Engine, Drivetrain & Forced-Induction Have Technical Questions or Done Modifications to the G35? Find out the answer in here! (View All Posts)
Sponsored by:
Sponsored by: CARiD

homemade supercharging?

Old May 19, 2005 | 07:47 PM
  #1  
raleighredG's Avatar
Thread Starter
|
Registered User
Joined: Jan 2005
Posts: 73
Likes: 0
From: NC
homemade supercharging?

Ok guys, bear with me on this one. A friend of mine at work is always asking lots of hypothetical questions, and this is one I could not answer. So I figured somebody here could explain it to me so I could pass the answer on to him. So here goes....Is it possible to run the A/C line back to the air filter and get increased horsepower? Knowing that cold air (and more air) results in more horsepower, what is stopping this from working? It seems like a homemade version of forced-inudction. So thanks to anyone who wants to respond to this.
Neither of us are going to do this, just want to know why or why this is not possible.
 
Reply
Old May 19, 2005 | 07:52 PM
  #2  
rcdash's Avatar
Registered User
iTrader: (4)
Joined: Oct 2004
Posts: 2,173
Likes: 32
From: NC
hmmm - maybe cause using the a/c compressor will use more hp than it can ever possibly create using feedback

interesting thought though
 
Reply
Old May 19, 2005 | 08:14 PM
  #3  
TINMAN's Avatar
Registered User
iTrader: (2)
Joined: Oct 2003
Posts: 6,316
Likes: 0
From: chino hills,ca
hmmm..is that mean if i drive my car in north pole,there'll be automatic HP increase?
 
Reply
Old May 19, 2005 | 09:06 PM
  #4  
godmans's Avatar
Registered User
iTrader: (22)
Joined: May 2004
Posts: 2,239
Likes: 4
well..let me keep it short, Forced induction refers to the addition of density of air by compressing the intake air..yet, what you are doing with the AC line is just keeping the air cold ..(which is partially what the CAI is aiming for, cold air intake), yet, you forgot the most important part: the compression part. Usually, stock turbochargers or superchargers run from 6 psi gauge pressure. In order to achieve that kind of compression in intake air, you absoultely need something more than an AC line...

cheers
 
Reply
Old May 20, 2005 | 06:07 AM
  #5  
skeleton_cru's Avatar
Registered User
Joined: May 2002
Posts: 17,096
Likes: 12
From: East Bay, Cali
Sedan
I would tell your friend to go ahead with that mod. Then you can laugh your @ss off, pick it up, put it back on, and then laugh it off again.
 
Reply
Old May 20, 2005 | 12:24 PM
  #6  
Q45tech's Avatar
Registered User
Joined: Dec 2003
Posts: 2,514
Likes: 5
From: Marietta, Georgia
Each 11F drop in temperature increases density by 1% whereas a 1.0 psi boost is 6.8% less parasitic losses to turn supercharger and inefficiency [70%] resulting in a temp increase after the supercharging.........as a rule of thumb these net down to 4.5-5% per psi depending on type and brand [without intercooler].

How to cool the intake air flow at WOT high rpms [214 ci/2= 107 x 6000 rpm/1728 x 0.6] =~~300CFM.

An evaporator is really only designed to drop thru air by 20-30-40F but it could flow that much air but it would create a restriction which would more than negate the gain from the temp drop...........not to mention the 5HP drop to turn the compressor.

What Ford patented was using an auxillary mini compressor to chill a lage quanity of water/antifreeze to drive an after the supercharger intercooler to give 15 seconds of cooler air........a nice idea in Summer heat with a supercharger.
 
Reply
Old May 20, 2005 | 02:53 PM
  #7  
Gmachine's Avatar
Registered User
iTrader: (2)
Joined: Jan 2005
Posts: 127
Likes: 0
There is no way the AC compressor could move the amount of air the engine needs to breathe, let him do it then laugh at him when he needs to buy a new AC compressor.
 
Reply

Trending Topics

Old May 20, 2005 | 10:49 PM
  #8  
BirdMan's Avatar
Florida G35 Club, General Member
Joined: Aug 2004
Posts: 410
Likes: 1
From: Florida
Originally Posted by Q45tech
Each 11F drop in temperature increases density by 1% whereas a 1.0 psi boost is 6.8% less parasitic losses to turn supercharger and inefficiency [70%] resulting in a temp increase after the supercharging.........as a rule of thumb these net down to 4.5-5% per psi depending on type and brand [without intercooler].

How to cool the intake air flow at WOT high rpms [214 ci/2= 107 x 6000 rpm/1728 x 0.6] =~~300CFM.

An evaporator is really only designed to drop thru air by 20-30-40F but it could flow that much air but it would create a restriction which would more than negate the gain from the temp drop...........not to mention the 5HP drop to turn the compressor.

What Ford patented was using an auxillary mini compressor to chill a lage quanity of water/antifreeze to drive an after the supercharger intercooler to give 15 seconds of cooler air........a nice idea in Summer heat with a supercharger.
Yea the Ford design was very neat, I think they called it the "Super Cooler," although I don't believe it has yet to make it into production. As far as the whole concept of cooling the air intake, two companies on the market right now are pursuing that idea. One being CryO2 and the other Design Systems. Design Systems actually as a pretty unique intake made of aluminum tube surrounded by a containuer. The owner eithier puts Dry Ice or Frozen CO2 into the container and viola, frozen intake tube. They actually manufacture one for the G35 but no word on price.
 
Reply
Old May 21, 2005 | 07:05 PM
  #9  
ozracer01's Avatar
Registered User
Joined: Aug 2003
Posts: 684
Likes: 0
From: Illinois and NC
how about injecting R134 Gas into the Intake line, kinda like how NOS works?

Just a thought..?
 
Reply
Old May 21, 2005 | 08:18 PM
  #10  
BirdMan's Avatar
Florida G35 Club, General Member
Joined: Aug 2004
Posts: 410
Likes: 1
From: Florida
Sorry I'm not familiar with R134 Gas, but maybe you could enlighten me. If its race gas, no that would not be a good idea. Nitrous is actually a very complex additive that, contrary to the beliefs of many, does a lot more then simply combust. Thats why (if put into the properly modified engine at the right shot) it works so well.
 
Reply
Old May 21, 2005 | 08:27 PM
  #11  
Msedanman's Avatar
O.F. Administrator
Staff Alumni
iTrader: (4)
Joined: Jun 2002
Posts: 30,341
Likes: 9
From: Cambridge, Ont. Canada
R134 is A/C refigerant (that replaced R12 some years ago).
No idea how it would burn......I wouldn't want to try it.
C.
 
Reply
Old May 21, 2005 | 09:44 PM
  #12  
narkotic's Avatar
Registered User
Joined: Aug 2003
Posts: 797
Likes: 0
From: Orange County, CA
I hope I never reach this level of boredom. Please find another hobby, and just use your car for wht you bought it for, going to the grocery store.

 
Reply
Old May 22, 2005 | 01:53 AM
  #13  
DirtyMechanic's Avatar
Registered User
Joined: Apr 2005
Posts: 10
Likes: 0
From: Alpharetta,Ga.
Q: How does nitrous work?
A: Nitrous oxide is made up of 2 parts nitrogen and one part oxygen (36% oxygen by weight). During the combustion process in an engine, at about 572 degrees F, nitrous breaks down and releases oxygen. This extra oxygen creates additional power by allowing more fuel to be burned. Nitrogen acts to buffer, or dampen the increased cylinder pressures helping to control the combustion process. Nitrous also has a tremendous "intercooling" effect by reducing intake charge temperatures by 60 to 75 degrees F.





some people. sorry alot of people should really know how NOS works before they open their big mouth. first of all NOS is N O2 nitrogen and oxygen nothing there is flamable by themselves. but when added with oh say FUEL something can come or it. Everyone should read some stuff from

http://www.holley.com/HiOctn/ProdLin...o/GenInfo.html

before opening their mouth again.
 
Reply
Old May 22, 2005 | 03:36 AM
  #14  
ozracer01's Avatar
Registered User
Joined: Aug 2003
Posts: 684
Likes: 0
From: Illinois and NC
Originally Posted by DirtyMechanic
Q: How does nitrous work?
A: Nitrous oxide is made up of 2 parts nitrogen and one part oxygen (36% oxygen by weight). During the combustion process in an engine, at about 572 degrees F, nitrous breaks down and releases oxygen. This extra oxygen creates additional power by allowing more fuel to be burned. Nitrogen acts to buffer, or dampen the increased cylinder pressures helping to control the combustion process. Nitrous also has a tremendous "intercooling" effect by reducing intake charge temperatures by 60 to 75 degrees F.





some people. sorry alot of people should really know how NOS works before they open their big mouth. first of all NOS is N O2 nitrogen and oxygen nothing there is flamable by themselves. but when added with oh say FUEL something can come or it. Everyone should read some stuff from

http://www.holley.com/HiOctn/ProdLin...o/GenInfo.html

before opening their mouth again.
...As i stated....it was just a thought. It was my sarcastic side(Guess i should work on my "forum humor")
 
Reply
Old May 22, 2005 | 04:09 AM
  #15  
BirdMan's Avatar
Florida G35 Club, General Member
Joined: Aug 2004
Posts: 410
Likes: 1
From: Florida
Originally Posted by DirtyMechanic
Q: How does nitrous work?
A: Nitrous oxide is made up of 2 parts nitrogen and one part oxygen (36% oxygen by weight). During the combustion process in an engine, at about 572 degrees F, nitrous breaks down and releases oxygen. This extra oxygen creates additional power by allowing more fuel to be burned. Nitrogen acts to buffer, or dampen the increased cylinder pressures helping to control the combustion process. Nitrous also has a tremendous "intercooling" effect by reducing intake charge temperatures by 60 to 75 degrees F.





some people. sorry alot of people should really know how NOS works before they open their big mouth. first of all NOS is N O2 nitrogen and oxygen nothing there is flamable by themselves. but when added with oh say FUEL something can come or it. Everyone should read some stuff from

http://www.holley.com/HiOctn/ProdLin...o/GenInfo.html

before opening their mouth again.
Ok did I read that right or did you say oxygen isn't flammable? Oxygen is incredibly combustive and is the sole reason things are able to burn and we have fire today. Furthermore the fact the Nitrous is an oxide containing 36% O2 as apposed to the Earth's atmosphere of which is made up of about 15% O2, accounts for hp gains in internal combustion engines. Under normal operation, engines only recieve the 15% atmospheric O2. Theoretically if there was any way you could add pure O2 to an engine, it would react in such a powerful manner that you could kiss your car and your *** goodbye. The nitrogen (similar to what you mentioned above) regulates the O2 reaction, keeping it from going out of control and leading to an explosive end result.
 
Reply

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 04:25 AM.