1. not installing the cover probably doesn't offer that much of a performance gain... but it is louder.jmc007 said:It will probably fit, but here are the suggestions.
1: To achieve higher performance gain, do not reinstall the lower cover of the airbox.
2: Since the filter will not be holded anymore by the cover, you must hold the filter with a collar. To properly tighten the collar's screw, you will probably have to make a litlle hole in your airbox to get your screwdriver aligned with.
3: Be sure that there is not too much oil on your new filter, since the MAF will get oiled and your PCM will throw you a code.
4: Reset the PCM (by disconnecting the negative pole of the battery (which is located in the trunk) within a couple of minutes) then let the car idle for about 5 minutes. This must be done immediatly after the new filter being installed.
Have a nice day !
iso said:1. not installing the cover probably doesn't offer that much of a performance gain... but it is louder.
2. since the filter will not be held in place by the cap, you'll have to use the provided clamp with your filter, and you will have to drill a hole in the side of the airbox to tighten said clamp.
3. i haven't heard of "filter oil" causing a problem with the MAF, as far as i know that is inaccurate. the oil on the filter simply helps clean incoming air of small debris. the k&n filter i installed on my ss has given me no problems whatsoever.
4. it is not necessary to unconnect the batter, doing so doesn't do much. the pcm should automatically adjust for the increased airflow after driving with it for a while. a lot of people will tell you that you have to reset the pcm for that to happen, but it should just do it on its own. and you DEFINATELY wouldn't have to do that right after putting in the new filter. it wouldn't matter when you did it, if you decide to even bother.
dazednconfused75 said:Removal of the lower part of the airbox apparently makes the blower scream. I've heard it but didn't do it myself.
If the filter is overoiled from the factory (which many are) it will make the MAF crazy and has on a number of Red Lines.
I always disconnect the neg. battery terminal when changing the intake or properties of an engine. If you don't, the PCM will adjust, but it will take longer. It can't possibly hurt anything.
the only modification required is drilling a small hole in the airbox to get a screwdriver in to tighten the clamp on the neck of the filter. no big deal. some people are cutting the airbox off the tube completely.astrocrep said:But the thing is... is if its a drop-in replacement, why would it require modification to the stock air box.
If our current filter in a cylinder and not a cone and the redline filter is identical in shape and size to our stock filter...
I don't see why would would have to chop anything up.
iso said:yes, as i said, removing the cap makes the car louder, however it wouldn't off much of a performance gain. i'd say <1 hp if any at all. i took the cap off and started the car, revved it and it was noticably louder.
and what do you mean the box has to "fill up"? there's ALWAYS air in the box, so i don't see how the box would have to fill up. the engine isn't gonna suck the air in so fast that there's a vacuum in the air box.. especially not anywhere near a second. the engine is working a little harder to pull air through the snorkel of the airbox, but simply removing the cap isn't going to give a productive power gain.selfinfliction said:did you try driving it without the bottom on? it makes a huge difference. i did it both ways and then left the bottom off after the drive. the way that airbox is made with that semi-snorkel, when you hit the gas it sucks the air right out of that box and it takes it a split second to fill up from that little ass hole the air comes through.
same principle with a cold air box. when i had a cab on my cougar, and you floored it, you could hear the air dump out and then then everything would get going. when i took it off and just ran the gmk cai there was absolutely no hesitation.
with the bottom of the box off, you don't have to worry about starving the engine for that split second because it's not all enclosed like when the airbox is breathing through the snorkel.
iso said:i have the cap off cuz the filter i installed was longer than the stocky... i'm just saying that removing the cap, and not replacing the restricive paper filter is a waste of time. your gonna see what a 1-2 hp gain by removing the cap... whoopdie effing doo.
unlesss you've hooked your car up to an accurate machine to measure throttle response, then i'll believe you. i didn't notice a difference in throttle response, notice how i said "notice". that doesn't mean there isn't a gain, but if it's <.5 sec (which it probably is) your not gonna feel it. if you want to get an improvement then swap the stock air filter along with removing the cap. JUST removing the cap doesn't pose a great performance gain.c7015 said:but the gain in throttle response is the main benefit of leaving it off
iso said:unlesss you've hooked your car up to an accurate machine to measure throttle response, then i'll believe you. i didn't notice a difference in throttle response, notice how i said "notice". that doesn't mean there isn't a gain, but if it's <.5 sec (which it probably is) your not gonna feel it. if you want to get an improvement then swap the stock air filter along with removing the cap. JUST removing the cap doesn't pose a great performance gain.