This is for those who want to get back missing HP but still retain the quetness of the stock airbox.


First:

Tools to do the job.

1 two inch hole saw
2 two inch desk grommets
1 Glue or adhesive. I recommend Hotglue, PVC Cement, Super Glue or Rubber cement.
1 Round file, sand paper, emery cloth, drum sander or deburing tool.


The total for these parts was $9.60 from Lowes.

Now locate a place to bore.

I chose the side of the box which later turned out to be a bad idea.


Now debur the hole and clean it up.

 

Now apply the grommet. And do any trimming or cutting to it for a proper fit.


Partially closed.

Completely closed.

 

Here is where I noticed I made a mistake. There isn't enough clearance when the filter is in place.

So I cut the depth of the gromet to make it fit.


Now for the front side install.

Locate and bore the hole.

 

Deburr the hole, clean it up and install the grommet. Don't forget to apply a few small dabs of glue.


Inside look.


Finished product cleanly installed.

 

This thing is so quiet you can't really tell that it's even been done. It seems to make power too. Only a trip to the 'Humblemaker' will let me know for sure. It could actually stand to be a 3" hole and grommet based on what I have seen so far.

 

somebody skipped work today. must have been the nachos from last night.

 

Kind of an evolution of the ghetto box mod and OSACI(sp?).

Anyways, looks like a good mod to allow you to keep the filter from getting real dirty until you make it to the track.

 

Very beautiful and definatly worth posting this on the howtos page... You should link this to the vqpower website... Job well done... worth skipping work if you tell me...

 

One question, the more holes we have is it the better chance of more airflow? Or would you say that two is the maximum we should have(like yours)? How hard was it for you to take out your airbox?

 

Possibly. But even this little bit of extra air is enough to do the job. I may redo the second hole with a 3" grommet since the whole thing is even more quiet than I expected.

 

Looks very clean. Amazing how many 'car parts' you can find at a hardware store!!

 

I actually did this in about 1 hour after I got home from work.

Haydn was just joking.

 

Thanks for the complements guys!

I had to make it this clean and stealthy to be 'dealer' resistant.

Lowes roXors.

 

Silent but deadly. Nice job.

 

OK , if something is wrong with your car and the dealer opens the hood, he's not going to see the two holes in the box? He works on the cars for a living. Nice idea but I don't see it being more stealth. I do see it being very quiet for those that don't want noise. Nice job!

 

First of it looks to be a clean install. Only a trip to the dyno could reveal if it actually is producing a good increase in power.

The only thing that you might consider doin along wiht this is the 3" vent goin to the bottom to route in more air (yeah I know its kinda noticable) But those holes you bored out will be letting in air directly from the engine bay. Dont get me wrong im not saying it sucks, just questioning if its an efficient design or can it be improved on....
Its better then the stock air box that cant be argued, nice job though looks like a really clean setup.

 

Would it make sense for me instead of drilling mutiple holes and drill a Fat hole in the front of the airbox? and the same on the side? Sorry for the dumb questions, but i want to get it down 100 percent before i do something and Doh!!! i mess up.... But I like yours a lot better than cutting the filter lid thingamabobfizzizelmynizzal.

 

It's not as obvious as having a BLING BLING Frankencar staring you in the face when you pop the hood.

Most of them won't even notice this and most of the ones that do won't even bother to comment on it. Thats why I say dealer 'resistant' .

 

Yes it would. That's exactly what I was trying to convey. The side port is a fluke so don't do it.

 

That looks good. Is the power more noticleable than an intake. When I installed the stillen intake in my 2K I really didn't notice any gains. Even when I tried the OSCAI I didn't notice that either.

 

are you thinking about doing an OSACI? if so, i mean if (no pressure),please do detailed writeup like your current one and tell us how the car runs afterwards...

 

Anything can be improved on and there are still a few rabbits in this hat that I haven't pulled out yet.

I have spent alot of time on the dyno with this car and this airbox. I proved long ago that a K&N panel or no filter at all would make a 0hp increase. But by totally removing the cartridge and nothing else yeilded +9hp at the wheels. Therfore the GAB and my ported design will give you back that power by allowing just that little bit of extra air that the main inlet restricts.

 

Fluke?? Phew, i was about to plan on making one on the side. Does it hurt to have one on the side though?
I gotta say, this stuff is helping out a lot of people... thanks.

 

You can if you really want it. I screwed up and didn't account for filter clearance.

 

I like this idea, but what about...

Doing the holes in the airbox like shown here. Then... instead of the stock scoop and the elbow, ect. a la GAB, just hook a hose to the inlet of the middle airbox piece (sorry I don't know th ename of it) and run that hose to the splash guard. Wouldn't that get the best of both worlds, and then if you need to return to stock, just take off the hose and put back on the stock air scoop!

 

I wonder if it would be beneficial to cut holes in between the "ribs" on the filter holder and cover with black "screens". This would not attract too much attention, and would not require removal of air box.

 

 

SR20DEN,Nice job
This mod should be in the "HOW-TO" sticky up top

 

SR20DEN I wasn't knockin your idea, I really like it, just thinkin of a way to get cold air benefits as well, without cutting the elbow off the air scoop/.

 

Ahhh, well......it is a better way to get the colder air in, you got that part down well. BUT, its like a straw for suckin in water. Thats the one reason I like the GAB, it has 3 openings allowing for cold air to enter but if the lower part becomes lodged in water there will be no vacuum created due to the other two openings. I think that with a bit more thought applied to it, we may come to a between of the GAB and the PAB. I think the best combo would be to keep the scoop in the front to lead in outside air, and the bottom part of the scoop routed to the bottom once again outside air. If you do not want to cut the airfilter holder then slap on two ports on the box and leave it as is. It should flow just as much air as the GAB but quieter. Maybe 3" ports would equal the flow of the GAB.
Just my .02 on the subject.

 

See I live in Los Angeles, we don't really worry about rain for 9 months out of the year. From dec-feb i can use the stock air box.

 

Its all good 4u then, Im speaking mainly for other places as well but I know how LA is im there every few weeks. What part you in anyway? Just out of curiosity...

 

No I wasn't taking it as a knock. I quoted my earlier message to mean that there are many different things that can be done with it. I just brought it to this point and it's upto everyone elses imagination as to how much further they want to take it. Part of the reason I put on the side port was to make it easy to connect a cold air tube from the ground. Water won't be a problem because that isn't the only inlet so if it gets submerged air would be sucked in through the normal route.

Let the ideas fly folks, thats what it's all about.

 

I got some ideas...

 

I hope its not sexual....

 

OR involves Donkeys!

 

Whats next flyin ****zues

 

If anyone gets a chance to do a dyno with the PAB or GAB, please post some numbers.....

 

This is an excellent mod to the GAB and I bet it will work really well.


I posted an idea on the .ORG about 4 weeks ago which was similar to this idea, but with one key change. What do you all think about using a spring loaded flap which would automatically open and close the new breather holes based upon intake vacuum? I haven't really had time to look for parts, but a low tension spring might do the trick. This is the same idea, in reverse, that Nissan is using in their variable muffler system . . . a flap opens in the muffler when there is a lot of back pressure in the exhaust.

The key benefit to have the flap system is that in the flap closed state, torque will be preserved and the car will be quiet at low rpm's. When you need the extra air (at higher rpm's) the flap would open and allow in extra air.

I also was thinking that some type of external cover (to prevent water ingress) might be a good idea too . . .

Unfortunately, I just don't have time to put these ideas to work, but may be one of you does?

 

Not a bad idea... I guess it would depend on how much one wants to spend on this project.... how much time they want to put into it also.. Some people like their cars loud...