It’s your truck man, do what you want. We are just along for the ride.

The hole that you cut in the diverter is part of the precleaner. It is supposed to get the air swirling and the centrifugal force cause the dirt to separate. What will happen with your setup is that you will get a hole in the filter element over time, because you will sand blast it with dirt and moisture. Also, the fording hummer bypasses the drop box by adding a rubber elbow inside. Your hummer is not made for fording.

So maybe you should have looked at the h1 a little bit before doing all this. In the h1 there is no deflector in the snorkel box, it has a 90deg. Silicon elbow. And they have a k&n style air filter. They did all of that so the dmax could flow the proper amount of air.

Did I hear you correctly (if not I completely wasted a lot of time here lol).....you put in a V8 LS gas engine in there? I'll say this as nice as possible with regards to you saying that there wasn't a very noticeable power difference.....Do you understand how gas and diesel engines are different from each other and how the application of any engine is of utmost importance to understand? For starters, HMMWv's weigh over 5,500 lbs (depending on the variant you have). Lecture time: You need something with high torque, because torque is the actual force that gets a vehicle moving forward. Horsepower is how "fast" that work is done. This is where "application" comes in....when I was a teen till my mid 20's, I was really into trucks. At some point 2 wheel drives and other times 4x4's. My last truck was a 70 Chevy and I put a Mark-5 (I think '94) 454 big block in it with a turbo 400 transmission. Obviously I was looking to go fast, but what I soon learned was that no matter what I did, a car was going to be faster (for many reasons). Trying to make a truck go extra fast turned out to be a retarded thing to try to do. So then I got into cars and not too long later, Audi's (which I still have 1 now). My point to all of this is "are you really just trying to make your HMWWV fast"? To me, logic dictates that's a complete waste of time, energy and money. Back to the issue you had of not much power difference.....Well duh, of course not! You have 400HP now compared to under 200HP with the HMMWV, but what's the torque output of the LS? Secondly, the diesel engine is putting out it's max torque at like 1,500RPM and around 300ft-lbs (if it's the N/A 6.5L). Where is the LS putting out more than 300 ft-lbs and what's the RPM.....basically what's the torque and HP curves look like when put together on a graph? Gas engines normally need to be at a high RPM to get the torque and HP numbers up, and what that translates into in real life is that you gotta be hauling ass all the time to produce those big numbers. Do you really want to constantly drive your HMMWV 100mph+??? To me it seems like you're trying to break a block of cement with a regular hammer. You want to use the regular hammer because you think that swinging it super fast is going to get the job done amazingly....The reality is that for a HMMWV, you want a slow swinging 10lb sledge hammer to break that block. In a light weight Vette that LS will kick ass because the Vette weighs like 40% less or so (just my off the cuff guess). You don't need a ton of torque to get that lightweight car moving. Actually you can totally have too much torque in a car and it will completely work against you. If a Vette has 1000 ft-lbs you are going to lose control of that car and wreck it really quick unless you're The Stig. Ideally you'd want a moderate amount of torque and high HP.....that way it's far more predictable and controllable (unless you have an all wheel drive car, then you can have high HP and torque combined). In a HMMWV you want the opposite.....high torque and low HP. The way when you are off-road you have all the pulling power you'll even need, but with the low HP so you can control it in the off-road environment where speed is actually a bad thing.

At the end we haven't heard how much improvement it made to the engine performance- the design is to create swirling vortices to separate heavy particles which isn't as efficient as straight through flow. I also met a guy two years ago that had changed his HMMMWV's radiator to an Aluminum one saying it is the best cooled HMMWWV in the USA> then what? what is the practical gain?

Your humvee doesn't have a deep water forgoing kit its only rated to 30 inches

Remember sometimes more motor is not good. Example my uncle had a Toyota TRUCK put in 350 4 bolt main in it he kept stripping rear end gears even properly shimmed bad ass gears tore them up too. Maybe it was the nos but even without the nos same shit. Certain thing are built for reliability and over power wear out shit or just kills it lol

Very interesting mod.

If you trimmed the snorkel tube like you plan but leave enough left to get a hose clamp around it you could get a sheet of “outerwear “ like a fine mesh pre filter designed to repel dust and water for off-road intakes. Just if you some how didn’t know. And that would probably do much the same thing that the stock plate was there for, and it should effect airflow minimally to not at all. I bet water and larger dirt particles would loose velocity and gravity would take them to the drain. In case of water and some dirt but most dirt would just get stuck on the outside of the prefilter. There like $20 off amazon or something. Will also keep your air filter better for longer saving money. Or if it’s a cleanable filter save you the hassle of picking out big bug guts and trying not to damage the filter while doing so and then actually having to do it more often. The outerwear can just be cleaned in a sink usually even without a little dish soap but I do usually use a little just because it’s always there. Heck even a water bottle poured the reverse of air flow would be just fine and hose clamp back on

Did this make a noticeable difference in the performance of your HMMWV?

Do you think cutting the airbox like you did, would be beneficial for a non turbo stock 6.5 Diesel in mine?

Matt, Matt, Matt... You can't do this to your beloved HMMWV... ... 'cause... um... Yeah... I got nothin'. Carry on! Looks like it is going to be badass, btw. :)

My headlight keep burning out just one the other one stays on anyone else has had that issue

So as I was saying. If you inject more Fuel W/out More AIR it Can't Burn the Fuel. U must have the Ratio Right or like the old Trucks use to SMOKE = U see Black Smoke is Unburnt Diesel.! So as I use to grab the Next Gear Pulling 80 Thousand PDS up a hill the old Mack's Would SMOKE BLK SMOKE Until the R.P.M.s Caught Up. Then the Air Ratio would be Corrected. ! I Hope this helps Explain. Better. But No my Friend Get that Hole Fixed & get You A Turbo For That Engine... Then it will have Air Pressure in the Air intake & as the Value Opens Air= Oxigen is Forced into the Chamber & NOTICEABLE POWER COMES NEXT...

Do u have a video on replacing water pump pleese

What about adding a 24v 3" fan into the ABS extension for the air cover to force air through the system?

Matt, like you I will never go that deep in the water, did it make a difference, do you think with the original diesel engine that you would gain something, where did you get the 4' riser for the air cap and does the K&N also make a big difference, did you use K&N #: E-1700. Thnaks

Great information! Thanks for sharing :-)

I'd like you let us in on the air filter you are now using, thanks

Wonder if I do this on mine if the 6.5 na diesel would perform better?

SO... WHAT HAPPENED? DID IT WORK? MOR HP?? FASTER? POWERFULL? OR FAIL?

Hy guys.what is the ideal tempereture after reapleacing the lsx engine?

Either get you parkinson's under control, or get a tripod...

You probably weren’t seeing a big difference in power because it’s an over 7000 pound vehicle and you took the diesel engine out of it. They weren’t really geared to go fast

Torque is what moves a Hummer, brother, HP is a function of speed, i.e. RPM.

THE PROBLEM IS YOU ARE WRONG,,,, YOU RUIND THE PRECLEANER DONTS YOU GET IT??

You didn't feel much difference in power because the diesel had a lot of torque. You only feel the difference in power up there close to the top speed. Low speed is all torque.

Cut it all out and put in a KNA filter

What kind of torque is that LS putting out?

What do you mean "I don't know how much HP I will lose through the drive train", what's the issue with it? I'm looking to get one.

How can I find out how to put a gas engine in my m998

what motor mounts did you use?

Can I do it to my 6.2l 1993.

9lbs = 6 pounds of dirt in it.

Good instructive video thx for sharing

how much are hummers?

good idea

I guess That's the reason why fuel Economy sucks plus paper filter just get straight pipe intake and a long snorkel

Just junk the whole concept and run a snorkel above the cab. kzfaq.info/get/bejne/oNhzl7V60afIYps.html

do you realy think you smarter then the guy that build the humvie??? dont touch anything man

Why an ls?

nice - should breath easier now!!

Owns a hummer and uses harbor freight socket set smh!