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Cold Air Intake vs. Intercooler question.

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Old Feb 26, 2002 | 01:20 PM
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Cold Air Intake vs. Intercooler question.

I was thinking. What's the difference in the end result of a CAI and an Intercooler? What's the difference in taking warm air, cooling it and then sending it along to the trottle body (intercooler) versus simply getting cold air in the fist place (cold air intake)?! In fact, since you lose a pound or so of boost with an intercooler, wouldn't it be better to just have a cold air intake? What am I missing? Thanks in advance for the answers.
Old Feb 26, 2002 | 01:24 PM
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Not all of the heat is just from intake.
Old Feb 26, 2002 | 01:58 PM
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This is why we wneed a boost specific forum...

Almost all of the heat in a boosted system comes from compressing the air, not ambient temps...
Old Feb 26, 2002 | 02:00 PM
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Originally posted by mzmtg
This is why we wneed a boost specific forum...
That is like being Maxist, degrading those that don't have boost.........j/k Mr. Sir Moderator mighty god.
Old Feb 26, 2002 | 02:11 PM
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I just finished my cold-air charger project. And WOW, the gains in the low and midrange are back!...all i can say is try it to believe it.

I'll take pictures and post a write up as soon as it stops snowing.

In the meanitime, here's a quick description of what I have...A JWT pop charger with the new filter element (opened at top). I ran a scoop under the fog and routed it with pumbing pipes to connect it to the opening of the filter, essentially "charging the filter" with constant cool air....thus getting the bennefits of a CAI AND a Pop charger!
Old Feb 26, 2002 | 02:19 PM
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Re: Cold Air Intake vs. Intercooler question.

Originally posted by ptatohed
I was thinking. What's the difference in the end result of a CAI and an Intercooler? What's the difference in taking warm air, cooling it and then sending it along to the trottle body (intercooler) versus simply getting cold air in the fist place (cold air intake)?! In fact, since you lose a pound or so of boost with an intercooler, wouldn't it be better to just have a cold air intake? What am I missing? Thanks in advance for the answers.
Ideal is to have both...

The process of 'compressing' via a Turbo or S/C increases the temperature of the gas (PV=nRT?). Plus the 'compressor' itself is hot due to engine oil lubrication/friction/exhaust... mostly on turbos but also S/Cs to a certain extent.
Old Feb 26, 2002 | 02:24 PM
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:o)

Originally posted by Str8ridin
I just finished my cold-air charger project. And WOW, the gains in the low and midrange are back!...all i can say is try it to believe it.

I'll take pictures and post a write up as soon as it stops snowing.

In the meanitime, here's a quick description of what I have...A JWT pop charger with the new filter element (opened at top). I ran a scoop under the fog and routed it with pumbing pipes to connect it to the opening of the filter, essentially "charging the filter" with constant cool air....thus getting the bennefits of a CAI AND a Pop charger!
Yes str8! That's EXACTLY what I was thinking. Instead of bringing the filter to cold air, why not bring cold air to the filter?! So you can tell a difference, huh? Good. What size diameter pipe did you use and where exactly did you route it? If I do this, can I keep the stock K&N SC filter? Thanks.
Old Feb 26, 2002 | 02:36 PM
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Re: :o)

Originally posted by ptatohed


Yes str8! That's EXACTLY what I was thinking. Instead of bringing the filter to cold air, why not bring cold air to the filter?! So you can tell a difference, huh? Good. What size diameter pipe did you use and where exactly did you route it? If I do this, can I keep the stock K&N SC filter? Thanks.
Yes, the gains were definately felt. If your filter doesn't have an opening at the top, it won't be that effective to effectively "ram" and "charge" the entire filter with cold air. Turbulent air hasn't been an issue so far. And my top speed is up 4-5 mph.

I'll post a write up with pics and parts as soon as it gets nicer outside...
Old Feb 26, 2002 | 03:43 PM
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the boost pressure you lose due to the Air to Air Aftercooler (well in ur words intercooler) would be neglected with the amount of cooler air you get it.

imho. SC CAI, (a REAL cai like i have sucking air from the fender wall and having it rammed in there via the front air ducts) and having an IC would be pretty nice.. i'd say gains of up to 20 just by having denser air into the car..

or you can do what Keving did. and do a water injection mist in the intake piping that would cool down the air intake temps of about 20 degrees or so....

think MISTY Mate! (TM)
Old Mar 12, 2002 | 09:59 AM
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:o)

So what's the difference between an inter. and after. then Chest.?
Old Mar 12, 2002 | 12:09 PM
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Re: :o)

Originally posted by ptatohed
So what's the difference between an inter. and after. then Chest.?
Hey ptatohed, here's the write up i was talking about above if you haven't already seen it...

http://forums.maxima.org/showthread.php?threadid=102082
Old Mar 12, 2002 | 12:28 PM
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Re: Re: :o)

Originally posted by Str8ridin

Hey ptatohed, here's the write up i was talking about above if you haven't already seen it...

http://forums.maxima.org/showthread.php?threadid=102082

Thanks man. What kind of hose is that? Pool hose? And does your little scoop underneath ever hit the ground? Thanks again.
Old Mar 12, 2002 | 12:33 PM
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Re: Re: Re: :o)

Originally posted by ptatohed



Thanks man. What kind of hose is that? Pool hose? And does your little scoop underneath ever hit the ground? Thanks again.
Yeah, I think it's a pool hose. I just made sure that it's a type of hose that doesn't crease when bent. Also, it's preforated on the outside and not the inside...which is good because it allows the air not to slow down while traveling through the tube. As far as teh scoop, I haven't had a problem yet. It doesn't hang lower than my exhaust does...but I have to be careful. It's detachable though in the event that I hit something (parking curb, snow chunk etc.)
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