cold air intake?
09-27-2002, 08:23 PM
#2
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Join Date: Jun 2002
Location: Alameda, CA
Posts: 903
Re: cold air intake?
A cold air inrake isn't gunna give you that much power. All it does is get the outside ("cold") air, which is not affected by the engine heat, into your intake manifold. Some say that this is THE way to go. I say look at the stock intake and see where the air is comming from. Hmmmmm.....looks like it's pumping un-affected air doesn't it? If you want the look and want to spend the $$$ go for it. Me, I think the stock design is just fine. But try K&N, I heard they have good stuff.
09-27-2002, 09:03 PM
#3
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Re: cold air intake?
People in my club tell me the K&N filter is a must.
You honestly like where they put the filter on the car? Not tryin to be funny.... Just I felt different, but you may know more than I do or something I don't. So you may be the one to change my mind.
I was going to do it, but wasn't gonna spend much money and just make it out of PVC piping. Not a hard "surgery" to do.
You honestly like where they put the filter on the car? Not tryin to be funny.... Just I felt different, but you may know more than I do or something I don't. So you may be the one to change my mind.
I was going to do it, but wasn't gonna spend much money and just make it out of PVC piping. Not a hard "surgery" to do.
09-29-2002, 01:54 PM
#5
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Re: cold air intake?
Red, I think you may have to be put in "time out" for that comment...haha
Cold air intake is useful, but the difference is not going to be great. If getting cooler intake air was useless due to the heating of the intake system, nobody would bother with intercoolers.
Will cold air intake help? Yes
Big difference over stock or K&N cone? nope
Do I care to have one? doesn't matter to me
<font color=blue><h2>Engloid Performance!!!</font></h2>
Cold air intake is useful, but the difference is not going to be great. If getting cooler intake air was useless due to the heating of the intake system, nobody would bother with intercoolers.
Will cold air intake help? Yes
Big difference over stock or K&N cone? nope
Do I care to have one? doesn't matter to me
<font color=blue><h2>Engloid Performance!!!</font></h2>
09-30-2002, 11:07 AM
#6
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Posts: n/a
Re: cold air intake?
a) stop hanging around with Honda 2NRs.
b) cold air intake is not going to do anything significant.
c) allowing more air in easier is more important than getting cold air.
all this adds up to:
buy a K&N filter (or other cone filter if you want) and install in the stock location removing the sotck air box.
http://zbum.nissanpower.com
b) cold air intake is not going to do anything significant.
c) allowing more air in easier is more important than getting cold air.
all this adds up to:
buy a K&N filter (or other cone filter if you want) and install in the stock location removing the sotck air box.
http://zbum.nissanpower.com
10-04-2002, 08:57 PM
#7
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Posts: n/a
Re: cold air intake?
I haven't found anyone who mfg(s) a Cold Air Induction System for the z31. Here's a url that describes an alternate K&N MOD system ..
http://pegasus.cc.ucf.edu/~mi584772/intakeinstall.htm
However .. MSA markets something called a POP-Charger Air Filter System for 300ZX n/a and turbos
http://pegasus.cc.ucf.edu/~mi584772/intakeinstall.htm
However .. MSA markets something called a POP-Charger Air Filter System for 300ZX n/a and turbos
10-04-2002, 10:46 PM
#8
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Re: cold air intake?
Look, a cold air intake's theory is good...yes colder air will be denser air thus getting more air to the engine giving it a hotter burn...But the only flaw with almost every, if not all, cold air intakes are they don't isolate the intake manifold...the air will get heated on its way to the engine by these extremely hot nissan engines...to true cold air into your engine it is gonna take a little more then just some cold air intake for a hundred bucks...
10-05-2002, 03:48 PM
#9
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Join Date: Feb 2002
Location: Saskatoon, SK
Posts: 2,893
Re: cold air intake?
i say [censored] all intakes and k&n come to canada here its about 0 to -10 each day (celsius) theres your cold-[censored]-air HAHAHA ahhh yeah im gonna go pick up a K7N to make it breathe better
10-06-2002, 05:40 AM
#10
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Posts: n/a
Re: cold air intake?
Cold air never truely works on a turbo car. Think about it, the turbo is using exhaust for to power the intake.. there is going to be massiave amounts of heat! Anyone that has taken high school science knows that the hot air expands, that's why less air can get in, making it runn less effiecent. As with Nitrous Oxide, (N20 - stands for 2 nitrous molecules, one oxygen.. and it's not flammable kids.) it makes the air cooler, allowing it to compress more, causing more air being able to be sucked in. Fire can't burn without oxygen.. so there you go.. this also work in turn for a secondarary Intercooler. I've read it's 40% more efficent in a 200 hp car with a 50hp extra shot of nos than just running an intercooler. Believe what you want though. The Cone filter works *in theory* as to let more air pass through the intake. Once again, more O2, more efficency. On a turbo car, widen the exhaust and don't use a cat, it creates more of a vacume effect, giving you a better throttle response. Hope this helps.. someone. LoL
Later,
Daniel
Later,
Daniel
10-06-2002, 09:05 AM
#11
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Posts: n/a
Re: cold air intake?
a few things about turbos and N2O...
Turbos are two fans connected to each other by a shaft. The exhaust does NOT mix with the intake air. The intake air is NOT heated by the exhaust. The intake air gets hotter because it has been pressurized. High school science taught most of us that pressure = volume times temperature times a constant. Since the pressure goes up, and the volume of air doesn't change, the temperature has to go up. That is why the air gets heated in the intake. An Intercooler is designed to cool the air AFTER the turbo and BEFORE the throttle body. This colder air allows the car to put more air into the actual cylinders (again, see the ideal gas law).
With N2O, the N2O enters the cylinder and under compression it vaporizes (turns from a liquid to a gas) and as a result, it cools.
As far as how cone filters work, there is nothing mysterious or magical about it. It's a simple matter of surface area. The flat filter that is in the stock box actually does have a lot of surface area. The main reason the cone filter allows more air into the intake is simply because the inlet for the stock air box is tiny. If you have a stock air box, look at the intake. I've never actually measured it, but the inlet tube looks like it's about 1-1/2 to 2" in diameter. Compare this with the diameter of the AFM and the throttle body and you will find that this is the most restrictive piece of the intake.
Websites for reference:
Turbos:
<a href="http://www.howstuffworks.com/turbo.htm">http://www.howstuffworks.com/turbo.htm</a>
NOS:
<a href="http://www.howstuffworks.com/question259.htm">http://www.howstuffworks.com/question259.htm</a>
http://zbum.nissanpower.com
Turbos are two fans connected to each other by a shaft. The exhaust does NOT mix with the intake air. The intake air is NOT heated by the exhaust. The intake air gets hotter because it has been pressurized. High school science taught most of us that pressure = volume times temperature times a constant. Since the pressure goes up, and the volume of air doesn't change, the temperature has to go up. That is why the air gets heated in the intake. An Intercooler is designed to cool the air AFTER the turbo and BEFORE the throttle body. This colder air allows the car to put more air into the actual cylinders (again, see the ideal gas law).
With N2O, the N2O enters the cylinder and under compression it vaporizes (turns from a liquid to a gas) and as a result, it cools.
As far as how cone filters work, there is nothing mysterious or magical about it. It's a simple matter of surface area. The flat filter that is in the stock box actually does have a lot of surface area. The main reason the cone filter allows more air into the intake is simply because the inlet for the stock air box is tiny. If you have a stock air box, look at the intake. I've never actually measured it, but the inlet tube looks like it's about 1-1/2 to 2" in diameter. Compare this with the diameter of the AFM and the throttle body and you will find that this is the most restrictive piece of the intake.
Websites for reference:
Turbos:
<a href="http://www.howstuffworks.com/turbo.htm">http://www.howstuffworks.com/turbo.htm</a>
NOS:
<a href="http://www.howstuffworks.com/question259.htm">http://www.howstuffworks.com/question259.htm</a>
http://zbum.nissanpower.com
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