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K&N Air Filter?

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Oct 19, 2007 | 07:45 PM

#31

weesped

Lexus Champion

iTrader: (8)

Joined: Jul 2007

Posts: 2,026

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From: Honolulu, HI

what about the blitz drop in filter any one?

Oct 19, 2007 | 08:11 PM

#32

Lextasy89

Lexus Test Driver

Joined: Sep 2007

Posts: 1,097

Likes: 0

From: Dallas

no drop it will cause any noticeable power

Oct 20, 2007 | 03:20 AM

#33

Joeb427

Lexus Fanatic

iTrader: (1)

Joined: Aug 2007

Posts: 11,670

Likes: 20

From: SC

The ONLY performance benefit a K&N drop in has is at 5000 RPM and above.

Oct 20, 2007 | 07:26 AM

#34

is4fsr

Lead Lap

Joined: Feb 2007

Posts: 583

Likes: 1

From: CA

1. No sound difference
2. Yes. Better throttle response and improved gas mileage ( approx 1 mpg - IS250)
3. ajusa.com sells them cheap.

Oct 20, 2007 | 12:29 PM

#35

al503

Lexus Champion

Joined: Jun 2003

Posts: 1,680

Likes: 8

From: Oregon

Quote:

Originally Posted by dspIS250

al503, the less restrictive something is the louder it is. it was this way on my turbocharged eclipse and every race car in the world. when you put mufflers on a drag car it smothers the high performance engine and less sound can be heard. that's why open headers are louder than mufflers.

I haven't checked this thread for a while so sorry for the delay in responding.

Your conclusion is based on a totally different situation. For starters, you're basing your argument on the exhaust side, not the intake. In addition, you're basing your argument on the existence or absence of major sound absorbing/deadening components. I thought were were discussing the difference in sound with the mere substitution of an aftermarket filter.

With that in mind, an intake with a less restrictive filter will be quieter than the same intake with a more restrictive filter.

Oct 20, 2007 | 12:36 PM

#36

shoguns

Driver School Candidate

Joined: Oct 2007

Posts: 30

Likes: 0

From: Texas

i think the "aggressive" sound some people were talkin about comes from puting a K&N cold air intake in. not just a drop in filter...its been proven than a CAI boosts power. but to get the best out of it you should do an aftermarket header and exhaust. then you would FEEL the power increase. So my vote would be YES for a K&N CAI but NO for just a drop in filter.

heres a link for the CAI...
http://store.knfilters.com/search/pr...Prod=69-8701TP

Last edited by shoguns; Oct 20, 2007 at 12:48 PM.

Oct 20, 2007 | 01:41 PM

#37

iSuxeL

Lexus Fanatic

iTrader: (21)

Joined: Jan 2007

Posts: 9,302

Likes: 1

From: FL

Anyone know the size of the OEM intake inlet?

Oct 24, 2007 | 03:57 PM

#38

J'sSoarer

Driver School Candidate

Joined: Oct 2007

Posts: 18

Likes: 0

From: IL

i have an sc300 and i put a k&n cone filter instead of the drop in. the car seems a little more responsive and under normal driving i get 20 miles per gallon instead of 18 when it was stock

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Oct 29, 2007 | 07:01 PM

#39

Chirodan

Rookie

Joined: Jun 2007

Posts: 58

Likes: 0

From: TX

I don't really care about power, but if it does give even 1 mpg increase, it will be worth it over time.... even a little bit better gas mileage is why I would buy it... That is the proof I am lookin' for.

Apr 9, 2008 | 06:49 AM

#40

lobuxracer

Tech Resource

iTrader: (2)

Joined: Jul 2006

Posts: 23,083

Likes: 4,752

From: Georgia

Quote:

Originally Posted by J'sSoarer

i have an sc300 and i put a k&n cone filter instead of the drop in. the car seems a little more responsive and under normal driving i get 20 miles per gallon instead of 18 when it was stock

This could very easily be attributed to ingesting warmer air. At anything less than 50% throttle warm air gets better efficiency. Only at WOT does the cold air thing make a big difference.