I got this off the jeepforums.com

remove airbox from vehicle and remove airfilter from box. On the bottom part of the box, with a 3/8" drill bit, drill 8-12 holes on the bottom of your air box so the additional air intake is being filtered by the airfilter. Re-install in the vehicle and vuala! i need some feed back if any is available.

p.s. yeah i cought the error in opinions

Ask yourself this. Cadillac made a world class performance engine. Do you think they would rob performance by something as simple as not making the intake opening big enough? I doubt it.

Don't be too rough on him, he was just asking a question. And that world class bit, I think depends on which Cadillac we're talking about. I noticed my intake before the air box, though the end placement behind the light isn't a bad idea, is kind of slapped in the face by the fact the damn thing passes within a few inches of the exhaust manifold... Not too world class there.

However, one thing is true, drilling holes in the air box is not a bright idea. That will let air in from the engine compartment. This might decrease the force needed to draw air in a little, but the speed..and probably even a bit of density/pressure would also, and it would unquestionably bring in warmer air, and do more harm than good from what I can deduce...unless I'm missing something.

I wasn't being rough on him. Hope I did not come across that way. By "world class" I was talking about the Northstar. I thought Gixxer was as well.

at the same time its still a cadillac which means they have certain standards they wanna maintain like, quietness of the engine, which is best achieved by baffles in the intake, when you baffle the intake the flow is restricted so you sacrifice power, so even if his method wasnt the best one to use, there is still performance to be gained from modifying a "world class performance engine"

just look at all the mods available for the LT1 that 94-96 fleetwoods

I got this off the jeepforums.com

remove airbox from vehicle and remove airfilter from box. On the bottom part of the box, with a 3/8" drill bit, drill 8-12 holes on the bottom of your air box so the additional air intake is being filtered by the airfilter. Re-install in the vehicle and vuala! i need some feed back if any is available.

p.s. yeah i cought the error in opinions

this mod has been done on pre-LT1 b and d bodies and is called swiss cheesing the intake, and from what ive read on the subjact, it helps but not as much as a complete redesign would, check out this thread, its for b-bodies but same concept and i spent less than 40 bucks total

http://impalassforum.com/noncgi/ultimatebb.php?ubb=get_topic;f=9;t=001945

btw mine is #6 on the list

Ask yourself this. Cadillac made a world class performance engine. Do you think they would rob performance by something as simple as not making the intake opening big enough? I doubt it.

You're kidding, right? You honestly think that it's unreasonable to believe that an aftermarket filter (let alone a full CAI system) could offer a performance increase?

LOL, come now Katshot, we already beat this to death :horse:. No one said anything about the filter, and cheesing the intake isn't exactly a whole new CAI system....most especially not on mine, since the manifold's practically right under the airbox :cookoo:.

I agree with you on one thing, we shouldn't take everything at face value. I personally have never owned a N*, so I know jack about that thing, but Cadillac has made mistakes...*cough85cough*, and however world-reknown their engine is, questioning never hurts. You either learn why you were wrong, or find something neat out. Win, win.

If they stopped shrinking these things, there would be room for a better CAI lol. Sorry, I just love the big banana boats....but it's true. Hard to get cold air when they leave enough room under there where I start wanting that device in "Honey, I Shrunk The Kids" to do work. That and we'd *gasp* be able to work on it easily! :eek:

G'ah...and sorry about the double post, as I'm sure Kat is...maybe I need to become a supporting member lol.

You're kidding, right? You honestly think that it's unreasonable to believe that an aftermarket filter (let alone a full CAI system) could offer a performance increase?
No I'm not kidding, nor do I believe that an aftermarket filter will increase performance. (CIA system?, sorry not familiar with that). Normally I would agree with you. The reason I say that is because I recall the old guru (perhaps you do as well) saying that when they designed the Northstar it was done with "clean paper". I do not know "exactly" what that means but basically he said they did not modify an existing engine, like the 4.5 was a modified 4.1 and the 4.9 was a modified 4.5. He said that "Nothing was left on the table" and "All the low hanging fruit had been picked", and I believe that was mentioned addressing this topic. I have no reason to doubt his word. That is what I based the above comment on.

(CIA system?, sorry not familiar with that). Normally I would agree with you. The reason I say that is because I recall the old guru (perhaps you do as well)

i think he meant cai and by cai he meant cold air intake

(CIA system?, sorry not familiar with that)

I have guessed that he was abbreviating "cold air intake", and CAI, not CIA.

EDIT: Jesus, I'm not awake. Sorry OffThaHorseCEO :-P

I have guessed that he was abbreviating "cold air intake", and CAI, not CIA.

EDIT: Jesus, I'm not awake. Sorry OffThaHorseCEO :-P

Exactly. I'm not the one that spelled it CIA.

DUH, Thanks.

That's real cute. Somebody dumped my last post. Why?

You had 1 that was in triplicate so I deleted two of the three.

Anyone thought of opening up that scrawny inlet port that leads from behind the headlight and into the ECM box?

i meant pcm.

Anyone thought of opening up that scrawny inlet port that leads from behind the headlight and into the ECM box?

I was looking at mine and the "Foam" gasket had slipped down and was obstructing 1/2" the whole width. Took it off and fitted some weatherstripping. The opening is probably 15 to 20% larger with it gone.

The next restriction is the double layer within the airbox. It also looks as though the conection between the air box and "Filter" box is not airtight and should be gasketed.

In my experience there isn't much under the air box except an inner fender or an exhaust manifold. Neither of which will help air flow even if you did drill holes.

An aftermarket air box such as http://www.autopartswarehouse.com/performance/basket.php?brandid=1537&partid=15&makeid=4&modelid=22&year=2001

Will do more good than drilling holes.

Don't think that'll fit the 96 or 97 though.

Oops, Sorry I wasn't paying attention. Now that you say that, I did meet a fellow with a 97 STS who drilled the air box and claimed that the throttle response was better on the low end. He couldn't really tell weather the top end was stronger or not.

I would just make sure that it's not in vein and that there isn't a restriction underneath that will make the drilling pointless.

Don't think that'll fit the 96 or 97 though.