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High Performance

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High Performance
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You may have heard the term "jetting" before and wondered what it meant. Jetting is the act of adjusting the separate fuel circuits in a carburetor to optimize the fuel/air mixture going into the engine. To the untrained person jetting can come across as being very complicated and some people fear the process. Once you understand which circuits control what part of the throttle cycle, you will learn that jetting isn't at all that difficult. The following will describe what each circuit does and how to adjust that circuit for optimum performance. This assumes that you have a Keihin FCR type carburetor (the information translates to other carburetors as well) which is found on almost every modern high performance four stroke ATV engine.

Fuel screw: Adjusts the "hang up" of the engine when you go from wide open to idle quickly. If your engine doesn't smoothly idle back down or "hangs up" when you let off the throttle you need to adjust the fuel screw out (richer) to clean this up. If your engine idles down and then dies you need to turn the screw in (leaner) to allow less gas into the engine. Play around with the screw until your engine idles down smoothly.

Pilot jet: Controls 0 to 1/4 throttle. This jet requires the least amount of adjusting over the rest. If your engine cuts out when you rev it up then you need to make this richer (higher number) if it bogs when you rev it up you need to make this leaner (lower number).

Needle jet: Controls 1/4 to 3/4 throttle. You can tell the most when this is out of tune when you do holeshots. If your engine is bogging when you dump the clutch on a holeshot or you are riding at a constant 1/2 throttle and you engine is bogging then you need to move the c-clip up one notch (drops the needle making it leaner). If the engine is cutting out in these situations you need to move the c-clip down one notch (raises the needle making it richer). Setting the c-clip in the middle slot is a good place to start.

Main jet: Controls 3/4 to full throttle and also affects all other jets slightly. This circuit is tested when you hold the throttle wide open. If your engine is bogging the you need to make the jet leaner (lower number) and if it is pinging or cutting out you need to make it richer (higher number).

Jetting can be very touchy and tedious. At any rate your engine should rev at a constant RPM at any throttle position and should rev up and idle down with no hesitations. Once you start getting your hands dirty and listening to your engine you will become an expert at jetting. Hope this helped and good luck!

Rob Shoemaker is an experienced ATV racer and mechanic. He invites you to visit http://www.igoatv.com where he has published numerous articles on ATV safety, maintenance, riding, racing and much more. You will also find a video section with high performance ATV racing and riding featuring some of the top pro's of this era. To gain more knowledge about ATV riding and racing go to: http://www.igoatv.com

Make Your Car Faster and Meaner With High Performance Car Parts

If you are a car enthusiast, you will know that in order to really have a super terrific car; you need to have high performance parts. Stock items are dandy and all, but if you are looking for real horsepower and torque; electing to install high performance parts in place of regular stock parts is a must. Not only will you have a faster and stronger car, high performance parts will make your automobile sound tougher and quicker as well.

There are numerous different items that can be considered high performance parts. In all reality, any alteration done to an automobile can be considered a move to enhance performance. Many of you maybe scratching your head after hearing this statement, but truth is; any part of a car can be changed in order to boost performance. The rims of a car can be changed, the doors of a car can be shaven, and a number of other changes can be made in order to give you car a better feel and look. This only means that all these parts and changes can really be considered high performance parts.

As previously mentioned, almost every part one alters on their car can be considered a high performance part upgrade. The most common upgrades however, include intake replacement, exhaust, turbo and super chargers, and chassis. All theses things are great and can be considered high performance parts. If one is looking for high performance car parts, you can easily look and find them online. Make sure to purchase high performance parts and not just aftermarket items. There is a difference for those knuckleheads that don’t think so. If you are looking to make your car super fast while also making it sound mean and deep, get your little paws on high performance car parts.

About the Author

Written by Charlene Frederikson. Find the latest information on High Performance Car Part

Does Hard disk size really matters if I were to build a high performance computer?

I am goiing to make a highly performance computer so before making it I thought to ask a question that is making me confuse. Does Hard disk size really matters if I were to build a high performance computer?

No. The speed of the HD is more important. SSD (solid state drives) would do better than a 5400 RPM HD because, obviously, you can access your data at a faster rate.

On top of that, the system bus (data pathway) needs to be fast as well to keep the hungry processor fed with data.

So, going with a system that utilizes a motherboard with a maximum front side bus speed of 400 MHz would not equal a high performance system, compared with that utilize 1066 or higher.

The new Intel X58 chipsets utilize QPI which works differently than the previous bus technology. It also has much faster throughput as well.

IBM and NTU announce collaborative effort to converge cloud computing and high performance computing
( Nanyang Technological University ) Leveraging its High Performance Computing Centre, one of ASEAN's fastest and greenest supercomputer to-date, NTU will work with IBM to combine the strengths of cloud computing and HPC to further reinforce Singapore's position as a vibrant, global R & D hub engaged with innovative technologies and applied research relevant to industry adoption.

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