .. I wish I could draw a graph.. a line the goes from the lower left corner to the upper right with a slight "bowl" dip to it.

 

Soooooo.... getting back on topic....
The one thing no one has mentioned about this is the overall affect of having either an Air/Air or an Air/Water core mounted in front of the factory cooling pack. You will affect the overall engine cooling and AC performance due to the increase of the ambient air temperature passing through the IC and passing into the cooling pack. This can have an adverse affect on both AC head pressure resulting in decreased AC performance and also on the overall engine cooling capability.
We did extensive testing in AZ just prove out the engine cooling system and intercooler performance for trailer tow and used a towing dyno to really tax the systems. Our kit is very safe but there is an overall affect. A lean calibration will only make this problem worse as it compounds the problem of heat absorbtion and heat rejection by driving the chamber temperatures up. As in a previous post on the 5.0 class, at 8:1 they must be counting on the fuel to do all of the cooling.

 

But only if your heat exchanger is mounted infront of your Radiator/AC condenser correct? I can agree with that, to a certain extent. edit...

Edit: after reading my own writing I can see what you are saying.. IF the heatexchanger is mounted infront.. I don't have that problem haha..

 

ADT,

I will not trouble you with any more physics but the fact of the matter remains. Lethal did get his answer!
1.) It was, and never will be, a simple answer;
2.) One must understand the principles behind such a complex device prior to dogmatically supporting one s/cer vs. another;
3.) One persons' s/cer may be bread and the other's fodder; it all depends on what you want to do with it.

I disagree with Brahmus on many issues and unfortunately, despite his best efforts to rationalize them, I still disagree. But this does not take away from the necessary mind expansion so vital to the general public not getting ripped off with hype. I would down a pint with him any day or night and I would offer. I truly enjoy people able to hold intelligent conversations and would continue but for comments expressing dismay over the expression of scientific data so vital to asnwering the very question that started the debate. Perhaps it's just not the right audience.

 

[QUOTE=dogedoc]ADT,

I will not trouble you with any more physics but the fact of the matter remains. Lethal did get his answer!
1.) It was, and never will be, a simple answer;
2.) One must understand the principles behind such a complex device prior to dogmatically supporting one s/cer vs. another;
3.) One persons' s/cer may be bread and the other's fodder; it all depends on what you want to do with it.

Dogedoc, with all due respect.

1. Lethal was not looking for an answer. He wanted advice and opinions on the different blowers on the market for his truck. To give answer would be like saying "Whipple is THE best for your truck." So far to the best of my knowledge, no one has said anything like that yet.
2. B/S, nuff said.
3. I disagree, some like positive displacements, some like centrifugals. both will give great performance. I bought my Procharger for towing and I works fine. Most on this forum would suggest using a roots or twin screw, and if you remember in an earlier post I made, I said that I was concerned that the pos. disp. blower would over stress my drive train too much considering I'm pulling almost 9000#. The power is there and I don't care what P=T^n=1 or what ever. Look, many of us are gear heads & knuckle busters, who are just looking for a little extra power and to have some fun. I suggest you start a new thread on the physics of superchargers. That would be fun

 

ADT,
Just the answer I supsected from you. Thank you for proving me right.
Scotty, beam me up. No .... well you know the rest.

 

You two oughta make your own forum, like an ongoing info -fest. Real good stuff guys, helped me out anyway.

 

Yes, you are right. We may not be the right audience for that kind of mumbo jumbo. I've never seen so much bullsh-- on a thread where someone just wanted a little help. YOU are not helping with your info. It almost sounds like you're just trying to showoff. Save it. We're here to seek help to solve our issues and help others with their issues related to blowers You agree with Brahmus and he agrees with you and UCF178 disagrees with both of you and now you disagree with Brahmus. What have we all learned, NOTHING

 

It is unfortunate, but lately allot of threads in this forum have become so deep in BS you need a shovel and a ladder to get out. People seem to think by quoting gas laws and finding formulas from their dusty text books that they prove their superior intelligence. It holds true, the more intelligent you are the better you to are able to explain things on the level of the common man. We need a separate forum for the science nerds to duke it out mathematical style. No one without a pocket protector and slide rule allowed!

The first response will be that I am just an idiot and got lost in the complex though process that has been displayed before me, I assure you this is hardly the case. I agree that people do not come for a debate, nor do they typically ask a question expecting a science lesson. Useful advice and experience is far more valuable to others than flexing your seemingly superior intellect……rant finished, I need a beer.

 

Lowfast

 

I'd rather see a thread "degenerate" into an applied science discussion than the usual e-***** waving that goes on sometimes. If you don't like the scientific discussions...stay out of them. Because that's gonna happen on any automotive performance discussion in a forum that's worth posting on. I'd rather read discussions by people with engineering and applied mathematics/science degrees than browse through the usual lame rhetoric that's de rigeur.

 

hahahaha Me bolt on blower.press little pedle and GO FAST
And thats all I need to know for now.
Good reeding though!!

Phil

 

I have enjoyed the discussion so far and find it useful to know the in's and out's of how a Supercharger works and the characteristics of it. I believe that if you don't enjoy the conversation, why put yourself through aggrevation of reading something you do not want to hear anyway.

Yes, this discussion has gotten pretty deep sometimes and has got off track a few times, but the overall discussion has been good and opened my eyes to how the supercharger truly works.