Increased air flow?

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JohnnyBoy425

NAXJA Forum User

Location

Indianapolis

• May 31, 2008

• #1

So, I had the idea to cut the hole for my stock airbox larger to "increase" airflow. Would that work? I have a high flow K&N panel filter in there, and was thinking maybe a bigger air intake hole could get the most out of it. Any thoughts?

 

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whompinxj

NAXJA Forum User

Location

ChiTown

• May 31, 2008

• #2

Hey it can't hurt. Right?

 

M

MTBracer367

NAXJA Forum User

Location

northeast pa.

• May 31, 2008

• #3

i did it in mine worked out great u could here the intake a little bit more too then and i actully noticed a slight change in fuel economy

 

B

bjoehandley

NAXJA Forum User

Location

WeGo, Chi-Town, Ill

• Jun 1, 2008

• #4

Did on mine too a few years back, I think I lost mileage, but that could be from enjoying the extra induction roar that accompanied it Instead of chopping up the factory box, I got one from a rolled '97+ XJ to hack up. Been wanting to put a high flow muffler on it to replace the 118k mile original and I'm kinda curious what'll happen after that to mileage.

 

J

JohnnyBoy425

NAXJA Forum User

Location

Indianapolis

• Jun 1, 2008

• #5

Well biggest reason I ask is that I just bought a new dynomax turbo catback exhaust system as well as a magnaflow cat, and want to get the most out of the new system. I figured, what the hell, I'll just cut a bigger f'n hole in the intake

 

XJ Fan

NAXJA Forum User

Location

Livingston, TN

• Jun 1, 2008

• #6

Rusty's Offroad makes a neat little adaptor. Just take out your stock air box put in thier adaptor and you can attach a K&N filter right to the stock intake tube. Go to www.rustysoffroad.com , look under performance / rusty's intake systems. It's an easy intall, about 5 minutes tops, and it works great! No modifications needed, you can go back to the stock air box anytime ( not that you'd want to).

 

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poorboy_616

NAXJA Forum User

Location

Vancouver, WA

• Jun 1, 2008

• #7

Try this:

Pulling the restrictor baffle out of the TB tube seemed to help my upper RPM strength, plus it's free.....

 

X

XJ98Jeep

NAXJA Forum User

Location

Atlanta

• Jun 2, 2008

• #8

Yeah I just took a recipro. saw to mine, but it didn't do anything noticeable. Everyone I talked to said the 4.0 breathes just fine stock. But it can't hurt anything as long as you cut the holes on the fender side so it's breathing colder air.

 

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bjoehandley

NAXJA Forum User

Location

WeGo, Chi-Town, Ill

• Jun 2, 2008

• #9

poorboy_616 said:

Try this:

Pulling the restrictor baffle out of the TB tube seemed to help my upper RPM strength, plus it's free.....

Click to expand...

That was one of the first things I tried to do with my '98 when I got it. I didn't have one in my truck and the OP's truck probably doesn't either.