The kd4crs/Power Hungry/Gotts Mod (revisited - and with pictures)

[Jackpine]

Originally Posted by Extreme Justice

So Bill what your saying is that we wouldn't have to get NEW TUNES for this Mod? Not like we would if we bought a CAI off the shelf.

That is EXACTLY what he said - and the only reason I tried this mod myself!

- Jack

[Jackpine]

Other than the "sexy" look of the commercial CAIs, I wonder why anyone would want them? Trust me though, I wouldn't have tried making one myself if I hadn't read Bill's thoughts on this!

Even though I love to argue obscure points, I recognize Bill's expertise in this area and I know, "I can take it to the bank".

Thanks again, Bill and Corey, for creating a forum that so far, allows us to "think out loud" and not be afraid of sounding stupid!

- Jack

[kokopellimotorsports]

Yes, thank you Bill and Corey for the forum.

[glockwinger]

Originally Posted by JackandJanet

Other than the "sexy" look of the commercial CAIs, I wonder why anyone would want them?

- Jack

Well, when I was once dumb and impressionable ...someone sold me on the idea of doing a few mods to my truck. I wouldn't do most of them again, the CAI for starters. Just wasted my money. I wish I had the info then that I have now...it would have saved me and

[Mark_123]

So I found this 12" piece of 3" black rubber-coated flexible PVC used for fish ponds (that was a mouthfull) Anyway, I removed the snorkel, inserted the 3" pipe into the intake, then inserted the other end through the first fender wall hole and into the second fender hole. I heated the end of the pipe in hot water to make it more pliable before pushing it into the fender. I then used a black worm clamp to seal the 3" pipe in the intake leading to the engine. Overall....I'm impressed!

I had the snorkel off for a few days just letting it breath the engine bay air. The intake air temp (IAT) seemed to always be at least 10 degrees higher than ambient temp while driving. Of course, if the truck was stopped at a red light, the IAT may go to 30-50 degrees higher than outside air temp (OAT). So now with the little extension added on, the IAT=OAT while driving. Pretty cool if you ask me. I can post photos when the snow melts and the temp climbs back up (currently 20 F). Thanks to all for your ideas and pics!!!

Mark

[Jim Allen]

Pretty coo1!

I'm new here and hesitate to start in such a way, but at the risk of being labeled a "Negative Nelly" after my first post.... is there any proof these mods actually increase airflow? The reason I ask goes back many years to my days as a Land Rover tech.

Late '80s and early '90s EFI Range Rovers had a "trumpet" on the end of of the air cleaner, similar to the part that was replaced in these examples. It necked down to a diameter many people were sure was restrictive, so they lobbed off the trumpet thinking it helped airflow.

I thought it would too, but then I took a bunch of air filters to the late, great Earl Davis for flowbench tests back when he was running the test lab at K&N. I had both a standard Range Rover filter with the trumpet and one modified similar to the way this Ford one is done. No significant difference in airflow. In fact, the trumpet actually flowed slightly more. Earl postulated that the trumpet design actually had something to do with that, smoothing and consolidating air flow, much like velocity tubes will do on carbs. I later backed that airflow test up with a dyno test.. no difference in power the chassis dyno could pick up (admittedly, chassis dynos are "numb" to small changes). Operationally, you couldn't tell a difference, except that the modified horn was noisier.

I won't say definitively that the Ford mod will flow more, or less, than the stock setup because I haven't tested it, but previous experience leads me to ask the question at least.

I have limited access to a flow bench, so in theory, I could test the various permutations of this filter. I have a stock filter from my '05 5.4 F-150 (I am running an AEM CAI). If we wanted to do a test, I could probably make that happen. Bill can vouch for me. I hope!!?

[Grabber523]

Originally Posted by Jim Allen

Pretty coo1!

I'm new here and hesitate to start in such a way, but at the risk of being labeled a "Negative Nelly" after my first post.... is there any proof these mods actually increase airflow? The reason I ask goes back many years to my days as a Land Rover tech.

Late '80s and early '90s EFI Range Rovers had a "trumpet" on the end of of the air cleaner, similar to the part that was replaced in these examples. It necked down to a diameter many people were sure was restrictive, so they lobbed off the trumpet thinking it helped airflow.

I thought it would too, but then I took a bunch of air filters to the late, great Earl Davis for flowbench tests back when he was running the test lab at K&N. I had both a standard Range Rover filter with the trumpet and one modified similar to the way this Ford one is done. No significant difference in airflow. In fact, the trumpet actually flowed slightly more. Earl postulated that the trumpet design actually had something to do with that, smoothing and consolidating air flow, much like velocity tubes will do on carbs. I later backed that airflow test up with a dyno test.. no difference in power the chassis dyno could pick up (admittedly, chassis dynos are "numb" to small changes). Operationally, you couldn't tell a difference, except that the modified horn was noisier.

I won't say definitively that the Ford mod will flow more, or less, than the stock setup because I haven't tested it, but previous experience leads me to ask the question at least.

I have limited access to a flow bench, so in theory, I could test the various permutations of this filter. I have a stock filter from my '05 5.4 F-150 (I am running an AEM CAI). If we wanted to do a test, I could probably make that happen. Bill can vouch for me. I hope!!?

I have to agree with your statements here. It's kinda been a nagging question in my head but I'm new here so I didn't want to seem like the naysayer...I guess in my head the "velocity stack" on the intake is there to improve airflow into the intake tube by compressing and accelerating the air as it flows into the tube. Because of the inverse relationship between pressure and velocity, as the diameter of the tube increases behind the inlet and the velocity decreases, the pressure increases (I guess really it's decreasing the vacuum) in the tube. I guess if my theory's not too far off, that "trumpet" inlet tube serves to increase the density of the air charge before the throttle body...does that make sense? It would improve low-end torque and throttle response but cause slight restriction at high rpm.

[kd4crs]

Bill has dynoed this type of mod and it showed no ill effects on the airfuel ratios, long or short term fuel trims, or anything else. He said it showed an increase of 7-8 RWHP in the upper RPMs. If you search, you should be able to find his post on the forums here. I don't remember which thread it was in. The nice thing about the DWV intake mod is that it is completely reversible to be able to return to stock if needed. Nothing is damaged or permanently modified. It leaves no footprint.

[Grabber523]

Originally Posted by kd4crs

Bill has dynoed this type of mod and it showed no ill effects on the airfuel ratios, long or short term fuel trims, or anything else. He said it showed an increase of 7-8 RWHP in the upper RPMs. If you search, you should be able to find his post on the forums here. I don't remember which thread it was in. The nice thing about the DWV intake mod is that it is completely reversible to be able to return to stock if needed. Nothing is damaged or permanently modified. It leaves no footprint.

I'm not saying it would hurt anything except maybe that first off-idle stab of the throttle feel. Your MAF should still see the same volume of air, just at a different rpm because of the change in velocity, so there would be no real reason to have to re-tune for it. I'll probably leave mine alone, but that's me. I don't need to push my power band any further to the right as I already have X-piped true duals which definitely changed the feel of the initial "grunt" off idle. I do think it is a great idea for somone looking for more up top. And is saves some $$$!

[AgentOrange]

Originally Posted by kd4crs

Bill has dynoed this type of mod and it showed no ill effects on the airfuel ratios, long or short term fuel trims, or anything else. He said it showed an increase of 7-8 RWHP in the upper RPMs. If you search, you should be able to find his post on the forums here. I don't remember which thread it was in. The nice thing about the DWV intake mod is that it is completely reversible to be able to return to stock if needed. Nothing is damaged or permanently modified. It leaves no footprint.

http://dygytalworld.ehost-services13...p?t=197&page=2

Post #14