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Author Topic: ADJUSTABLE MODIFIED STOCK AIR BOX  (Read 9944 times)

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quicksand

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ADJUSTABLE MODIFIED STOCK AIR BOX
« on: January 20, 2011, 10:16:19 PM »
I have great results on my 4 Banger, with all its mods, accel coil, accel 8mm wires, NGK plugs gapped at .037,  HOME BREWED cold air intake, bigger air tube which is insulated, 4.0L TB bored to 57mm, Custom TB Spacer, Bored out manifold intake, Magnaflow muffler, and free flow cat. All these little mods add up as a whole and not one mod by itself is going to perform well without the other. NOW about the MODIFIED STOCK AIR BOX. I have through trail and error experience that you can manually fine tune you air intake. Of course I have a k&N flat panel filter, and the front of the box is cut out along with a heat shield from the box to the outer edge of rad. I have also removed my headlight bezels. I am getting ambient air from around the headlight right into the air filter box. The removal of plastic chrome rings on my rig looks pretty cool, I guess its because my jeep is white and it gives it that competition look. BACK TO THE AIR BOX. I also cut a hole on the bottom of box which is a exact macth the the hole in the metal fender, right where the upper shock mount is. I have never had a problem with water or dust due to the shock mount acts as a shield. I am getting instant availible air from this bottom hole for crawling or off the line. Now I also cut out the right side of the box, but only towards the front half. So I get instant air from bottom hole and ram air at higher speeds from front and side of box. I have noticed air presure is built up towards the back of the box as I go faster. This is good. Lots of air but keeping it pressurized. I did one more thing. This works really nice. I cut to shape a plate that fits the side cutout n the box that slides back and fourth. It has a slotted hole to allow any adjustments. It has a thumb screw for quick and easy adjustments. I can fine tune my air intake either for faster take offs and real smooth response, or for more torque by closing the sliding plate a bit. I have noticed that any small increment in the slide makes a big change in response. Its like I can adjust my torque. Or adjust for MPG. Or just the right sweet spot. I just think how can one aftermarket cold air intake fit all power plants with different mods. Do we all have the same modifications on all our engines, or do we need taylored air intake for your specific engine upgrades. ADJUSTABLE POWER & TORQUE. WORKS GREAT. Happy 4 Wheeling.
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Offline sharpxmen

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Re: ADJUSTABLE MODIFIED STOCK AIR BOX
« Reply #1 on: January 20, 2011, 11:02:33 PM »
you need to post some pics as i didn't understand all of it

Quote from: quicksand on January 20, 2011, 10:16:19 PM
I have noticed air presure is built up towards the back of the box as I go faster.
explain this one a little bit more please
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'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

quicksand

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Re: ADJUSTABLE MODIFIED STOCK AIR BOX
« Reply #2 on: January 20, 2011, 11:57:53 PM »
Yeah I do not have any pics right now, and its nothing inpressive to look at, but maybe if you like, I can answer any question you have right now. Like what specific part are you needing more detail. Where maybe I could explain in different words or detail. I can take pics in the future, but I do not know when that will be. Right now I am so busy. I love to right about and talk about jeeps and gears and stuff. It is a pleasure.
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Offline sharpxmen

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Re: ADJUSTABLE MODIFIED STOCK AIR BOX
« Reply #3 on: January 21, 2011, 11:38:02 AM »
Quote from: quicksand on January 20, 2011, 11:57:53 PM
Yeah I do not have any pics right now, and its nothing inpressive to look at, but maybe if you like, I can answer any question you have right now. Like what specific part are you needing more detail. Where maybe I could explain in different words or detail. I can take pics in the future, but I do not know when that will be. Right now I am so busy. I love to right about and talk about jeeps and gears and stuff. It is a pleasure.

can you explain this one in more detail

Quote from: quicksand on January 20, 2011, 10:16:19 PM
I have noticed air presure is built up towards the back of the box as I go faster.

how did you notice that or what did you use to gauge the difference?
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'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

Offline stan98tj

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Re: ADJUSTABLE MODIFIED STOCK AIR BOX
« Reply #4 on: January 21, 2011, 12:13:27 PM »
is this all by dyno that you can tell your increase in torque, hp etc? or is this all seat of the pants? i have the intake, 62mm tb, headers, banks exhaust, tb spacer. there is a difference, but not that much. Even seat of the pants i could hardly tell.
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98 TJ 35"Maxxis Trep.Old Man Emu 2.5""+1"BL,IronMan Fab control arms,4.56gears,Ford 8.8+ARB,Currie/IronMan steering, WARN VR10,HP D30 sleeved+ RCV,Body Armor Rock Rails WISHLIST:TDi.Girlfriend hates it :) If you can read this don't flip me over i dont have any $$ left to fix it

quicksand

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Re: ADJUSTABLE MODIFIED STOCK AIR BOX
« Reply #5 on: January 21, 2011, 01:07:34 PM »
Seat off the pants dyno of course. Hey so what if dyno says 8 HP or something like that and you feel nothing or very little. I rather have a dyno that says 3 hp and it feels like 10. Anyway the modified air box fine tunes your air pressure coming in and the amount. I believe the jeeps main brain then adjust for fuel delivery. I know when I am close to that sweet spot, my pedal seems to deliver fuel more precise, thus increasing power. Its like if I want gas just step on the pedal for the required amount. Is not that the way it sould be. You do not want to step on pedal and get more air than fuel. You need a close macth right. AIR, FUEL, SPARK.
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Offline Jeffy

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Re: ADJUSTABLE MODIFIED STOCK AIR BOX
« Reply #6 on: January 21, 2011, 01:14:50 PM »
Sounds like he just cut a bunch of holes into the air box.

Although, if you had a solenoid that could control a vane vent., that might be cool.  Would need to be water tight though.

Or maybe use a SLP Flow-Rite Intake Kit for a snowmobile...
« Last Edit: January 21, 2011, 01:16:57 PM by Jeffy »
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Offline sharpxmen

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Re: ADJUSTABLE MODIFIED STOCK AIR BOX
« Reply #7 on: January 21, 2011, 01:34:54 PM »
this is so random that can't be replicated (and not much to go by without any measurements or pictures)
I'm also going to quit asking questions since they're ignored anyway (the "noticed pressure is built towards the back of the box" - how??? I asked twice but no response)

For a boost in power and torque you can always put in 2 Tylenol and 1 Aspirin pills in the tank (not to be combined with alcohol) - the results are amazing (you can't adjust it though, that's the downside).
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'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

quicksand

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Re: ADJUSTABLE MODIFIED STOCK AIR BOX
« Reply #8 on: January 21, 2011, 05:00:40 PM »
Yes you could say there is bunch of holes or cutouts, but the cutout on the right side of the box has a sliding plate to allow more or less air in. As far as pressure build up, because its the front of the box thats cut, and the front right side, pressure is build up towards the back of the box. The back is mainly a closed container, except for the one hole at bottom of box, right above the shock mount. Thats where the pressure builds up and inters thru the filter, close to the intake tube. Works pretty good. Sorry for not getting back to you sooner
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quicksand

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Re: ADJUSTABLE MODIFIED STOCK AIR BOX
« Reply #9 on: January 21, 2011, 05:08:44 PM »
I guess its like a ram funnel affect, or air tunnel / scoop. with adjustable setting plate.
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Offline stan98tj

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Re: ADJUSTABLE MODIFIED STOCK AIR BOX
« Reply #10 on: January 21, 2011, 05:22:24 PM »
wouldnt it be easier and maybe even better to just extend the air tube out of the vehicle...a snorkel if you will...and then you could get as much fresh, cooler air that would be forced into the snorkel's mouth as you needed. far better than holes in the air box. Also, this would address the watertight integrity raised by Jeffy.
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98 TJ 35"Maxxis Trep.Old Man Emu 2.5""+1"BL,IronMan Fab control arms,4.56gears,Ford 8.8+ARB,Currie/IronMan steering, WARN VR10,HP D30 sleeved+ RCV,Body Armor Rock Rails WISHLIST:TDi.Girlfriend hates it :) If you can read this don't flip me over i dont have any $$ left to fix it

quicksand

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Re: ADJUSTABLE MODIFIED STOCK AIR BOX
« Reply #11 on: January 21, 2011, 07:16:03 PM »
That is a good piont, it you could keep it looking nice some how. Those old hot rodders had something right with there hood scoops and such. But they were able to adjust there fuel and air mix right on there carbs.
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quicksand

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Re: ADJUSTABLE MODIFIED STOCK AIR BOX
« Reply #12 on: January 24, 2011, 05:20:03 PM »
UPDATE ON ADJUSTABLE MODIFIED FACTORY AIR BOX- After trail, and adjustments again again along with many runs down the road. I finnally got my factory air box, adjusted just right. Through using its adjustable air intake plate. Found that exact sweet spot as air is being ramed in. Just the right presure and just the right amount of air for my current mods. After a few runs the main computer made the adjustments in fuel curve to macth the air intake. I tell you what the timing and amount of fuel being delivered along with the air flow, power and torque are at optimum performance. It is true more air makes more power, SO does more fuel especially if you have the exact air/ fuel ratio. I and getting better gas milage, instant off line response, top speed along with torque. So again I say not one cold air filter fits all for optimum results. I highly recomend some type of adjustable air filter intake box. I cant wait to drive my jeep again. FAST and RESPONSIVE. WOW !
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Offline FourbangerYJ

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Re: ADJUSTABLE MODIFIED STOCK AIR BOX
« Reply #13 on: January 24, 2011, 05:25:55 PM »
All this talk without a single PIC...what gives?
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Offline Bounty Hunter

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Re: ADJUSTABLE MODIFIED STOCK AIR BOX
« Reply #14 on: January 24, 2011, 09:11:34 PM »
Quote from: quicksand on January 21, 2011, 05:00:40 PM
As far as pressure build up, because its the front of the box thats cut, and the front right side, pressure is build up towards the back of the box. The back is mainly a closed container, except for the one hole at bottom of box, right above the shock mount. Thats where the pressure builds up and inters thru the filter, close to the intake tube.
How are you measuring this pressure building up?

Are you using an A/F gauge to measure the air/fuel ratio?  Can you expand on how you know your timing and fuel delivery are at optimum performance?
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