LNFTX

Ced has the gmpp in stock but its pricey for a non cleanable filter cant find the size though some say 3 some say 3.25

http://www.crateenginedepot.com/Coba...10449C667.aspx

ECaulk

iTrader: (6)

The fine particles will still pass through, the only thing you might save is having to perform frequent cleanings

umrdyldo

iTrader: (1)

That's the plan.

footballplaya3k

iTrader: (1)

Where'd you get the wrap and how much?

umrdyldo

iTrader: (1)

Amazon.com: K&N RC-4700DY Yellow Air Filter Wrap: Automotive

There is the one I got, you just change the product ending from Y to whatever color you want. B for black, R for Red etc.

I bought from O'Reilly because I had a coupon.

footballplaya3k

iTrader: (1)

Thanks

umrdyldo

iTrader: (1)

NP, I love the color match.

Just a bit of an update. The filter wrap has dropped my LTFT from 3.9 to 2.3.

That is the lowest I have ever seen with the K&N on. 3.9 was my previous low. So I can see that the filter wrap does help with LTFT. I'm sure it's added some restriction back. BPV and intake noise is still pretty high if not a touch quieter.

umrdyldo

iTrader: (1)

For those of you we higher LTFT from K&N filter, the filter wrap has dropped my ltft to near 0. I am very impressed.

importkiller

iTrader: (1)

I am runing the AEM dryflow, I have never been a fan of the K&N oil. What is the consensus on the AEM?

http://autohifidiszkont.hu/bmw-tunin...szuroteszt.pdf

ECaulk

iTrader: (6)

Get a used oil analysis and look at the Si content

importkiller

iTrader: (1)

Will do, what should i look for in Si content.

footballplaya3k

iTrader: (1)

Do you have a link to the filter you have? I've been looking for a dryflow.

12andy

I'm running a K&N drop-in for the meantime (TC, will ensure to monitor closely) due to the fact that getting an AC shipped over costs an arm and a leg - almost $70.00 if I recall correctly(!).

On the flipside, the K&N can be bought locally for almost half that.

importkiller

iTrader: (1)

I bought rissa's old AEM CAI back in the day, then had AEM replace the tube under warranty with an airflow straightener version, So pretty much any new AEM CAI will work and comes with one. But the catch is that you will need a few tunes to get the LTFT and STFT under control. I wish they made a panel filter for the standard intake.

Soofisahab

iTrader: (2)

I jumped on the K&N bandwagon a year after my post; forgot the stats from this report. Took out my K&N that hadn't been cleaned in 30K miles and put in stock filter, feels a tad bit more responsive! Going with stock here on out...thanks for sharing!

droponikz

iTrader: (4)

So im gonna just go out on a limb here and say that Injen filters are not gonna be much better if at all than K&N. From what Iv read Injen produces one of the better intakes on the market.

Staged07SS

iTrader: (25)

Injen uses Amsoil EA nano fiber filters on their intakes now.

They should filter a little better than the K&N's.

Stumpalump

This test has been revised in different forms for a long long time. It's BS. The guy that wrote it is a Charlatan troll. He even states in his opening line that his goal is to discredit. How fair and un biased can you be with an attitude like that but at least the huckster admits it. He did a similar unbiased study on diesel fuel lubricating additives. Again a crock of **** with a recommendation of a new to the market product that he obviously was affiliated with. The filter study is a sham. Don't be fooled.

Staged07SS

iTrader: (25)

Sham or not he did make valid points that are true.

A K&N filters for **** (true), and a large enough oem style filter will provide you with all the flow you need to maintain optimal engine horsepower (true).

Don't believe all the K&N or other highflow air filter hype either.

That is the whole point of this thread.

ECaulk

iTrader: (6)

Have you checked out Donaldson's recommendation of filter sizing for the hp level some of the LSJ's and the LNF's are at? Filters are huge.

I still would like to figure out how to take a SS/SC filter housing and make it work on a SS/TC, given the filtration area of the SS/SC filter is greater (or appears that way haven't got my hands on one yet to calculate it) than the SS/TC filtration area.

blackbird

Can't open the original link at the moment but I've seen quite a few different studies and tests over the years by different individuals, groups and publications with varying quality of test procedures and data. Looking at the filter specs and some of the better, unbiased tests, the usual summary is that the K&N style oiled cotton gauge filters don't filter particulates very well when freshly cleaned and do a better job with respect to filtration once they have more mileage, but they also start to flow less due to increased restriction. A good conventional paper filter in the same size and design normally flows just as well when brand new but degrades much faster although continuing to filter as good as or better than the oiled cotton gauze as it gets dirtier.

Much of the older testing was done on the older style conventional pleated paper filters. It wouldn’t surprise me to see the newer expanded paper fiber/synthetic fiber pleated filters like the OEM on the LNF cars doesn't lose airflow ability as fast as the flat, folded, paper pleated filters (and can likely hold more dirt and has a longer service life). From personal testing at the track on my '08 SS Turbo, both stock and with the GMPP S1 upgrade it was extremely consistent for traps speeds and the engine management was able to produce the same engine torque with almost identical boost required with a fresh K&N or newer OEM filter. I'd swap back and forth every few passes and wouldn't see any changes.

To me that showed the stock air box and filter size likely isn't a restriction on even a mildly modified car and definitely showed no advantage to the aftermarket drop-in filter. As someone who worries about what's going through the turbo, into the engine and keeping debris out I'd much rather run a conventional paper/fiber filter than a freshly serviced and oiled cotton gauze filter. For someone heavily modified I'd probably want to do much more in-depth data logging, maybe wire in some standalone pressure sensors before and after the filter in the intake tract to log pressure drop, etc., but I wouldn't want to just slap on a different aftermarket intake system and think it would automatically work "better" because it has a certain type or size filter, especially when the plumbing is different and you have a MAF sensor located in the inlet tract.

Powell Race Parts

iTrader: (3)

^^^ good post. plus the popular filter on a stick esp. on the TC really elevates the hell out of inlet air temp and air density . its all fail, as much as folks want to descredit the testing its been done over and over and its 100% OEM is better. period.

,meh.

ps re your garage, my first vented RL hood had ASC Mclaren hood vents, I purchased a bunch of the NOS stock they even had water collectors that I discarded...

Staged07SS

iTrader: (25)

The stock LSJ filter is large enough. It is about an inch taller than the K&N E-0777 drop in, and has deeper pleats, and more filter media.

I just ran the K&N in my airbox for a month to see if there was a difference. My car is stronger in all rpm ranges with the factory ACDelco filter.

It still flows the exact same about 39 lbs/min, and the restriction is on par with a clean K&N drop in when running a blower inlet pressure test.

Another thing I noticed that was crappy about the K&N drop in.... there was tiny grit at the top of the filter where it should be sealing to prevent un metered air. The stock ACDelco has a much nicer sealing surface and provides an air tight seal.

ECaulk

iTrader: (6)

I had the same issue with my K&N filter on the K&N intake, also inside the pipe was dirty. I switched to a Amsoil EA filter and its stayed clean.

I've got a stock LNF intake on the way to do some comparisons, now to find a stock LSJ intake or at least filter housing

Staged07SS

iTrader: (25)

I'm sure if you post a wanted add, someone here will have one for ya