Topic: Home built cold air intake revisited.

[gomi]

hmm....I wonder if you could use the 4.0l tube, and then add your own cone filter to the end of it and remove just the top of the stok air box and use the bottom half as a makeshift heat shield. With a little modification, I wonder if it would work. :?:

[dexetr30]

I think it would work just fine with a little planning and some modding. I'm ordering a 4.0 L intake from ebay this weekend and having another go at it.

[chardrc]

wow i dint even think of that even after watching my dad put a k&n air filter in his rubicon which is a 4l.. that would be way easier.

[Jeffy]

hmm....I wonder if you could use the 4.0l tube, and then add your own cone filter to the end of it and remove just the top of the stok air box and use the bottom half as a makeshift heat shield. With a little modification, I wonder if it would work. :?:

Some people cut off the flexy end and put a filter there but I can't see it being that good.  It would be hard to build a box since it's over a huge area.  Modift the opening on the box and you could get just as much air in.

[chardrc]

on our old cj3a it had the stock oil ari filter on the pasenger firewall were the battereis go on the new yeep and we took that out and just put a k&n cone over it in some thabric protector thing and it seems to be working good..

[dexetr30]

wow i dint even think of that even after watching my dad put a k&n air filter in his rubicon which is a 4l.. that would be way easier.

Yes but putting a stock sized K&N filter in the box to replace the original filter (if that is what you meant) is different than replacing it with a reusable conical style filter. Conical filters have more surface area so the throttle body ends up getting more air.

On another note...I don't see things being also difficult to try and make the stock air box into a ram air type system. Just take the horn shaped inlet out, replace it with 3" flexible hose and route it to somewhere that gets fresh moving air. You can just leave the stock filter right in the air box or even replace it with a K&N.

[chardrc]

ya i know its different buit i was saying that i didnt notice that the airbox was on the other side of jeep so they had the tube going over the motor.

[chrisfranklin]

I'm using on of those EBay jobs -- "3" aluminum intake tube + no oil K&N-type filter-- that I bought for $30 about a year ago.  Its ok.  Just search under "Jeep intakes" on EBay.

But, today I just bought a stock Jeep 2.5 airbox and tube off Ebay for $25 for emissions purposes.  Threw original one away because I had already cut in to the thing, so it wasn't really stock any more by a long shot.

May go back to the air box setup permanently -- torque will improve as will brake firmness, probably.  Also won't hurt when going up against CARB emissions testing later this year.  

I miss the torque, what little of it there was pre-open filter, too Course, now there's going to be less high end on highway on ramps. But we are talking a 2 solid axle ride here, not a sports car.

[dexetr30]

ya i know its different buit i was saying that i didnt notice that the airbox was on the other side of jeep so they had the tube going over the motor.

Personally, I don't like the route it takes over the exhaust manifold. It heats the air coming into the intake make it less dense befor it enters the throttle body. It's ok in the winter for those cold mornings but otherwise... I don't think it's so great.

[dexetr30]

I'm using on of those EBay jobs -- "3" aluminum intake tube + no oil K&N-type filter-- that I bought for $30 about a year ago.  Its ok.  Just search under "Jeep intakes" on EBay.

But, today I just bought a stock Jeep 2.5 airbox and tube off Ebay for $25 for emissions purposes.  Threw original one away because I had already cut in to the thing, so it wasn't really stock any more by a long shot.

May go back to the air box setup permanently -- torque will improve as will brake firmness, probably.  Also won't hurt when going up against CARB emissions testing later this year.  

I miss the torque, what little of it there was pre-open filter, too Course, now there's going to be less high end on highway on ramps. But we are talking a 2 solid axle ride here, not a sports car.

A blower or turbo would be nice for those on ramps. Of course... that's more cash than I have to throw at my Jeep right now. :cry:

[Jeffy]

Well, it also helps that that Jeep has an extra pair of cylinders, too.

As for freeway onramps, my Jeep seems to be awfully quick.  Although I'm reving it higher and shifting for power.  The problem I have is when the Jeep gets over 45-50.  Getting it up to 65 takes a little while since I've got to merge in and not run into any slow cars or cut off faster ones.   This is one oe the reasons why I think a centrifugal would work nicely.

BTW: if the air box is removed, you will need to replace it with something that has a CARB sticker.  Snorkels get around this btcause they leave the stock airbox.

[dexetr30]

Well, it also helps that that Jeep has an extra pair of cylinders, too.

I thouht I had originally posted this one also... Guess not. 4 Banger:

[SMC4WD]

Can I use Homer twice??   Drool....

[chardrc]

there we got the 4banger...

wow taking it all the way up to 65 hundred .. i dont think my motor would handle that anymore.. ill get it up to 4grand but not over it... and other people do get anoying cux ether i have to go all out or im slow and cozing traffic jams ...