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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 08-17-2010, 10:40 AM
speedninja speedninja is offline
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Location: Mishawaka Indiana
 
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Exclamation Stock CAI or After Market

which is better i dont know which is better i have a CAI but does it do more than the stock one afe has some that gives you 2-8 hp gain but thats not alot for 385.00 dollars what is best stock or after market
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  #2  
Old 08-17-2010, 11:29 AM
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The general rule of thumb is, if a mod doesn`t produce an increase of 10 RWHP or more, you`ll never know it`s there....as they say, "you do the math"....

(BTW, I don`t think there`s ever been a CAI produced which has given more than 1 or 2 *Real World* HP increase over stock....they DO make more noise, though)
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  #3  
Old 08-17-2010, 11:38 AM
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stigst3r stigst3r is offline
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the Stock intake is designed as a real cool air intake. the only reason u might want to spend the 300$+ on a intake is to show your friends a nice bling pipe with a filter at the end or to increase the noise level coming from your engine.

If you right now would remove the stock intake box and replace it with a after market filter, your intake temperatures might rise because of heat generated by the engine.. Unless you buy one with a fancy heatshield.


i personally would not waste my money on 1-2HP+ performance upgrades
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  #4  
Old 08-17-2010, 11:40 AM
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chiefwej chiefwej is offline
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The stock air intake system is a a CAI, and a safe, quiet and efficient one. No one has ever proved (dyno before and after) ANY HP gain over the stock set-up. Dinan makes a claim for theirs, BUT only if it is coupled with their software changes. Aftermarket CAI's only increase: (A.) the noise of the intake, and (B.) your chances of destroying the engine due to hydro lock.

Do some research and you will find numerous threads on this topic.
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  #5  
Old 08-17-2010, 11:42 AM
speedninja speedninja is offline
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Location: Mishawaka Indiana
 
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do you stigs have a CAI in your car ...and would the exhaust make that sound better if you went without the CAI and stayed with the stock
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  #6  
Old 08-17-2010, 11:44 AM
speedninja speedninja is offline
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so its safe to say that a stock intake is good with a magnaflow exhaust system right i dont need a aftermarket one
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  #7  
Old 08-17-2010, 11:56 AM
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Quote:
Originally Posted by speedninja View Post
do you stigs have a CAI in your car ...and would the exhaust make that sound better if you went without the CAI and stayed with the stock
I dont have a aftermarket CAI on my e39 car. but i have installed a couple in the past, one being a for a n/a MK4 supra, which made the car sound more agressive, later on my friend ditched the intake for a turbo settup.

the other one i have installed was on a 98 subaru 2.5 RS, It makes the car sounds good but my friend has issues with it when it rains since the subaru has openings on the roof sometimes rain will get sucked into the intake. We also had to custom fabricate a very funny ghetto looking heat shield but it seemed to lower the intake temperature a little.



I would recommend for you, if you want to have a little better sound coming out of your engine just get a magnaflow exhaust and its gone bring out the more aggressive sound.

i just bought one recently im waiting for the day i finish my sunroof so i can drive it to the mufler show so they can weld my new exhaust on
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  #8  
Old 08-17-2010, 12:19 PM
speedninja speedninja is offline
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Location: Mishawaka Indiana
 
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which part number im picking the 14816 i think
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  #9  
Old 08-17-2010, 12:20 PM
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stigst3r stigst3r is offline
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i picked the 14815, because i was looking for a more " low profile " look, but the 14816 is also very nice and i have seen some cars that have it that look great
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  #10  
Old 08-17-2010, 12:28 PM
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ECSTuning ECSTuning is offline
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Its really hard to beat the design of more stock BMW air boxs. However with that said you offer both K&N and aFe drop in filters that everyone seems to like well.

Click HERE for more information.


Please let us know if you have any questions! Feel free to shoot me a PM or email.

Best,
Joe
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  #11  
Old 08-17-2010, 12:40 PM
speedninja speedninja is offline
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is it pricey to get them put on or is it something i can do myself
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  #12  
Old 08-17-2010, 12:41 PM
speedninja speedninja is offline
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does those filters work better than the stock... well is it worth changing out the stock ones for the aftermarket ones
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  #13  
Old 08-17-2010, 01:21 PM
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stigst3r stigst3r is offline
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well its good to change your filter from time to time, there really is no noticeable performance gain in replacing the stock one with some high performance one, which ever one you choose, Blue, red, or white.. will do the same job
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  #14  
Old 08-17-2010, 01:29 PM
thedjbc thedjbc is offline
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So, given that a CAI won't do much for the car in any real world measurable situation, what would you all recommend for relatively inexpensive performance mods on a 2002 540i?

thanks
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  #15  
Old 08-17-2010, 01:34 PM
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Quote:
Originally Posted by thedjbc View Post
So, given that a CAI won't do much for the car in any real world measurable situation, what would you all recommend for relatively inexpensive performance mods on a 2002 540i?

thanks


don't waste your cash on pointless sh!t, and put away 100 bux every week for a duration of 12 month. that will finance your VF force induction kit somewhat less expencive from dinan 9-10K kit.

$5,000 can buy you this...


Horsepower: 282 to 415 (Gain of 133 HP)
Torque: 310 to 395 (Gain of 85 ft/lbs)

or for under 2 grand u can get a LS1 Swap or 5.0 Mustang Cobra engine swap, or some thing else made in usa that makes over 400HP+
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Last edited by stigst3r; 08-17-2010 at 01:37 PM.
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  #16  
Old 08-17-2010, 02:55 PM
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chiefwej chiefwej is offline
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Quote:
Originally Posted by thedjbc View Post
So, given that a CAI won't do much for the car in any real world measurable situation, what would you all recommend for relatively inexpensive performance mods on a 2002 540i?

thanks
The cheapest and best performance upgrade from a 540 (in the E39 world) is to sell the car and buy an M5. When Motor Trend tested the original '97 540i it was faster than the original 427 Corvette.


Short of supercharging, BMW pretty much maxed out the 540's performance. There is no cheap power mods it be had.
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  #17  
Old 09-21-2011, 05:36 AM
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bluebee bluebee is offline
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For the record, here is yet another request for CAI (predictably, from someone with 3 posts who almost certainly didn't do a search):
- E39 (1997 - 2003) > Cold Air Intake

Quote:
Originally Posted by Smelyalata831 View Post
Any good CAI kits suggested for an E39 528i?
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  #18  
Old 09-25-2011, 10:37 PM
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bluebee bluebee is offline
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For the record, here is another CAI request, 'under $100', filed today:
- E39 (1997 - 2003) > Cold Air Intake suggestions..

Quote:
Originally Posted by MrBMW525 View Post
Hey guys I was bored the other day and was browsing ebay for possible upgrades on my car. Not willing to spend alot like max 50. I came upon an CAI for 40 bucks and its getting good reviews from the ebayers. What do you guys think?
For the record, here is a screenshot of the user's Ebay link (since links are ephemeral):
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Last edited by bluebee; 09-25-2011 at 10:38 PM.
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  #19  
Old 11-11-2013, 07:00 AM
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bluebee bluebee is offline
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Mein Auto: 02 BMW 525i M54 auto 130K
For the record, this was opened today:
> E39 (1997 - 2003) > Afe intake reviews?
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See also: E39 Bestlinks & How to easily find what you need
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