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07-04-2008, 02:04 PM | #1 |
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Cold Air Intake
I was curious what kinda of preformace increase we might see from a cold air intake?
I have never modded a car and I am not sure what the 128i would get out of it. |
07-04-2008, 03:13 PM | #2 |
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I can't say for sure, but you can bet it will be minimal. Almost certainly not enough to make a noticeable difference while driving.
To get something noticeable, I would bet you would have to do CAI + freer-flowing exhaust... and I'm not even sure that would do much. Maybe a little ECU tuning could help too. People with more experience on this can likely give you a more definitive answer.
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07-04-2008, 03:15 PM | #3 |
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I have been reading a little and some people are saying that cold air intake does more for a N/A car than FI car.....I just wanna know because I am deciding what mod im doing first.
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07-04-2008, 08:01 PM | #4 |
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07-04-2008, 08:08 PM | #5 |
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i was just reading some stuff from FI people lol
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07-05-2008, 09:50 AM | #9 |
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I'll find the posts a little later. Runnin out.
But the jist of it is that when you have turbos on a car, they get very hot, and no matter what the temp of the intake air, it will always get extremely heated b4 passing into the engine. An NA car takes the air directly, therefore there is no stage for that air to be heated up b4 entering. |
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07-05-2008, 09:56 AM | #10 |
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thats what i was thinking...all i know is on all these random site turbo cars put them on for the better intake noise
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07-05-2008, 04:31 PM | #11 | |
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I think the (misguided) point someone was trying to make about cold air intakes doing "more" for N/A engines was in regard to the temperature of the intake air, which is a different measurement than the volume (CFM) of air entering the engine. Drawing significantly hotter air into an N/A engine will almost certainly wreck more havoc on power and drivability than the gains provided by sneaking in a few extra CFM's with an open-style "hot air" filter. The idea with the CAI on a N/A motor is to get more air but also cooler air into the engine (or at least air that's not any hotter than what comes into the OEM intake system). This usually shows some reliable power gains on a N/A engine. Whether it's worth the money and hassle is of course the owner's discretion. |
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07-05-2008, 06:15 PM | #12 | |
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07-05-2008, 06:48 PM | #13 | |
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07-05-2008, 09:09 PM | #14 |
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What about BMW's CAI that they designed? specifically for the 128i
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07-05-2008, 09:22 PM | #15 |
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BMW released the CAI to be purchased but we haven't gotten one in stock yet. If anyone wants to try it out, I'll sell it for the cost that I pay to buy it from BMW + shipping
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07-05-2008, 11:09 PM | #16 |
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Not voting either way, but when people say CAI do nothing on Turbo cars, was that measured on a dyno or on the road? If just on a dyno, unless the dyno is sitting in a wind tunnel, it really doesn't tell you anything about how the CAI is performing.
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07-06-2008, 06:51 AM | #17 |
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most people that do real dyno test put a giant powerful blower infront of the car to get that effect...doing a dyno on a powerful engine w/o using it can cause problems
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07-06-2008, 08:18 PM | #18 | |
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This is the information that I have thought was true for the past 3 or so years, but I didnt feel like getting flamed |
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07-07-2008, 01:22 AM | #19 |
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09-12-2008, 03:39 PM | #20 | |
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Quote:
It'd be an okay place to start modification on the 128i |
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09-13-2008, 05:41 PM | #21 |
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You cannot compare the benefit of a CAI on an N/A car vs. an FI car. The benefits are always vehicle specific. An AEM intake for a Hyundai Tiburon will net 18+ HP but an AEM on a Civic will net 5 - 7 HP. I'm sure there are cars that can post better numbers and worse numbers. So which numbers do you use to compare to any random FI vehicle? Which FI vehicle numbers do you compare the other numbers to? Neither side of the argument is right or wrong, you can't compare apples to oranges to be a little cliche...
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09-17-2008, 07:58 AM | #22 | |
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it really depends on the motor and how restrictive the stock intake system is. my 2003 hyundai tiburon got 13 whp from its Cold air. (on end user dyno's) but my 1996 NA eagle talon was only supposed to gain 7 or so. keep in mind though, that the mods won't stack. dyno numbers for an exhaust alone may give you 8hp, and a cai 10, but together you may get 11 or 12. I'd assume the bmw intake system is designed well. |
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