06-15-2015, 11:29 AM
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#21
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Registered User
Join Date: Dec 2014
Location: Pacific Grove, CA
Posts: 494
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Quote:
Originally Posted by Hummer-addict
Thanks For All The Advice...sorry If It Caused Trouble...I Bought A Cold Air Kit Off Ebay For About $300.00...Debating On Installing Or Selling..lol Still Undecided...
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Here's some more information for you that hopefully will help inform you and not start a dog fight here.
Cold Air Intake Systems - Facts and Myths About Aftermarket Air Intake Systems
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06-15-2015, 03:05 PM
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#22
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Registered User
Join Date: May 2015
Location: Connecticut
Posts: 70
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Quote:
Originally Posted by Luv2Box
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Great read thank you. still not sure if I want to install it or not...:dance:
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06-16-2015, 06:21 AM
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#23
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Registered User
Join Date: Feb 2014
Location: Virginia
Posts: 157
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I don't know why people are so vehemently opposed to a mod that provides modest HP but serious sound improvement. I could not be happier with the change in sound after installing the cat delete pipes and top speed muffler and that did not add very much HP. I have considered installing an after market intake just for the sound.
I also note most of the people who are against it are people who have not actually installed one. I can't recall seeing too many "why did I install this it was a big mistake" aftermarket intake posts.
__________________
01 Base Arctic Silver, Top Speed Muffler and Cat Delete pipes, Ben006 Short shifter
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06-16-2015, 06:54 AM
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#24
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Registered User
Join Date: Apr 2010
Location: Canada
Posts: 3,121
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Quote:
Originally Posted by Carlisabadman986
I also note most of the people who are against it are people who have not actually installed one. I can't recall seeing too many "why did I install this it was a big mistake" aftermarket intake posts.
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I installed a bmc direct air injection cai and it was a big mistake - killed the maf. it is now out of my car and I have a 987 airbox (oem, sealed to the outside, cone paper filter, sounds fine) in it. much better.
I bought a car with a bmc carbon dynamic airbox in it and, guess what, killed the maf. it is now out of the car.
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06-16-2015, 06:54 AM
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#25
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Registered User
Join Date: Dec 2006
Location: shoreham, ny
Posts: 1,619
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Keep the stock airbox or put in a 987 box.
__________________
996 3.4 engine with 2.7 986 5speed transmission
Ebay Headers, Fabspeed high flow cats, JIC Cross, IPD Plenum, H&R Coilovers, B&M Short Shifter, AEM Uego Gauge Type Analog, Apexi S-AFC Select, 987 air box, Litronics, 2000 Tails and side markers, painted center console, 18" 987 S-Wheels, GT3 Front bumper with splitter.
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06-16-2015, 02:20 PM
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#26
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Registered User
Join Date: Jan 2014
Location: Albuquerque, NM, USA
Posts: 730
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Using reputable test equipment and methods, a test of a BMW k-bike was performed
The test compared
Stock filter
Stock filter half blocked off
No filter in airbox
K&N filter installed
NO difference in airflow was measured among the 4 configurations.
Given this along with the experience of many that K&N has trouble providing rectangular filters in correct dimensions and that the filters themselves are known to deteriorate/collapse, they are simply items for fools. Indeed enjoy the noise
__________________
Kent Christensen
Albuquerque
2001 Boxster
2007 GL320 CDI, 2010 CL550
2 BMW motorcycles
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06-16-2015, 02:48 PM
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#27
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Need For Speed
Join Date: Feb 2013
Location: Funville
Posts: 2,112
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If you go to K&N's FAQ, they state 1 to 4 hp might be possible. They also state that nobody has any proof that their air filter will kill a MAF sensor and that their air filters will not kill a MAF sensor stating " it is both impossible and ridiculous".
Lots of info there.
K&N Frequently Asked Questions (FAQ)
I've been using K&N air filters since the late 80's and never had an issue with using them.
I agree with JAAY, either leave the stock air box or use a 987 air box.
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06-16-2015, 03:02 PM
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#28
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Registered User
Join Date: Apr 2010
Location: Canada
Posts: 3,121
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hah! it happens so infrequently they had to devote an entire page of their website to it. what did shakespeare say? "methinks thou dost protest too much." regardless, I have no empirical evidence, just cause and effect - no maf problems for life of car, add oiled filter element, maf fails. twice. and this is the supposedly more robust 125.01 maf in both cases. perhaps just poor luck and bad timing, but I won't take the chance again.
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06-16-2015, 03:16 PM
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#29
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Need For Speed
Join Date: Feb 2013
Location: Funville
Posts: 2,112
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lol TRK. I don't buy into them saying it can not happen. I took a leaf blower to mine before I installed it to push out any excess oil. It didn't look to be over oiled, but I didn't want to chance it.
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06-16-2015, 05:49 PM
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#30
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Registered User
Join Date: May 2015
Location: Connecticut
Posts: 70
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I decided to keep my stock box...I'll put the cold air on eBay and put the $ towards another mod...thanks for the feedback!
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06-18-2015, 02:32 PM
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#31
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Registered User
Join Date: Apr 2012
Location: Missouri
Posts: 134
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Scared
You guys are scaring the be-Jesus out of me. The first thing I did 3 years ago was put a K&N in the Boxster. I'll be replacing it with a stock filter tomorrow before I head to the Parade.
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06-18-2015, 04:15 PM
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#32
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Need For Speed
Join Date: Feb 2013
Location: Funville
Posts: 2,112
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Quote:
Originally Posted by davedeck
You guys are scaring the be-Jesus out of me. The first thing I did 3 years ago was put a K&N in the Boxster. I'll be replacing it with a stock filter tomorrow before I head to the Parade.
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3 years and you think it's going to hurt your car now?
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06-18-2015, 05:41 PM
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#33
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Registered User
Join Date: Apr 2012
Location: Missouri
Posts: 134
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Not really. If it has done any damage it's already happened. But I am getting tired of cleaning and oiling it. If it made any difference in the performance I guess I'll find out. I have a K&N on the Harley as part of the stage 3 ensemble. I would think HD would have tested this out.
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06-19-2015, 08:02 AM
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#34
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Registered User
Join Date: Aug 2005
Location: Sanford NC
Posts: 2,537
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Just to add some references to this thread for future readers.
When I googled "oiled air filters test" these were the first three to be displayed. None of these were the car mag and Consumer Reports mag tests I referenced in another posting. The conclusions in each were consistent with each other and what I remembered.
I did not go beyond the first three because the references were to data from makers of oiled filters who are presumed to have a financial interest in the way they present things.
Air Filtration Test Bob The Oil Guy
http://www.nicoclub.com/archives/kn-vs-oem-filter.html Nissan Club Member
Air Filter Comparison Study - GM Truck Central
Almost everything we choose is a trade off. It is OK to have different priorities.
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06-19-2015, 08:51 AM
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#35
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Registered User
Join Date: Dec 2014
Location: Pacific Grove, CA
Posts: 494
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One from 2007 and two from 2012 performed on GM trucks and this is the conclusion:
"we can't say that all oiled filters are worse than dry filters, but from the data we saw, it is worth noting their placement."
Each of us takes our own risks/rewards for the mods we choose to spend our money on and the debate over CAI/oiled filters will continue just as the debate over which oil to use or which spark plugs are best. I know this, after 3+ years of oiled CAI use, my Boxster, with 117K miles, runs just as good, and perhaps better, than it did with a paper filter and restrictive OEM air box. Max torque and hp kick in around 1K rpm sooner than with the OEM filter. The oil that is drained at 5K miles, and the filter, are almost as clear as the new oil put in. If there is any motor wear after three years it doesn't seem evident. I've never recommended anyone do the mods I've done, it is their choice, I only give my experience when asked.
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07-15-2015, 04:51 PM
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#36
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Registered User
Join Date: Jun 2014
Posts: 61
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07-17-2015, 12:59 PM
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#37
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Registered User
Join Date: Aug 2013
Location: Bay Area
Posts: 700
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Leave the stock filter, remove the snorkel and remove the air-vibration expansion/damper (replace with a rubber cap and worm clamp). Huge noise, cost $3.
You lose the 'tuned' aspect of the stock 986 intake track by removing the expansion chamber, but my butt dyno doesn't notice a difference while my ears certainly do!
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07-17-2015, 01:38 PM
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#38
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Registered User
Join Date: Jun 2014
Posts: 61
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I don't know numbers, but at some point more air must better than "tuned" air, no? I mean, can you even give an engine too much air?
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07-17-2015, 01:58 PM
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#39
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On the slippery slope
Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,794
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if you want more noise, just de-snorkel it
__________________
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
2004 996 Targa Tip
Instructor - San Diego region
2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
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07-17-2015, 07:01 PM
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#40
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Registered User
Join Date: Aug 2013
Location: Bay Area
Posts: 700
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Quote:
Originally Posted by Pnut
I don't know numbers, but at some point more air must better than "tuned" air, no? I mean, can you even give an engine too much air?
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By removing the expansion chamber, the engine still physically has access to the same amount of air(didn't change the size of the intake or intake tube diameter), but removing the chamber actually makes it harder for the air to get into the engine because of destructive interference with the resonant frequencies that are no longer dampened by the chamber. I'm not sure how much of the chamber was for performance versus for US intake noise regulation however...
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