ZUKIWORLD Online | Suzuki 4x4 Editorial and Forum
ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: dentedzuk on November 04, 2007, 12:40:29 PM
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Anyone got some advice on whats better for performance in my 01 2.0L vitara? Option 1. replace oem paper air filter in with k&n air filter in the stock box.. seems easy enough also stock box pulls air from outside the engine comp thru the fender well feeding the truck cold air but still restricted from the factory box silencers and whatnot.... Option 2. pull box, strap on k&n high flow cone in its place... seems like it will ge alot more air but also the air temp will be alot hotter from the engine, unless maybe i fab some kinda heat shield... just wondering what would be better.. and if theres a better option let me know.. im new to this game!
thanks
james
;D
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you could get a functional hood scoop and place it over the intake and fab up a heat sheild that seals the inside air and lets it breathe from the hood scoop. aka ram air induction
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I run the K&N and a Snorkel on lil Suzy. I figure the scoop on the snorkel gives a little ram air effect at highway speeds and I can ford deep water without worry. The K&N is a good choice, just don't clean it to often. It actually filters better once it has some dirt on it. I was listening to a rep from K&N on a local hot rod radio show a few weeks ago and he was saying that cleaning the filter too often was the biggest mistake users make.
You should be fine with the standard filter routing. Ram induction is somewhat over rated. It will not actually pressurize the air at the injector unless you are going insanely fast. Even then the compression is negligible. The best you can expect is to make the air available to the injection when it wants it, so engine vacuum doesn't have to suck it through the filter. Testing for air restriction is quite easy. with the engine running loosen the rubber hose between the injector and the filter. Remove the hose and if the rpms increase there is restriction. using the idle screw on the injector Rev the engine to a steady 2,500 to 3,000 and repeat the test. This will give you a good idea of how much restriction there is in the system. If you find restriction you can do the same test at the filter. fix the filter to the lid with double sided tape or rolled duct tape, then install and remove the lid and listen for rpm changes.
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i dont have a 2 liter( its a 1.6) but i noticed an acceleration boost with a k&n replacement air filter. but it really made a difference when i put a thrush turbo muffler on. i would also like an intake, i dont know what the vitara looks like but there is more than just the 02 sensor in my car and wouldnt know what to hook up all the other stuff too. see if the have a bolt on aftermarket intake. that is the easiest thing to do to get the most air in your car.
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hey sidekicksrock thanks for the advice about testing it.. thats were i'll start with the stock box.. then add the k&n replacement filter and work my way out.. maybe rework (make bigger) the ducting from the wheelwell tothe filter box or add more... as for the hood scope..it may be a little to much for my daily driver probly suck to much water.. but i was kinda thinking of fabbing some breather vents in the right fender to add some extra air..i know it sounds stupid but anything would look better than the huge dent thats there right now.. half the fender is crushed in!
I havent seen to many aftermarket intakes for the 01 vitara... but i also havent looked to hard
Thanks
James :)
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Basically what you want is for air to be able to flow through the intake system as fast as the engine needs it. Air which is a fluid, will attempt to rush in and equalize the vacuum created in the system by the engine. The only thing you want to provide is a free flowing path for the air to travel through. What you don't want is a situation where the air can not flow as fast as the engine needs and the engine must attempt to suck the air through the system. I hope this makes sense.
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makes sense... ill just replace the oem paper filter with a k&n filter!
Thanks
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http://www.bobistheoilguy.com/airfilter/airtest3.htm
i run a larger paper filter. the k&n lets more crap through
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[url]http://www.bobistheoilguy.com/airfilter/airtest3.htm[/url]
i run a larger paper filter. the k&n lets more crap through
I will stay with my K&N. In the tests it came in slightly dirtier than a stock air filter. This test was done on a new filter, K&N is very clear that their filters work better after they are used for awhile and start to accumulate dirt on the fibers. The filtered side of lil Suzy's air filter is clean to the touch with no dirt or dust evident. If the engine was sucking in sand that would be one thing, but the level of dust particles we are talking about here can not have much effect on an engine.
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The K&Ns filter better when they're dirty but the flow rate goes down. If you hold a dry filter up to the light you can see the size of the holes in the K&N. I did a number of dyno tests on a bike a good few years ago, the K&N was the best aftermarket filter at the time. I used the biggest bolt on filter I could fit on and got no power difference between that and an open intake. On my road bike I got 175K from the first engine with a stock filter and 75K from the second using a K&N. The K&N was always run oiled. I only cleaned it when it took more than 10secs to do a 100-130mph top gear roll on ;D.
I can't believe that a stationary test will really tell you much, the air flow requirement is so low that if the filter is restrictive at that level then that engine isn't going to move its own weight. Try the test on a straight bit of road and use a stopwatch.
'Ram induction' can give you a bit of a boost by supplying cooler air but you aren't going to see a real pressure increase. take a look at some of the systems on bikes - very complex and worth about 5-10bhp at 170mph. I messed with a system on a race bike and couldn't get measure discernable difference under 130mph.
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Don't forget the new Synthetic filters are coming out now. Better airflow and they filter better then paper. Of course, probably not out for the Trackers yet...
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personally, I just run paper and replace often. They are cheap, and flow well enough when clean.
At $40 for a K&N and <$5 for a paper filter, I can change the paper filter twice a year for 4 years before I've "thrown away" that money (and I didn't have to clean/recharge the K&N regularly either)..
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Check on eBay for the K&N. I purchased one for my '92 Tracker for a mere $28 including shipping. It was new and in its original box.
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also the k&n air filters come pre oiled and dont have to touch them for at least 50 thousand miles
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also the k&n air filters come pre oiled and dont have to touch them for at least 50 thousand miles
If you believe their advertising. I had to clean mine at pretty much the original service interval, road use only.
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Im going to go with the k&n drop-in replacement filter. Hopefully it in conjuction with a cheapo thrush turbo muffler i have just installed should let my truck breath a little better than the stock setup!
thanks for the help
James