DWV Intake Mod for 2004-2008 F150 with 5.4L Engine
#47
03-31-2009, 09:22 AM
#48
03-31-2009, 09:28 AM
#49
03-31-2009, 05:39 PM
Member
#51
04-04-2009, 10:44 PM
I did this mod about 2 weeks ago, had to use PVC instead of ABS pipe (black ABS is impossible to find around here) and instead of painting it I wrapped it with electrical tape, for some reason I think that paint would just flake off after a couple of months. Looks good enough to me.
It's amazing that the 3" pipe fits almost perfectly inside the bellows on the stock intake, almost like it was make to fit the 3" pipe.
When I first put it on, the downspout adapter seemed like it wouldn't hold inside the fender wall hole, even with the bellows compressed, but it hasn't popped out yet. Must not be enough vibration in there to jar it loose.
It's amazing that the 3" pipe fits almost perfectly inside the bellows on the stock intake, almost like it was make to fit the 3" pipe.
When I first put it on, the downspout adapter seemed like it wouldn't hold inside the fender wall hole, even with the bellows compressed, but it hasn't popped out yet. Must not be enough vibration in there to jar it loose.
#52
04-05-2009, 02:58 AM
Member
#53
04-10-2009, 06:59 PM
Downspout problem
Just an FYI to all those who have done this mod...check your downspout rubber adapter.
On a recent trip doing a lot of mountain towing, I did a routine engine check during a gas stop. I noticed the plastic air intake tube going to the fender was loose. Low and behold the downspout rubber end that goes in to the fender hole had sucked itself backwards in to the tube. It didn't come off the tube or anything but there was definitely both a restriction and engine compartment air getting sucked in to the engine.
Unfortunately I didn't get a pic but I did solve the problem by inserting a 3" OD plastic fitting with an 1/8" shoulder on it in to the downspout end. This prevents the end from collapsing. Best I can describe the fitting (I had it laying around on a shelf in the garage) is and EMT type collar, you know, the gray colored stuff used to run electrical underground. Should be able to find a 3" OD one at Lowes or Home Depot.
Some may not have this problem but those who tow and are at wide open throttle for a lengthy period of time may have this happen so beware!
On a recent trip doing a lot of mountain towing, I did a routine engine check during a gas stop. I noticed the plastic air intake tube going to the fender was loose. Low and behold the downspout rubber end that goes in to the fender hole had sucked itself backwards in to the tube. It didn't come off the tube or anything but there was definitely both a restriction and engine compartment air getting sucked in to the engine.
Unfortunately I didn't get a pic but I did solve the problem by inserting a 3" OD plastic fitting with an 1/8" shoulder on it in to the downspout end. This prevents the end from collapsing. Best I can describe the fitting (I had it laying around on a shelf in the garage) is and EMT type collar, you know, the gray colored stuff used to run electrical underground. Should be able to find a 3" OD one at Lowes or Home Depot.
Some may not have this problem but those who tow and are at wide open throttle for a lengthy period of time may have this happen so beware!
#54
04-23-2009, 09:34 PM
#55
05-01-2009, 10:53 AM
New member, first post. Bought an '06 four months ago and I will slowly make some changes as money and time permit. It is completely stock. Did this intake mod last weekend and it was very easy. Cost less than $10 for all of the parts from Lowes. Disconnected battery while making changes. Afterwards, the engine ran bad for two days. I guess the PCM needed to learn again. Now, it is running like before but I cannot say I notice improvement. The throttle response still lags and the performance is not what I would expect from a 5.4. Thanks.
#56
05-10-2009, 11:00 AM
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#57
05-10-2009, 11:30 AM
New member, first post. Bought an '06 four months ago and I will slowly make some changes as money and time permit. It is completely stock. Did this intake mod last weekend and it was very easy. Cost less than $10 for all of the parts from Lowes. Disconnected battery while making changes. Afterwards, the engine ran bad for two days. I guess the PCM needed to learn again. Now, it is running like before but I cannot say I notice improvement. The throttle response still lags and the performance is not what I would expect from a 5.4. Thanks.
__________________
Jim
Jim
#58
05-10-2009, 11:32 AM
It takes several driving cycles unless you clear it by disconnecting the battery. I disconneted teh battery while I did th mod. Leave it disconnected 20 to 30 minutes and turn the lights on.
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Jim
Jim
#59
05-15-2009, 02:02 PM
I did the Gotts intake mod on my truck which is basically identical to this and everyone at F150.net bashed me and said I was going to burn up my engine because it will be running lean. Even if it does run lean it would only be at WOT which I seldom go anyway. I'm glad someone actually had dynoed one and has firsthand experience and not just a bunch of dumbasses repeating what they've read.
What I want to know is how much flow can a 3" ID pipe flow uncompressed? I would imagine the larger the pipe the better, Or at least eliminating any bends, or rough surfaces on the inside of the pipe would be best...
