Stock Air Box Mod

[jmr]

For this mod a 2.5" hole was drilled into the air box and ambient air duct located under the lower air box.
Next weatherstrip was put on the bottom of the air box around the 2.5" air inlet hole
to seal against the lower ambient air duct.
Then removed the side plastic webbing in the lower air box for better airflow.
This mod resulted in lowering the intake air temperature to 4 - 5 degrees above ambient
where stock was 14 - 16 degrees above ambient.

I'm not worried about water since the original drain holes still exist plus a new 2.5" as well along with a drop in K&N Air filter.

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[Puch]

For this mod a 2.5" hole was drilled into the air box and ambient air duct located under the lower air box.
Next weatherstrip was put on the bottom of the air box around the 2.5" air inlet hole
to seal against the lower ambient air duct.
Then removed the side plastic webbing in the lower air box for better airflow.
This mod resulted in lowering the intake air temperature to 4 - 5 degrees above ambient
where stock was 7 - 8 degrees above ambient.

I'm not worried about water since the original drain holes still exist plus a new 2.5" as well along with a drop in K&N Air filter.

Only asking because I’m not sure of the answer.
Isn’t the factory holes in the box at the water forging height and the inlet to that intake tube well below that height. Wouldn’t this effectively create a straw sucking water in while driving through water below the usual max water height?
BTW it’s a cool idea.

 

[LostWoods]

Only asking because I’m not sure of the answer.
Isn’t the factory holes in the box at the water forging height and the inlet to that intake tube well below that height. Wouldn’t this effectively create a straw sucking water in while driving through water below the usual max water height?
BTW it’s a cool idea.

Yeah I think the tube from the front is below the 30" fording depth. It's not directly ported into the intake and just adds fresh air to the general area the intake draws from so it's not a risk in stock form. OP is now pulling straight in.

Intake air temp means next to nothing in something like a Jeep as long as you aren't pulling from on top of the manifolds or something. The ECU just adapts.

 

[Whiteoak323]

Yeah I think the tube from the front is below the 30" fording depth. It's not directly ported into the intake and just adds fresh air to the general area the intake draws from so it's not a risk in stock form. OP is now pulling straight in.

Intake air temp means next to nothing in something like a Jeep as long as you aren't pulling from on top of the manifolds or something. The ECU just adapts.

Air density is inversely proportional to temperature. Air density is what makes power. But yes, at stock this probably doesn't effect much. But cooler air temps are typically beneficial.

 

[Zachanadandy]

It was an attempt, but not worth it for 2⁰.

 

[ShadowsPapa]

Put a tiny bit of logic into it - these monitor air flow, pressure and temperature and adjust accordingly.
If this was old school - yeah, on race day, sure. It could matter when looking to better your times. A larger difference does matter as I've seen at the track even with modern vehicles (hundredths shaved off in the quarter mile by shutting things down and opening the hood in the staging area - but was it the moister, cooler night air that had settled in by that time???

But for 3 or 4 degrees - meh.
JUST A GUESS, SPECULATION - if that mattered, would Jeep have opened up that area just a little bit? Or could it be that I'd simply be picking more bugs out of the air filter box without a higher power and mpg estimate????

If that tiny bit mattered then we'd feel it in our butts driving on a day that was 4 degrees cooler than the day before.

Cool experiment, though (pun intended) Thinking outside of the air box.

 

[jmr]

On my Scat Pack Challenger I added the Hellcat airbox and head light air tube. By doing so it dropped the IAT by 2 degrees that's one of the reasons why SRT designed it. The lower ambient air tube isn't blocked off so water will flow through as originally designed.

I've found what this 3.6 needs is a 5.7 or 3.0 Hurricane. Why is the RAM/Challenger tuned for 305HP and not the JL?

 

[Hootbro]

Why is the RAM/Challenger tuned for 305HP and not the JL?

Ram and Challenger use a different generation Pentastar for one thing. I would also think with at least the JT, there is considerations for engine cooling due to towing and being more conservative on the tuning.

 

[Lunentucker]

Thoughts and Prayers

 

[Vtur]

Yeah I think the tube from the front is below the 30" fording depth. It's not directly ported into the intake and just adds fresh air to the general area the intake draws from so it's not a risk in stock form. OP is now pulling straight in.

Intake air temp means next to nothing in something like a Jeep as long as you aren't pulling from on top of the manifolds or something. The ECU just adapts.

^^^ This is exactly how the front tube function. Just providing fresh cold air to the air box.

 

[LostWoods]

Air density is inversely proportional to temperature. Air density is what makes power. But yes, at stock this probably doesn't effect much. But cooler air temps are typically beneficial.

I mean yeah, but the comment was in context and even dropping the intake charge 100F from normal would only net maybe 20hp and even then it only matters at the limit. Air temps matter more for emissions reasons and in forced induction where compression significantly heats the intake charge.

^^^ This is exactly how the front tube function. Just providing fresh cold air to the air box.

But it's not doing that in the factory design, it provides clean air near the airbox but it's completely open on the airbox end.

 

[Vtur]

I mean yeah, but the comment was in context and even dropping the intake charge 100F from normal would only net maybe 20hp and even then it only matters at the limit. Air temps matter more for emissions reasons and in forced induction where compression significantly heats the intake charge.



But it's not doing that in the factory design, it provides clean air near the airbox but it's completely open on the airbox end.

That's correct, but it does somewhat connected, just not a fully sealed connection to the box.

 

[Zachanadandy]

Ram and Challenger use a different generation Pentastar for one thing. I would also think with at least the JT, there is considerations for engine cooling due to towing and being more conservative on the tuning.

The V6 ram has the same towing and higher payload ratings....

 

[Hootbro]

The rv6 am has the same towing and higher payload ratings....

The full size RAM has a way bigger frontal area and higher radiator capacity.

 

[BourbonRunner]

Sort of like the "deckplate" mod we did to our 1G Tacos and 2/3gen 4Runners. Get a 4" deck plate and silicone from West Marine, cut it into your airbox and seal around it. When you're not in jeopardy of water intrusion (IE daily driving) remove the plug, and get a better note on the highway.

Doubt it affected MPG or HP but it sure did sound nice.

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