COLD AIR INTAKE - BMW Forum - BimmerWerkz.com
5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

 
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#1 (permalink) Old 12-01-2003, 07:07 AM
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I did the HD Tecknik cold air intake with a K+N #RU 2520 filter and have a rubbermaid trash can surrounding the whole thing and it's now held in place with various zip ties until the Racing Dynamics heat sheild arrives. I have better acceleration at the 40-50 mph range which is great for passing and you can hear the engine breathing eaiser . No real numbers on 0-60 but it might be a tad quicker at least in my head.

I noticed on the passenger side grille by the fog lamp there is a portion of the grill blocked off that leads to a cooling duct that goes into the engine bay and is covered on the engine side with a plastic cap. Sort of a mirror treatment of the duct that feeds the air filter on the drivers side. I went to Pacific BMW and bought one #747-51-11-8-235-642 that has at least half of the access to that duct open for $18.00. there is still a portion blocked off like on the original and I'm just going to cut that out and open the hole in the engine bay. Should help cool down the engine on hot days or I could route it over to the K+N and poke it into the heat shield for more air over there.

What would be the downside to having more cool air enter the engine? On my old 318i I ran it for 150,000 miles after a head rebuild (the ex didn't notice the temp gauge when the fan switch failed) and hard wired the fan so it would run all the time. So Cal temps don't get much below 60˚ for any length of time so more cold air the better I say. I think I'll fit a screen to the inside of the duct so I don't get a lot of road crud on my engine and once I get the duct open I can direct it to any part of the engine bay using the same parts as the CAI from Home Depot.
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#2 (permalink) Old 12-03-2003, 01:57 PM
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Only downside I can see is the possability of problems with the mass air sensor from the increased airflow but I have not heard many reports of problems with that when CAI kits are added. Looks like you are onto a good idea.

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#3 (permalink) Old 12-03-2003, 03:19 PM
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here is the trashcan install

I'll follow with the Racing Dynamics photo- How do you attach more than one jpeg at
a time?
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#4 (permalink) Old 12-03-2003, 03:39 PM
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Here is the Racing Dynamics shield installed. I should have shot one from the side
by top of drivers side wheel so you could see how it sticks up in the area over the RACING DYNAMICS logo. I think they probably have to shave off about the height of the weatherstrip and then put the strip back on..

when this is done right, it will effectively seal off any air except that which comes in through the intake vent hole in the corner of the engine bay. I asked the guy at RD if it would make sense to have some sort of vent holes out the backside of the enclosure to keep that air moving through the boxed in area but did not get a good answer. Maybe the air building up and being sucked by the Air flow meter is as good as it gets and the fact that it is enclosed compresses the air somewhat but there is nothing except the car moving to help in any compression . I say keep the air moving through by way of an escape vent. I may drill some under where the air tube pokes through the shield (2" maybe) with some round vented covers. (something like a small round plastic vented speaker grill) if I can find a way to seal them back if the temp is higher inside without making the thing look too crappy.
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#5 (permalink) Old 12-03-2003, 04:18 PM
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I may have to consider that, since I have have other Racing Dynamics stuff on mine (Air dam and rear apron)

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#6 (permalink) Old 12-03-2003, 05:17 PM
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according to the carfax this thing started out life in OK and got auctioned
off to the place I bought it from here in Los Angeles. You guys must have mild winters
or the guy who put the first 50000k was an old lady.

I'm looking at shocks in a few as well as tires. I want to take out a bit of the Luxo ride but not get beat up on the crappy pavement they have let most of the roads turn into around here. The fast lanes on the freeways up against the cement walls with the bumps in the pavement is getting scary and needs tightening up a bit.
Had Bilstein-Boge-and KYB(ok for first 5000 mi then junk) on the old 85 318 and have to put my money on the Bilsteins even though I had them rebuilt under warranty every 30,000. Any suggestions? Don't/can't go lower- the shopping center entrances and dips in roads is about at the limit without eating lots of lower lips on the spoiler. Tires- I have always favored Pirelli and will probably get what is ever mid price. I'm not a big tire and wheel guy- They always look like shit if you drive on them and you can't see them when they are spinning unless somebody stole your car and you see them driving away. Besides, anyone who would have a spare that only fits one end (bigger rear tires) is kind of asking for a long wait for a tow
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