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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 06-04-2019, 04:51 PM
ScottZ ScottZ is offline
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Mein Auto: 2003 540i M-Sport 6-speed
Cold Air Induction recommendations

Looking for a cold air induction set up for my '03 540i M-Sport. I stumbled onto a random post on the high quality of Standard Motoring's CAI and sent an email, but no response. If they are no longer in business does anyone have other recommendations? Thank you! -Scott
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  #2  
Old 06-04-2019, 05:35 PM
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mattmar1 mattmar1 is offline
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the factory setup is a good CAI system.
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  #3  
Old 06-04-2019, 07:13 PM
Santaclaus4 Santaclaus4 is online now
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Quote:
Originally Posted by ScottZ View Post
Looking for a cold air induction set up for my '03 540i M-Sport. Does anyone have other recommendations? Thank you! -Scott
Just don't...
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If you put cheap parts on your car, you'll soon have a cheap parts car.
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  #4  
Old 06-04-2019, 10:03 PM
edjack edjack is offline
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Don't screw with the OEM setup; you will gain nothing.
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Old 06-10-2019, 07:40 PM
ninetyseven ninetyseven is offline
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cosmoracing makes a really good one it's a Dinan replica, goes under the bumper to pull real cold air. Don't believe that the factory one is sufficient, it's not . An aftermarket one WILL give you more hp, expect 20 hp if u match it with a Dinan Stage 2 software flash and about 7-10 hp without the tune!
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Old 06-10-2019, 08:01 PM
CSMBlack-540i CSMBlack-540i is offline
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Originally Posted by ninetyseven View Post
goes under the bumper to pull real cold air....and about 7-10 hp without the tune
So does the factory one if you've ever followed the tubing from under the bumper. 7-10 HP? I suppose a Comsoracing sticker adds another 1-5HP too?!
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Old 06-10-2019, 10:07 PM
ninetyseven ninetyseven is offline
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Yes 7-10 hp, l got a nice gain from my cold air intake system. It's a definite power improvement. This has also been dyno proven many times on the m62 motors. don't believe that the factory is always right.
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Old 06-10-2019, 10:11 PM
ninetyseven ninetyseven is offline
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I am a bmw technician. There are tons of small things that can add up to big power on the m62 , like bigger injectors. The factory 19 lb are a bit small for a motor with over 310 hp . If you swap to 21 lb injectors there is an improvement.

Last edited by ninetyseven; 06-10-2019 at 10:14 PM.
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  #9  
Old 06-11-2019, 12:54 AM
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Burning2nd Burning2nd is offline
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none of the tiny little upgrades that you can do will make up for a upgraded brake kit and polyurethane bushings suspension...

Night and day

yes there are a bunch of little things you can do .. to squeeze the little bit more Hp you can get out of it..

BUt you can use it because you suspension and stopping power limit you max speed
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Old 06-11-2019, 05:02 AM
528iAut 528iAut is offline
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You will get a 10hp improvement if you remove the spare tire and tool kit. Do you notice, I dont!
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Old 06-11-2019, 08:40 AM
ninetyseven ninetyseven is offline
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Look how small the factory tubing is compared to the Dinan and look at all the bends and there are even flat spots in the factory tubing it's not ideal there is always room for improvement
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Old 06-11-2019, 09:56 AM
edjack edjack is offline
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Note that a low-slung CAI will promote water ingestion during heavy rain, which can lead to hydrolock. Not a good thing.
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  #13  
Old 06-11-2019, 10:04 AM
CSMBlack-540i CSMBlack-540i is offline
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Originally Posted by ninetyseven View Post
Look how small the factory tubing is compared to the Dinan and look at all the bends and there are even flat spots in the factory tubing it's not ideal there is always room for improvement
Speaking as someone who actually had a Dinan CAI installed, aside from growl and butt dyno telling me I was .1 (1/10th) of a second quicker in my 0-60, there was NO negligible difference except having to clean my MAF from more often due to occasional CEL.

Luckily some other Dinan Fanboy paid me more than what it cost me even after having used it for 2 yrs simply b/c they thought it would be an improvement.

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Originally Posted by edjack View Post
Note that a low-slung CAI will promote water ingestion during heavy rain, which can lead to hydrolock. Not a good thing.
Exactly why I sold mine. A friend had a 540 with Dinan CAI and it hydrolocked and cost $14k to replace the engine. This when the car was just a few years old.

One could argue to get the Dinan CAI sock but then, you're back to restricting air flow using it.

Last edited by CSMBlack-540i; 06-11-2019 at 11:31 AM.
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  #14  
Old 06-11-2019, 10:12 AM
ninetyseven ninetyseven is offline
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I see what you're saying yet mine has never ingested water look at this link and scroll down to the CAI http://www.dinan540.com/MODIFICATION...fications.html

Last edited by ninetyseven; 06-11-2019 at 10:13 AM.
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  #15  
Old 06-11-2019, 10:40 AM
CSMBlack-540i CSMBlack-540i is offline
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I see what you're saying yet mine has never ingested water
...until the day it does during a sudden downpour all for the bling factor and a 1/10 increase in the butt dyno. No need to look at any link. Like I said, I had one for 2yrs and sold it used for the more than the price I paid for it.

Last edited by CSMBlack-540i; 06-11-2019 at 11:30 AM.
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  #16  
Old 06-11-2019, 11:19 AM
ninetyseven ninetyseven is offline
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I don't drive mine in the rain anyway, these cars have waaay too much torque for wet conditions , it's dangerous
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  #17  
Old 06-11-2019, 11:27 AM
CSMBlack-540i CSMBlack-540i is offline
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I don't drive mine in the rain anyway, these cars have waaay too much torque for wet conditions , it's dangerous
So are you a weather-man too that knows when a sudden downpour will occur?
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  #18  
Old 06-14-2019, 11:04 AM
rac421 rac421 is offline
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Quote:
Originally Posted by CSMBlack-540i View Post
...until the day it does during a sudden downpour all for the bling factor and a 1/10 increase in the butt dyno. No need to look at any link. Like I said, I had one for 2yrs and sold it used for the more than the price I paid for it.
Exactly! My 540i with the M sport package came with a Dinan CAI and stage one tuning. It looked cool. But, put the air intake only inches from what could easily be water (even a dip in the road in a rain storm might do it. Not To Mention, in order to check or replace the filter required pulling the front wheel and taking off the wheel-well cover to get at it. For a maint. nut that was off-putting. Soooo, I cut down the $340. Dinan tube as pictured in the attachments zeroed it over where the cold air actually comes into the bay and am much happier (not to mention easier in my mind when the storm clouds gather). I might also note that I have about $240. worth of that tube left over in case the first one wears out (grin). If anything, the performance is better (though minuscule at best—possibly even psychological, in fact). All in all, I wish the car had been left stock to begin with.
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  #19  
Old 06-16-2019, 05:58 AM
4thBMW 4thBMW is offline
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I'm frequently ammused by some who want to take a well engineered system

and mess with it. I recall modifying my old 735i with a chip and "free flow" air filter system. Was so unimpressed (seat of the pants vs on paper hype), that I sent it all back. That said (and resembling Burning 2nd's comment), on that 1988 735i I installed an M-tecnic (BMW) front sway bar upgrade along with the BMW M-technic front lowering springs combined with the stock shocks and springs elsewhere to make for very noticeable handling stability with a great ride. I may have used some of those purple bushings on the bars ft. and rear...think so. Tried them on my E39 sway bars, did't like them....just me.

Last edited by 4thBMW; 06-16-2019 at 06:15 AM. Reason: add
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  #20  
Old 06-16-2019, 01:47 PM
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breaks,
suspension
engine (engine entails exhaust and intake)
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Old 06-16-2019, 02:17 PM
4thBMW 4thBMW is offline
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I get worried when the intake and exhast dwarf the engine block.

>> https://revsinstitute.org/the-collection/fiat-abarth/
I saw the Abarth from the Collier collection @ the N.Palm beach racetrack some yrs ago out for some exercise....the car wouldn't start. I did note that the carbs, biggest Weber ever made, were that same as on that collection's factory Grand Sport Corvette race engine. I had been told that Weber made very few sets of the 50something mm carbs for the GS and the Lola T70 engines. So, on that Fiat is, well, worthy of a crew and tow truck in pursuit. Browse this car collection and if in S.Fla, try and go see it.
IF you do get to see the car collection...two engines: 1) The 1939 Merc W154 and the 2) Lancia F 50 F1, which I did see run and video's the pre-start up of runing the fluids through a heat pump on a strict waarm up proceedure before ignition. lol. Yes, those are fuel lines next to the rear tires coming out of the rear of the "elbow rests"

Last edited by 4thBMW; 06-16-2019 at 02:43 PM.
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