Intake Manifold For 92 Stealth
Posted in Air Intakes System | Asked on Dec 10, 2011
I have a 92 dodge stealth 3.0L v6 base. and i have been researching ways to speed it up a little bit. im starting with the basics like exhaust system and cold air intake i believe, then i came across this question about the intake manifold can help you gain hp by helping the air flow better. so my question is what kind of intake should i get?
There are 4 Answers for "Intake Manifold For 92 Stealth"
I realize this is a hotly debated topic, but in my experience, the manufacturer’s intake that was specifically engineered / designed for your car is the best.
The basic problem arises when you start making changes to the air intake, you also cause the computer to attempt to adapt to the new intake system, altered airflow and temperature of incoming air.
You’ll frequently have problems with your sensors when changing air intakes from stock to the after market intakes, and usually the only “positive” that results is the sound of the air intake.
Performance is very rarely affected in a positive way by using an after market air intake since the computer will attempt to restore the original settings based on the original intake system for which it was programmed.
Don’t waste your money on this kind of stuff, spend it on on the babes.
Don’t expect any real performance improvements from a cold air intake. They are just eye candy. Just a gimmick to sell you a fancy air cleaner that you don’t really need. They may possibly flow air a little better, but no gains are from cold air. Here’s why.
First, you need to think of your engine as an air pump. If your 3.0 liter engine had the perfect cylinder heads, perfect camshafts, largest possible valves, perfect intake manifold, at 5500 RPM when it makes its maximum power, theoretically it can only flow about 291 CFM of air. I doubt you have these perfect engine components, so the engine flows considerably less, as much as 25% less. Realistically your engine flows more like 270 CFM. It’s not as though you are feeding a big block V8 with a big Holley carburetor. So how much airflow do you really need? In addition, believe it or not, the factory engineers designed your stock air intake including the stock air filter to supply the engine with more than enough air. If the factory engineers wanted to restrict airflow for some strange reason, they would have simply installed a smaller throttle body.
Next, you need to examine the throttle body and the tube that connects it to the air filter housing. I will use my car as an example. The engine is a common multi port fuel injected, 3.1 liter V6. On this engine, if you measure the diameter of the throttle plate, it is 2.205 inches (56 millimeters). If you measure the diameter if the stock pipe that connects the throttle body to the air filter housing, it is 3 inches, (76 millimeters). Since the stock pipe connecting the throttle body to the air filter is already nearly 50% larger than the throttle plate, adding an even larger pipe will not flow any more air than can already pass through the throttle bore. No real improvements here unless you also add a larger throttle body and enlarge the throttle opening in the intake manifold.
NOTE: The stock 56mm throttle body on my 3.1 flows 345 CFM that is already much more air than this engine can use. Adding a larger throttle body would give absolutely no improvements to my engine.
If you examine the stock air filter housing you will see that it draws its air from an opening in the radiator core support, drawing air from in front of the engine compartment. This air is already relatively cool. No gains found here.
The name “Cold Air Intake” is very misleading. On a cold air intake, even if it has some kind of intercooler, it will NOT cool the air any cooler than the ambient outside air temperature. Also, consider that the air passes quickly between the air filter and the throttle body, too quickly to absorb any significant amount of heat. With a V8 engine, you gain about 1 horsepower for every 10 degrees Fahrenheit drop in temperature. Therefore, even if you could drop the incoming air 50 degrees, you gain a measly 5 horsepower. These gains are proportionately less on smaller 4 or 6 cylinder engines. Therefore, they are hardly worth the expense.
Another thing to consider is that your engine is equipped with an EGR (Exhaust Gas Recirculation) valve. This device dumps between 5% to 15% hot exhaust gas from the exhaust manifold directly into the intake manifold. This exhaust gas is over 1200 degrees F. A cold air intake can’t make a difference over this extremely hot gas. Your engine is tuned to operate with this so it is not a problem.
The air filter used in the cold air intake is the only component that may give you any real improvement. In general these air filters will flow a little more air than the stock paper disposable element, but only if they are routinely cleaned and oiled. If they are allowed to get dirty, they will work no better than the stock paper air filter. However, with a late model fuel injected engine, avoid the ones that use the washable oiled gauze elements. If even the slightest amount of oil from the filter gets on your Mass Airflow Sensor, it will foul the sensor. This sensor is located in the tube between the throttle body and the air filter housing. If fouled, it will send erratic signals to the engine management computer. This will mess up your fuel / air mixture to the point that you could have even less power than you had before you added this component. If you already have one of these types of oiled air filter elements, you should clean the Mass Airflow Sensor with the correct cleaner every few months. Use Mass Airflow Sensor cleaner, and not carburetor cleaner, or you will destroy the sensor. Instead of the cold air intake, I would just simply add a low restriction air filter element.
With these higher flowing air filters, you don’t notice anything until the engine is in the higher RPM range. No real noticeable difference in normal driving. Your engine when cruising at highway speed only needs about 85 CFM.
Personally, I hate washing and oiling air filters. A messy job. I would stay with the disposable paper air filter for this reason.
Its a supply and demand thing! If you can find a: World Products, Brodex, Edelbrock, Typhoon, Dart, Holley or Weiand intake manifold DONT BUY IT! You’ll be a sad fellow if you do. You will not get one aunt-hill’s worth of a horsepower gain.
It sounds as if you enjoy throwing money if you buy ANOTHER cold air intake. Your car already has one.
Why would you want to put money on a dodge stealth unless you are a lady its,a ladys car retired nurses , teachers, good for steady pensioners to maintain a crappy car with expensive parts no offense its the car good luck