Intake Manifold

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Intake Manifold
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Speed Density and Mass Air Flow are two different systems used by Ford to help an engines computer regulate the amount of Fuel and timing adjustments the engine will require in order to run effectively and efficiently. In very simple terms, I'm going to attempt to explain how each one works and what you should do if you own a vehicle with one of these systems.

Ford came out with Speed Density first, and basically an engineer sat down and wrote a program based on the current data he had on hand, as in engine size, design, and what ever other variables where involved with that engine and that vehicle operating program is pretty much set in stone. When you turn the key on, and start a vehicle with this system, you will get the same result each and every time. The room for varying any parameters if very minuscule.

Ford eventually got a bit wiser and switched over to Mass Air Flow. Mass Air Flow (MAF) is very different in the sense that it has a meter in the air induction tubing that measures the volume of air ( the Mass of Air Flowing over a meter that calculates the volume of air flowing past it) going into the engine and based on that volume, it makes instantaneous decisions about how much fuel to add and where the ignition timing should be.

Based on these simple facts, when you start to modify an engine in a car with a Speed Density system, you are going to in fact make the engine run more poorly, even though you may have done some exhaust upgrades or installed a better flowing intake or bigger cam, because that computer is programmed to run according to its original engine design, and it will never recognize all the upgrades you have done. Basically, if you want your Speed Density Vehicle to run to the best of its ability, don't do anything but change the oil and filters, that is if you choose to leave it Speed Density.

On the other hand, with a MAF equipped system, every modification you make will be instantly recognized and the computer will adjust to the new parameters, based on the additional air flowing into the engine, past the registering meter that is reading the air flow volume.

So you can change your exhaust, or do head work, or put a better flowing intake manifold, and your vehicle will perform better and in many cases, more efficiently. In some cases, you may need to have your actual meter recalibrated, for instance, if you were to put higher flowing fuel injectors in the engine, then you would have to recalibrate the meter based on those new injectors. This can only be done by a professional shop, but it isn't a big deal to do, and doesn't cost a whole lot of money either.

The good news for you Speed Density guys is, there is a conversion kit readily available for most of your vehicles. So you are not stuck leaving that engine stock. If you decide to make any changes or upgrades, you will want to go out of your way to find one of these conversion kits, no matter where you get it from.

Even without doing any modifications, people have reported smoother idle, better drive ability and in some cases, better gas mileage too. Based on these simple facts, it is generally in your best interest as well as your vehicles best interest to make this upgrade, if you still have a Speed Density System commanding your ride.

Eric Stifel is, among other things, a Husband, Father, Brother, Businessman, amateur Website Designer and amateur article writer who has many hobbies and passions. He is also involved with Dunn-Rite Performance which was founded by a good friend of Eric's from back in their high school days. Dunne-Rite Performance is all about anything to do with Ford Performance. One of their specialties is helping Ford Owners convert that antiquated Speed Density System over to Mass Air Flow. Check them out at http://www.dunne-rite.com

The Honda Exhaust Manifolds

Fuel is burned in order to keep your Honda vehicle in motion, and because fuel combustion involves intense chemical reactions, its byproducts need to be efficiently released from the combustion chamber. To facilitate this, exhaust components like the Honda exhaust manifolds are needed. These pipes direct the flow of exhaust gases from the combustion chambers to the exhaust pipe.

Honda was not initially interested in the manufacture of cars. The Japanese-based company started as a provider of basic transportation in the form of bicycles that were attached with engines. Soichiro Honda, the company’s founder, had big plans for the company as evident in the lofty name Honda Research Institute Company Ltd. It wasn’t until in the 1960s when Honda put his knowledge regarding motorcycles into the production of cars. Today, Honda continues that grand legacy, and it shows in the way its every model is a fantastic integration of the most efficient parts. Worthy of such tag is the Honda exhaust manifold, which is mounted on the cylinder head and under the intake manifold. Depending on the type of engine that an automobile uses, multiple Honda exhaust manifolds can be present in a single assembly. A single exhaust manifold is enough for engines with in-line cylinders while V6 and V8 engines need two separate exhaust manifolds—one on each cylinder head.

Honda exhaust manifolds act as the path for exhaust gases to flow from the cylinder head and into the exhaust. It can also serve as a mounting location for other components like for the air injection apparatus or the oxygen sensor. This function of the exhaust manifold depends on the other emissions elements in the car. Constructed from cast iron or tubular steel, Honda exhaust manifolds need to be inspected for leaks once in a while. When leak is detected, replacement must be done immediately or it may affect engine performance. For the most extensive Honda parts catalogue, take a look at our site, and you can surely find the right type for your car.

About the Author

Anthony Fontanelle is a 35-year-old automotive buff who grew up in the Windy City. He does freelance work for an automotive magazine when he is not busy customizing cars in his shop.

Where are the Vacuum ports on an edelbrock intake manifold?

I have an early 90's crate 350 with a basic edelbrock intake manifold on it. I can not for the life of me find the vacuum ports on it so I can hook up my power brake booster that I just installed on my 62 chevy truck

A lot of the time the lines you need would come off the base of the carb. Other times there is a place on the mainifold that will allow you to insert some vacuum fittings in. But usually it's off the bottom of the carb somewhere. You may have to buy a spacer for the carb that has the fittings you need. If it is fuel injected.. the principle is the same. there should be some fittings around the throttle body

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