Easywolf32

What would be the pros and cons of adding a AFE Stage 2 Cold air intake & Flowmaster 50 delta flow?

Has anyone added an AFE Stage 2 Cold air intake and than removed it and went back to stock? If yes, why?

As for adding an entire FLowmaster 50 Delta Flow Force II Kit, someone said that the Jeep's pipes are already stainless steel and no point in changing them... Which parts of the exhaust system would you change than? The tailpipe and the muffler?

Also, which of these cons would still apply to the newer AFE Stage 2 Cold Air Intake: (Taken from a post written in 2008)

So What Do We Know about Cold Air Intakes:
Pros:
1. Eliminates stock airbox (may be necessary for custom fenders)
2. Improved HP and TQ by about 2-3% at ~4500rpm (Engine max: 5200rpm).

Cons:
1. Expensive - brand name kits cost around $150+
2. Cleaning - open element filter is exposed to much more dirt, mud, dust and debris from engine compartment.
3. Thin film of dust typically passing through filter, thus the engine is exposed to this dust.
4. Oiled filter versions further attract dust, dirt and debris.
5. Due to inadequete filtering, a Outwears Pre-filter, or similar filter sock is required, further adding to cost.
6. Requires frequent cleaning due to dirty environment - typical cleaning kit costs $20+.
7. Increases risk of hydrolocking - exposed element can suck water into engine easily.
8. Noise - annoying "sucking" noise can be heard, sometimes associated with a loud whistle.
9. Dirty filter can cause rough and/or high idle.

dave1123

IMHO, the stock intake and filter system flows as much air as the engine needs and IS a cold air intake because it takes in air from in front of the radiator, not warm underhood air. It also has a slight ram effect because it uses air forced into it by the car's forward motion. Tests have shown the stock air filter will flow more than 4 times what the engine needs with no pressure drop.

The Flowmaster is a good call though. Reducing backpressure is good.

Remember that cylinders fill by intake air pressure. At higher rpms, volumetric effeciency suffers due to air's inertia, UNLESS PRESSURE is increased! That's why turbos and superchargers work so well.

Also remember that the factory has produced an engine that balances power output with longevity and all the electronic controls are there for that purpose. Any changes can upset that balance.

Easywolf32

Wow great answer thx.

Could the flowmaster disrupt the stock signals you think?

basegrinder

I'd get it for the mileage. I got an extra 5mpg on the freeway with a super 44. City driving went up about 2mpg

dave1123

I don't think it will effect the 02 readings any. The downstream sensor is only there to check on the cat's effiency. The mixture isn't effected by the this.