Originally Posted by pethel

Congrats on the good deal. I have no comment on the heat issue from the aluminum pipe.

I have had the K&N FIPK "The one with the plastic pipe" for 5 years now on my '04 3v 5.4.

I can vouch for the lean condition on the stock tune. Also a little rougher idle. I ran it like that for a couple years and didn't blow it up and it ran good.

I since have got a custom tune for the K&N on a Superchips tuner. This did make a huge difference in performance and now I know its safe.

If you know of someone local to you with a dyno, take it to him and ask him to run it to check your air/fuel ratio to be safe. Thats what I did and had an eye opener.

I installed my K&N and got the same negative comments from others as you have. I did some reading and then learned about the lean condition created by the CAI.

Good Luck

Originally Posted by 4.6 Punisher

The 06+ 3v 5.4's have an adjusted tune to help prevent the lean condition. You should be fine to use it without having to worry about the engine damaging itself. You still aren't gaining anymore than a few HP without a custom tune.

Originally Posted by expy03

Enjoy. The truck looks good and really cleans up the engine bay for sure.

Don't worry about the comments. There are the usual 5 or 6 that have all of the knowledge and are quick to pass it on.

The comments about the "warm air intake" are unfounded. The stock intakes are not "cold air intakes". Just get a scanguage and monitor intake temps on a stock vehicle. All pull in hot air until the vehicle is moving, then regardless of type of intake, the temps all drop down to the same.

And how soon we forget that for years, all intakes were made of metal. Plastic only started as a weight saving measure, and ease of production.

So enjoy.

Originally Posted by rockstar22

Thanks bro I really appreciate the support. I think it looks clean and sounds great! As for the HID kit I also swiped those off of Craigslist BRAND NEW for $50 bucks. ( I'll probably get knocked down for that too ) They are a cheper brand "XENTEC" 10,000k and I love them. I've never had any problems with them and they were all plug and play. Thanks again

Originally Posted by 4.6 Punisher

The 06+ 3v 5.4's have an adjusted tune to help prevent the lean condition. You should be fine to use it without having to worry about the engine damaging itself. You still aren't gaining anymore than a few HP without a custom tune.

Originally Posted by MGDfan

Nope. O4+ 3V's.

Adjusted tunes to address the CEL threshold, for a stock intake, but they still cannot and do not account for MAF venturi changes incurred by a tube geometry change.

This is well-known, well-documented, and well-discussed (a sample of which is evident in my previous post).

Only direct measurement can tell you with certainty.

MGD

Originally Posted by MGDfan

Nope. O4+ 3V's.

Adjusted tunes to address the CEL threshold, for a stock intake, but they still cannot and do not account for MAF venturi changes incurred by a tube geometry change.

This is well-known, well-documented, and well-discussed (a sample of which is evident in my previous post).

Only direct measurement can tell you with certainty.

MGD

Originally Posted by 4.6 Punisher

It's less common in the 06+ 5.4's than the 04's and 05's. It's still not perfect, but it's less lean than it would be with an older tune.

Originally Posted by MGDfan

Buddy - again - the revised calibrations are intended for stock intakes only, where the OEM MAF Transfer Function is already known.

There is no way for that OEM MAF TF to accomodate any changes to same that an aftermarket Washoobi will impact. The tuners are quite clear on this point - TP, VMP and PHP - even for '09-'10 trucks.

This forum is full of info related to this. It's the reason even canned tuners include some MAF TF-corrected tunes for selected Washoobi's - Superchips & Diablo as examples. For all MY trucks with slot-style MAF's.


MGD

Originally Posted by 4.6 Punisher

Yes, I know that they don't compensate for an aftermarket intake. But they didn't come out of the factory with a borderline lean tune like the 04 and 05's. It's still running somewhat lean, but not as bad as the older tunes. It won't trip a CEL on the 06+'s.

Originally Posted by tbear853

Well ... if it means much ... you likely reduced air intake restrictions from what they were when the stock filter and intake tube were in place, and it shines. You have an '07 and there's some evidence no harm will come... and so if your happy, maybe all's well.

Just be ready to clean that MAF sensor.

Originally Posted by 98Expedition10

Rockstar:
That K&N Intake looks good. However I set up my K&N filter directly onto the OEM intake since I bought my 98, and so I never invested in any more intake additions.