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9

A six pack usually refers to the Chrysler (Mopar) carburetor setup which is three-two barrel carbs on an intake. You'll most often hear of it as a 440 Six Pack, the 440 referring to the Big Block Mopar engine displacing 440 cubic inches. Here is an image of such a setup: The interesting thing about these is they are setup sequentially, where the main ...


8

Gasoline is made in large batches. Each batch has a number of attributes that should be met; Octane, specific chemistry, volatility, contaminates, ethanol content, and others. The output is dependent on the crude that went into the refinery and the processes the refiner has at hand to process it. Refineries vary in there capabilities. There are over 60 ...


7

NOTE: The following example assumes output in lb-ft & horsepower. Dynamometers can also measure torque output in Newton Meters or Kilowatts just as easily, or any other measure of torque and power, for that matter. First off, let's get everyone on the same sheet of music. When it comes to vehicles, there are two basic types of dynamometers: engine & ...


7

bit of a braindump... Hard to get more specific without more specific requirements... Is this a drag car, track car, street car, daily driver, etc. Basically this will lead you to - where do you need power and how much do you need. "Speed costs money, how fast do you want to go?" Just about everything is a balance of top end power vs bottom end power. ...


6

Engine Remap One way of increasing the power from your engine, depending on the car is to get your engine "remapped". This effectively means that your cars on-board computer (or ECU) has had its software changed and as a result the engine is told to produce more power. It should also be noted that changing the software used by the car can also be referred ...


5

A cam... in its most generic sense converts rotary motion into linear motion or vice versa using solid egg-shaped actuators (lobes)¹. An engine camshaft... refers to the shaft which houses a series of cams that actuate the opening/closing of the intake and exhaust valves on a four-stroke engine. A performance camshaft... is just a camshaft whose ...


4

Upstream the throttle body A dirty intake by itself isn't the problem, but it is a sign of contamination of related components: MAF sensors don't take kindly to dirt This will usually lead to the fouling of the hot-wire(s), resulting in the underreading of air mass flow, which will lead to positive fuel trim correction. If the contamination is bad ...


4

Would there be a substantial enough of a horsepower boost to be noticeable? The most you could see from such a modification is 15hp. This would not be enough for the seat dyno to register, unless there are plenty of hemorrhoids to detect it. More then likely you'd see a measly 5-10hp, and then only at the higher RPM levels would this be apparent. You ...


4

Performance cams have various cam lobe configurations where the valve lift and duration are changed from OEM to provide better efficiency for the combustion process. I would like to make a distinction between efficiency for the combustion process and efficiency of fuel consumption. Combustion efficiency can be related to how much air and fuel can get into ...


4

Iridium spark plugs are not going to give you more performance compared to copper types. You will notice increased performance only if the current plugs are in bad shape to begin with. The advantage of iridium spark plug is that they last a lot longer compared to the copper ones. So you don't have to change plugs that often. So it is up to you to decide if ...


3

First of all blaming your chocking problem fully on the spark plug is not wise there could be tons of other factors which can cause the chocking issue on your bike for example. Bad air filter. Bad fuel pump. Bad fuel itself. Fault with the ECU. Check all of the above components before coming to the conclusion of changing spark plugs. Also spark plugs ...


3

Generally, in the automotive world, there are two different types of dynamometer (or dyno for short) which might be used: chassis dyno; engine dyno. I'll discuss the general procedures for each type of dyno. Every dyno operator has their own procedure and will operate it how they see fit. You have to allow for this mainly because it's their dyno, they paid ...


3

Offset is one of a number of measurements applicable to a road wheel and it describes the distance from the centre line of the wheel which the mounting face of the hub is. As a practical example, lets consider a 6J wheel (a wheel which is 6 inches wide). Offset is usually quoted as "ET" followed by an optional mathematical sign (+/-) and a number. A wheel ...


3

Torque in a motorcycle The piston moves up and down, and the force for that comes from the fuel that is burned. Connected to the piston is a rod, the connecting rod, and that rod is connected (with the ability to turn) to the crankshaft. The distance between the pedal to the rotation point is comparable to the distance between the crank and the middle ...


2

The only thing that will make a big difference on an economy car motor (ie, more than a placebo effect) in terms of acceleration is forced induction. Having been down this road myself, I feel I should warn you now: once you start doing serious modifications, you're going to be maintaining your car a lot more. Get a spare car. best route is probably to get ...


2

The short answer is no. The engine is most efficient at the RPM when maximum torque is achieved. It's easiest to explain with a picture. Power is a function of torque and RPM. Maximum torque is achieved because the engine is able to move the maximum amount of air and fuel in and out of the engine. The power continues to climb even when the torque starts ...


2

As far as I understand it, the 'premium' brands will have the fuel mixed to their own specifications, which may include particular detergents, additives etc. The cheaper brands will simply buy whatever is cheapest - so the Tesco one could be identical to Shell one week (if Shell happened to have a surplus), BP the next, a mixture of things the week after, ...


2

Some throttle lag is normal on electronic throttle equipped engines. Most drivers do not notice it. But those who do often ask why. The lag strategy is done so that the fuel control system can stay in closed loop control in an effort to keep the fuel mixture at stoichiometric during acceleration. Older systems designed for the less stringent emission limits ...


2

It depends why you are comparing them. If you are playing top trumps in the pub then BHP (PS) is a good measure of an engines peak output. However, this doesn't tell the whole story. Power to weight ratio is a good measure of how an actual vehicle will perform but again, it doesn't tell the whole story. Essentially, if you are looking to compare just one ...


1

I don't think the engine size is as much a factor as the geometry for a new rider. Of course mentality is the most critical. Geometry is function of the type of riding. If this is in a city with congested roads I'd opt for something more upright with better visibility. Back then you could get trail bikes and ride them on the road, and they were very easy ...


1

No, the engine speed at which maximum fuel efficiency is obtained is different. In fact, the faster you go in any given gear the worse the resultant fuel economy will be because it takes increasingly more power to overcome the vehicle's drag forces. It worsens because the power required to overcome drag forces on a vehicle at a constant speed is ...


1

Whilst technically a car has more power in colder air because the relative density of colder air is greater and therefore contains more oxygen than warm air, it should not cause the behavior you describe. It sounds to me like one of the sensors your ECU uses is faulty. My first port of call would be to have a diagnostic scan done which will pinpoint any ...


1

The lower ride height does have a lot of advantages aside from appearance. For one, the lower a car is, the more aerodynamic it is. Another thing that's great about a lower car is that because you need stiffer springs to compensate for the smaller amount of travel they can do over bumps, your car is kept more level when you go around corners. This minimizes ...


1

Did you know that changing your Oxygen (o2) Sensor could improve your gas mileage? Poor gas mileage could be an indication that you will need to check on your o2 sensor soon. And don't forget the faithful periodic "Tune Up"..W/ a new fuel filter installation.


1

The two things are entirely unrelated: 1 - this is normal. When you press the accelerator, there are a number of things that have to happen - more fuel to the cylinders, spark timing change, valve timing changes etc. and this takes some time to have an effect. If you had a turbocharged car you would notice a much greater lag, as there is a huge dependency ...


1

Well most of the car owners prefer alloy wheels because they offer both cosmetic and performance. However, I think alloy and steel both have their own significant points. Quality of an alloy wheels depends on the amount of Nickel added with aluminum in its making, whereas steel wheels are known as “unsprung weight” as they are not cushioned by suspension ...



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