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1,389 Posts
thanks for sharing...i am wondering how much sealing to that hole benefits the intake system. mulling over ideas in my head on how i can make my 09 airbox similar...
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2011 vs 2009 airbox first look
I did some research on the 2011 airbox today. It will not be a direct bolt in as the lower opening
between the 09 and the 11 are not the same. Some cutting on the inner fender will be required.
These measurements are aprox but close
Filter size 2011 100 sq inches
2009 83.3 sq inches
This is not the surface area of the of the filter element only of the outside dimensions.
The opening in the bottom of the 2011 is not a round hole and I don’t
think it will totally line up with the 2009 hole.It is sealed to the inner fender
with no opening to the engine compartment.
The 2011 hole is aprox 15 sq inches
The 2009 is 15.9 sq inches.
The 2011 cover is taller then the 2009.
Currently K&N doesn’t offer an element for the 2011
I won’t be dynoing this setup but it should be good for something.
I’ll post later after the install.
between the 09 and the 11 are not the same. Some cutting on the inner fender will be required.
These measurements are aprox but close
Filter size 2011 100 sq inches
2009 83.3 sq inches
This is not the surface area of the of the filter element only of the outside dimensions.
The opening in the bottom of the 2011 is not a round hole and I don’t
think it will totally line up with the 2009 hole.It is sealed to the inner fender
with no opening to the engine compartment.
The 2011 hole is aprox 15 sq inches
The 2009 is 15.9 sq inches.
The 2011 cover is taller then the 2009.
Currently K&N doesn’t offer an element for the 2011
I won’t be dynoing this setup but it should be good for something.
I’ll post later after the install.
1 - 10 of 10 Posts
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319 Posts
Put an 6.1 SRT airbox on it and fogetaboutit. Same difference.
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7,783 Posts
The "sealing to the fender hole" bit is one of the first things I did. It is one of *many* factors that help to stave off heatsoak on extended drives just a little longer. Though it seems to work a little too well whilst traversing very cold climates. 
Those are one of those times you wish modern engines still had that vacuum-operated hot-air bypass valve thingies from the old days.
Those are one of those times you wish modern engines still had that vacuum-operated hot-air bypass valve thingies from the old days.
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438 Posts
More cold air from outside the engine compartment.
Not quite the same there is more surface area in the 11 filter.Enough to make a difference or worth the effort?
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438 Posts
It's really the inner fender.There is already a hole there for the 08-10 airbox.The 11 airbox has a different shaped hole.I'm still debating if I want to cut the car, mod the airbox or just leave it alone.
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5,013 Posts
My understanding is that you'll also have to relocate the power steering pump reservoir in order to get the new air box to fit. There was some discussion about getting the new power steering pump to replace the old one. Also might have to look at getting a new radiator fluid reservoir.
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1,163 Posts
The colder the air, or the colder the gas, the gas molecules will be smaller.
Means you can stuff more gas into your cylinder for a bigger explosion.
Use to do this on my 1/4 mile car years ago. Heat manifold block offs, cool can stuffed with dry ice, and as cold as I could air intake position.
Means you can stuff more gas into your cylinder for a bigger explosion.
Use to do this on my 1/4 mile car years ago. Heat manifold block offs, cool can stuffed with dry ice, and as cold as I could air intake position.
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438 Posts
The rain stopped and I got to look under the hood.Yes the pump reservoir would need to be relocated.The radiator reservoir would need to be changed.I'm not sure I really want to do this.
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1,163 Posts
No I couldn't. FI ECM cars are a different animal. It was a mod that was used when you ran in a restricted class where you were limited to what you could do.
The science is the same though. That's why the cold air set-up.
It's also another reason that I'm not 100% sold on the CAI systems. Even though the airflow is less restrictive, it has to be really well sealed or repositioned not to suck in some of the heat from the engine bay if possible. Just my personal opinion. I just run a K&N drop in filter into the stock SRT air box.
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