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-   -   I'm new to the engine mod... What does the CAI do? (https://maxima.org/forums/5th-generation-maxima-2000-2003/23126-im-new-engine-mod-what-does-cai-do.html)

tomI30 Mar 26, 2001 11:56 PM

I'm sorry.. I'm getting a magna flow muffler tomorrow and I've seen all this stuff about the Cold Air Intakes. How does this affect the car? And is there any aftermaket ones for the 2k Max? Sorry if I'm sounding a little engine dumb at the moment....

Tom 2kGXE...

maximus826 Mar 27, 2001 01:44 AM

magna flow
 
hey, cold air intakes basically take cold air from right near the wheel well...cold air is supposed to be a lot better for performance.....by the way, where did you get your magna flow exhaust and how much did you pay for it???

DNA21 Mar 27, 2001 04:46 AM

Cold Air Intake
 
Palace Racing makes a cold air intake for the 5th gen. Just remember that you have to drill a 3.25" hole in the sheet metal to get the air scavenger down by the ground.

http://www.cattman.com/intake.shtml#cai

Just remember that with the air scavenging unit next to the ground it is alot easier to suck in alot of water (terminal for the engine). I would install an AEM intake bypass valve (Sport Compact Car did an article on it in the April issue).

UMD_MaxSE Mar 27, 2001 05:09 AM

Cold air is better for combustion since it is denser and has more oxygen in it. The more oxygen your engine has, the better combustion.

OzziSVT Mar 27, 2001 05:52 AM


Originally posted by UMD_MaxSE
Cold air is better for combustion since it is denser and has more oxygen in it. The more oxygen your engine has, the better combustion.
Dude, I think you are over simplifying, the colder he air is the denser it is, and hense it has more of EVERYTHING in it. The oxygen is minial, the real benefit is from the enthalpy increase during the Carnot cycle (ICE cycle). The greater increase in temp during combustion, the more power you get. i.e going from say 32°F to 950°F will net more power than going from 50°F to 950°F. Also reduced intake temps limit enigne knock, and hence your ECU will advance the ignition timing more to increase power.
p.s. yes I do have a degree in Mech. Eng - with a thesis on Turbocharging Diesel Engines.

UMD_MaxSE Mar 27, 2001 07:02 AM


Originally posted by OzziSVT

Dude, I think you are over simplifying, the colder he air is the denser it is, and hense it has more of EVERYTHING in it. The oxygen is minial, the real benefit is from the enthalpy increase during the Carnot cycle (ICE cycle). The greater increase in temp during combustion, the more power you get. i.e going from say 32°F to 950°F will net more power than going from 50°F to 950°F. Also reduced intake temps limit enigne knock, and hence your ECU will advance the ignition timing more to increase power.
p.s. yes I do have a degree in Mech. Eng - with a thesis on Turbocharging Diesel Engines.

hehe...I guess I did oversimplify it :) ....I never took a real thermo class other than the minimal stuff they teach in physics...I am an electrical engineer anyways so I rarely see any of that stuff. Thanks for the useful info though....


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