H3 Hummer Performance Intake Systems - Page 2

Mine is in the mail as we speak, I will let you all know as soon as it is installed. Highly doubt that it will wait until the weekend, probably will install it at work  Isn't that what work is for?
 
Thanks Doc, anxiously awaiting.

Hey Doc, let me know when your ready to do volume, I might be able to set you up with a place, they sell off road stuff and accessories, there across Canada, I know one of the guys there who is upper management.

Will do bb.
 
 
 
Brandie, I will let you know.  I'm working on a having an 08 filter made.  We shall see if minimum production makes it practical or not?
 
GunnyRet, thanks for the PM.  I will let you know what comes of it!

Doc,
Count me in on a 08' Alpha intake also. I just installed a custom exhaust so now I need the intake to complete the job. You know what they say "Air in-Air out".

So far, I'm not getting one bit of mileage change, good OR bad, so in theory I'm getting more power with the same mileage.  That's pretty sweet.  I'm almost done burning through my third tank and my mileage hasn't really changed at all.  That's relieving

not to knock the product but I don't understand....the airbox is the most restrictive part of the stock system. Air goes from the airbox to the MAF then to tophat....by keeping the stock airbox you are keeping the amount of air to the MAF the same...so the computer will not recurve the air/fuel mixture to make more power. It may smooth out the airflow but won't pull more air because the stock airbox just wont allow it...this has been tested extensively by chevy high performance in the past...I just don't understand.

It has a bigger pie hole now.

ahhh...into the fender?

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.

 

cool...thanks for the info. that should open it up pretty good. The stock setup was restrictive as all hell in the fender opening.

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.   

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.

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.

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.
 
 

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.  

im confused about the intake from in the fender, can i get a simple explination? (i have no h3 experience)

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

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.
 
 

No problem Doc, I will feed Data as I get it. Really did enjoy the drive home. Just felt like it WANTED to go! Can't wait to see what it does with a PCMtune on it.
 
The install isn't that hard, the hardest part I had was getting the OEM snorkel out of the Airbox. Took me about 10 minutes of fumbling with it to figure out to get a SECOND screwdriver to push the tabs in, kept popping one out and the other would snap back in  Felt kind of stupid after that  Instructions really were very easy to follow if you have any idea of what's under the hood. And if you don't, it included some pretty helpful pic to help you locate everything.
 
I'm ordering my Scangauge tomorrow and as soon as I'm getting real numbers from it I will post them.

Doc; All I have to say is...

THANK YOU FOR THIS MILEAGE!
 
Pretty damn incredible.  This is so far constant 95% highway driving between 60 to 70 MPH @ 40 degrees.  When I got to work today I had 143 miles on my odometer and it barely moved from where it is in this picture.  It looks like the highway mileage is breaking the 20 MPG barrier.  I'm very impressed.

quote:

ORIGINAL: xzachx2112

im confused about the intake from in the fender, can i get a simple explination? (i have no h3 experience)

 
The air filter intake box of the stock system has a intake tube/snorkel that goes thru a hole in the passenger side fender and draws in the air that then gos thru the filter, the intake system, to the throttle body.
 
Pics speak for themselves.
This one shows the hole thru the fender, to the inner fender, air filter box removed.

 
The Stock H3 Air Filter Box removed, looking in the intake flange hole after removal of the stock snorkel.  MAF on the far side goes toward the throttle body.

 
The stock Air Filter Box with lid on showing the stock snorkel thru the fender hole (top center).

 
Does this help?  Basically, the stock system first brings in air thru a narrow platstic tube going into the passenger inner fender, outside of the engine bay to avoid underhood heated air created by the motor/exhaust etc...  The AirDocIntake system replaces the narrow tube (shown back a page at post #34) with a wider and funnel shaped silicone snorkel to increase air into the Air Filter Box, the starting point of the entire intake system.  If it sounds simple, it is supposed to be.

Just an update and I know this is NOT very technical, and it may not sound like much to some. But today was the first time that I've EVER hit 170 miles at half a tank! I didn't change any of my driving habits, in fact I had to "punch it" a couple of times while merging into traffic. 


 

AirDoc,

I have been searching for intake setup ideas that utilize the stock MAF location and airbox, so I came over to the H3 forums from the Colorado/Canyon forums for ideas and stumbled across this thread.
I am not in the Detroit area, but I have lots of mechanical knowledge and could provide lots of feedback, images, writeups, and recommendations for your Colorado/Canyon setup if you would be interested.  I also track my fuel mileage consistently and could provide feedback on mileage increases for the Colorado/Canyon platform. 

Please PM me if you are still interested in a Colorado/Canyon test mule.

I'm interested in getting one.  I'll pm you with a couple of questions.

I just orderred the new improved version, mine comes with free installation by Muddy!!!