The high flow Mr gasket thermostat 4364 should work on hummer h3 3.7 motor if you use dodge Dokota steel thermostat housing 902-318 ($19.99.+$9.99) grind 1/8 inch housing holes add stiffing washers should work perfect. Get away from restrictive oem thermostat. Will post pictures of parts and assembly plus satisfieing result.

 

Waste of money!
Last time I checked, the LLR is NOT a high performance engine.
Diagnose the source, causing your high engine temp.

 

$30.00 to remove a source of GM misengineering forcing you to use what they think is best by using integrated thermostat. Truck is fathers 40,000 original miles no overheating just want to correct design flaw. Like greasing hub bearings Thu abs sensor holes. Father was Buick mechanic enjoy fixing kinks lol.

 

110yrs of GM engineering. Now you think you can correct the thermostat? LMFAO
You will lose more money in the long run with loss off fuel economy and engine carbon deposit buildup.
I know my thermostat works perfectly, great fuel economy, and the engine purrs like a kitten, smooth as glass.

If you perpetually have an engine running cold, it will be stuck in lean mode, causing damaging side effects. These are all caused by an overly rich fuel mixture and include poor fuel economy, carbon buildup, and in extreme cases the raw gasoline in the exhaust stream can foul a catalytic converter & O2s.

 

have 180 thermostat in it already from factory putting 180 back just want more flow thru that pipe Mr gasket out flows gmc thermostat easy. The stock one is just a problem waiting to happen. Have external trans cooler with no connection to brand new radiator at all no chance of cross leakage. Brutal ARB bumper in front to squash bugs also. My own Tech 2 to look into the pcm whenever needed which is more than once in a while. 😁 Learning from others problems so my truck can live a little longer. Tech 2 shows trans temp is now cooler than water temp so all's well.😁 burned all five coils at once by using non resistor plugs, THAT WAS A LEARNING EXPERIENCE. True there is do's and don'ts to hummers. Are we having fun yet?😆

 

Also I removed the big induction box on top of motor in faver of fiberglass pipe with pcv fitting to connection in middle. Can see my new coils now. No gains other than know throttle body gets straight air from filter with no chamber. Stock filter. Going to put electric fan on next with baffle to send all heated air from radiator out bottom of truck instead of at motor.

 

Thinking it through maybe a fail-safe 180 thermostat would be better with dokota housing on my hummer h3 I 5 this way never have to worry if it fails. Going to put a radiator filter in upper hose to grab any garbage in system too. The clear type you can see into.

[QUOTE=JoeIrvintonNJ;363089]Also I removed the big induction box on top of motor in faver of fiberglass pipe with pcv fitting to connection in middle. Can see my new coils now. No gains other than know throttle body gets straight air from filter with no chamber. Stock filter. Going to put electric fan on next with baffle to send all heated air from radiator out bottom of truck instead of at motor.[/QUOTE

Thanks your right about baffle there are patented straight through mufflers that use this very concept to suck extra exhaust out of motor wonder if there is one that length? The direction should not change also. Simple math too can make it out of pvc if muffler is not right. Copieing is the greatest compliments. Might net a few ponies using a performance
proven design for racing. Wonder if there is something like this for mustang? Going to look for replacement. New project.

 

You need to stop going under "Fathers" hood, you're destroying his H3!

What Does an Air Intake Resonator Do?

Design and Construction

The resonator itself couldn't be simpler in design; it's basically just an expansion chamber or wide spot in the otherwise-smooth intake pipe. It may or may not contain some kind of baffle or plate, depending upon the design and the intent of the designers. Resonators come in two types: In-line resonators are open chambers that sit in the intake tube, while side-branch resonators are chambers that sit next to the tube and are connected to it via a small duct or channel.

The Common Misconception

Most hot-rodders and car enthusiasts think of intake resonators as simple mufflers in the intake tube, devices designed to siphon all the awesomeness out of a car's sound track to appease soccer moms and senior citizens. That makes it a prime candidate for the "chuck-it" school of auto modification. After all, it's basically just a plastic tumor growing off of a tube that should by definition be as smooth and blemish free as possible. While sound control is indeed part of the resonator's job, the sound control itself is really more of a side effect of its primary purpose.

Pressure Wave Harmonics

Air flowing into your cylinder head's intake port doesn't move in a straight line while the valve is open, then politely stop in its tracks to await another valve opening. When the valve closes, the moving column of air slams into it, then compresses and bounces back like a spring. This pressure wave travels backward at the speed of sound until the intake runner opens up or it hits something, and then it bounces back toward the cylinder. This is the "first harmonic." The pressure wave actually bounces back and forth two or three more times before the intake valve opens again.

Intake Tube Pulses

The resonator in your intake is technically known as a Helmholz resonator, an acoustic device used to control pressure wave harmonics. Air bouncing back out of your engine and into the intake tube doesn't do it in a single pulse the way it would in a single intake runner; the multiple pistons put out pressure waves at their own intervals, and some of those are going to try to bounce back in while others are going out. The result is a "clog" or high pressure area in your intake tube that ultimately limits airflow through almost the entire rpm spectrum.

The Resonator

Adding an expansion chamber to the intake tube forces air coming back out of the engine to slow down to fill the cavity, thus expending a great deal of its energy and slowing the pressure wave reversion. This slowdown allows fresh air to flow toward the engine without fighting pressure reversion waves the entire way, thus aiding in cylinder filling. Since these pressure waves are essentially sound, giving them a place to expend their energy before exiting the air filter box ends up dampening the intake noise and quieting the engine. Thus, the resonator helps to make the engine paradoxically quieter and more powerful.



https://www.brighthubengineering.com...ic-efficiency/

 

[QUOTE=JoeIrvintonNJ;363114]Seriously, you need to stay away from your father's H3!!!!!! You need to concentrate on getting your high school diploma, instead of posting bs on this forum.

 

OH GOD another new guy who thinks he can reinvent the wheel because he went to a tech school.
Here we go again...