RE: H3 Hummer Performance Intakes Systems
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RE: H3 Hummer Performance Intakes Systems - 3/12/2008 7:04:31 AM
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Gunner_45
Posts: 1918
Joined: 12/14/2006
From: North Central Texas
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It has a bigger pie hole now.
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ROTM –September 2007
2007 Adventure Pkg, Katzkin leather, CAI, SG II
Rock Rails, SMA b-guard, KC Lites, ProComp 6079’s W/Simulocks, Swamper TrXus MT’s
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RE: H3 Hummer Performance Intakes Systems - 3/12/2008 8:03:33 AM
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Doc Olds
Posts: 3652
Joined: 7/11/2007
From: Boat Town USA (Michigan 48045)
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Yep, into the fender IK.
The factory set up is a plastic moulded tube within like a sleve/bushing that then slides into the air filter box. The factory intake snorkel is appx 6" long and less than 2.7" inside diameter and has that padded flange up against the inner fender. From the outside it looks a lot bigger than it is?
I repalced that with a 3.5" I.D. to 3.0" I.D. funnel shaped snorkel to open it up some. Not rocket science, but more air is better. See what I mean, measuring tape is at the inlet side:
Pic of the AirDocIntake snorkel that replaces the restrictive stock tube.
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Performance Intake Systems : http://airdocintakes.com/
Available for the 2006/2007 and 2008 H3 now!
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RE: H3 Hummer Performance Intakes Systems - 3/13/2008 1:31:01 AM
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TheGunnyRet
Posts: 307
Joined: 11/21/2007
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Not to be party pooper, but the resonater assembly was removed thereby eliminating a source of air to reduce hesitation/starvation and noise in relation to your foot. The revalence to velocity/vacuum then had to be maintained buy opening up another source of air to compensate for the removal of the original source. The filter box is not nescessary your restriction but a noise reduction and heat/moisture barrier. Your Paper filter is the restriction and piping. If you put a vacuum gauge on a stock setup(around or after the resonater) and measure it, and then put it on the modified setup (in the same area of your first measurement)you should see the difference in the rise rate and the speed to which is rises and desends according to your throttle input. Plus your NA engine has a max cfm requirement at WOT once that is reached it doen't matter regarding the opening. I could be COMPLETELY WRONG here, but I base it on experience and the basic commonality in all oem vehicles.
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H3Black2007.5
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RE: H3 Hummer Performance Intakes Systems - 3/13/2008 5:29:33 AM
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Doc Olds
Posts: 3652
Joined: 7/11/2007
From: Boat Town USA (Michigan 48045)
Status: offline
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You lost me Gunny? This is ridiculously simple.
The resonator box can't prevent starvation when in the H3 system because the air within it cannot move to the throttle body without air entering the intake system. Example, take a straw, hold it perpendicular to the horizon, suck water in it, put your finger on top, the water will not leave the straw until your finger is removed from the top!
The faster air can enter the system, the lower probability of starvation. Starvation probability with a 3.5 or 3.7 liter with a 3.5" I.D. intake pipe is irrelevent because the total air volume wihtin the system at idle is more than the engine can conbust. WOT results in a LARGER volume of air through the AirDocIntake than the stock system with resonator box can possibly provide because the stock intake snorkel to the air filter box is less than 2.7" I.D. and the numerous obstructions within the stock system (ie. the stock accordian intake hoses and resonator box) create drag/obsticals to the intake flow. It is like porting and polishing a intake runners in a head, smooth the head of any obstructions or burs, air flows faster, motor makes more power.
In other words, that is why AirDocs have a 3.5" pipe instead of the 3" tube used by the competition. 
_____________________________
Performance Intake Systems : http://airdocintakes.com/
Available for the 2006/2007 and 2008 H3 now!
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RE: H3 Hummer Performance Intakes Systems - 3/13/2008 6:45:48 AM
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HummerGuy
Posts: 6679
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My first "normal" driving condition(s) results are in as far as Mileage goes.
242.1 Miles - roughly 50/50 highway and stop/go driving
14.25 Gallons - 87 octane
MPG - 17 (16.989)
I had the car off when I filled it, and with the last two tanks used the same pump at slow speed with auto cut-off. I know it's not any kind of scientific testing method, but it's all I have for ya right now.
Considering the circumstances, I think in my situation 17 MPG is decent. I'm trying to do all highway miles now starting today, with no stop-and-go since I'm working some early/late hours and haven't hit traffic. I'll see if it goes up at all by the weekend.
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RE: H3 Hummer Performance Intakes Systems - 3/13/2008 12:13:36 PM
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TheGunnyRet
Posts: 307
Joined: 11/21/2007
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quote:
ORIGINAL: Doc Olds
You lost me Gunny? This is ridiculously simple.
The resonator box can't prevent starvation when in the H3 system because the air within it cannot move to the throttle body without air entering the intake system. Example, take a straw, hold it perpendicular to the horizon, suck water in it, put your finger on top, the water will not leave the straw until your finger is removed from the top!
The faster air can enter the system, the lower probability of starvation. Starvation probability with a 3.5 or 3.7 liter with a 3.5" I.D. intake pipe is irrelevent because the total air volume wihtin the system at idle is more than the engine can conbust. WOT results in a LARGER volume of air through the AirDocIntake than the stock system with resonator box can possibly provide because the stock intake snorkel to the air filter box is less than 2.7" I.D. and the numerous obstructions within the stock system (ie. the stock accordian intake hoses and resonator box) create drag/obsticals to the intake flow. It is like porting and polishing a intake runners in a head, smooth the head of any obstructions or burs, air flows faster, motor makes more power.
In other words, that is why AirDocs have a 3.5" pipe instead of the 3" tube used by the competition.
Straw = Resonator Box, Better straw = your Intake
Finger = Throttle Body
I know it is ridiculously simple, and I bet your results in the 6-8 hp to the wheels, though in some ways it is not. Don't get me wrong here your system is the results of logical analysis and basic refinement and I am not arguing that and it looks real good compared to whats out there. I was just noting on IK's comment. But you have to consider all of the computer power put into its original design to meet apeasment of the "common" man/consumer and gov't standards and regulations.
Now we have to come up with a MAS upgrade. I can't wait to get out of here to be homw tinkering in my garage.
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H3Black2007.5
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RE: H3 Hummer Performance Intakes Systems - 3/13/2008 1:04:02 PM
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Doc Olds
Posts: 3652
Joined: 7/11/2007
From: Boat Town USA (Michigan 48045)
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Alright, now I understand Gunny. Doh!  MAS upgrade, also which nobody has for the 3 yet. You be very careful over there my friend, and I look forward to you getting back here to tinker so we can discuss what you come up with!!!! Thank you once again GunnyRet!
I am also aware that part of the improvement I myself have been able to extract on my own 3 is because I have a PCM tune from PCMforless. This is why I enlisted an impartial (completely stock 07 Auto Trans) H3 owner....Gunner....to test for me with no other mods. Anybody is free to ask Gunner questions, I'm sure he will honestly answer them from what he has observed, and measured with the ScanGuageII and mileage data since the AirDocIntake install. That crazy Texan has recorded every gallon of gas consumed by his 3 and the MPGs it has achieved since ownership. 
Well, Gunner does have some nice meaty tires, but otherwise his drivetrain and components are stock.
_____________________________
Performance Intake Systems : http://airdocintakes.com/
Available for the 2006/2007 and 2008 H3 now!
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RE: H3 Hummer Performance Intakes Systems - 3/13/2008 5:29:03 PM
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xzachx2112
Posts: 1408
Joined: 12/30/2007
Status: offline
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im confused about the intake from in the fender, can i get a simple explination? (i have no h3 experience)
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RE: H3 Hummer Performance Intakes Systems - 3/13/2008 7:02:28 PM
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rhill20
Posts: 4549
Joined: 10/27/2007
From: Delaware, Ohio GO BUCKS!
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OK, it came in the mail today and I drove 20 miles home to get it drove back to the office where I installed it
Anyway, it took me about an hour (answering my cell phone in the process). I couldn't believe the difference in pick up on the way home. It really did seem to have better throtlle response off of the line. Seems to run much smoother. Didn't think a simple tube could make that much of a difference. I still have the Airaid filter topless right now as I have to locate the lid  I filled up right before I got home and have alot of highway driving to do tomorrow. I will report back MPG as I get them.
This is the inside of my air box, didn't know if Doc could use it to show the 07 tube in the front:
Resinator Box and Intake tube removed:
Installed without the Airbox lid and the Airaid filter system, it will be added this weekend as soon as I locate it
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RE: H3 Hummer Performance Intakes Systems - 3/13/2008 7:33:15 PM
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Doc Olds
Posts: 3652
Joined: 7/11/2007
From: Boat Town USA (Michigan 48045)
Status: offline
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Hummerguy Mike helped me with some improvements for the instructions. He really spent some time for me on that. Thanks Mike!
Thanks rhill for posting what's up, and you never know, with that Airaid open box you may have the best of both worlds, at least in cool weather. When it gets over 55F outside, I'm thinkin find that box lid. Thanks for the pics too.
Post somewhere what you do with the ScanGuageII when you get it set up, those things are cool.
_____________________________
Performance Intake Systems : http://airdocintakes.com/
Available for the 2006/2007 and 2008 H3 now!
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