Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Redline shopping experience:
1. Compare - without doubt the biggest advantage that the Redline offers shoppers today is the ability to compare thousands of Redline at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.
2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about
3. Testimonials - don't know anybody that has bought a Redline? Wrong! If the Redline is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.
4. Questions - Got a question about Redline then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....
5. Reputation - Never heard of the company selling Redline? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Redline and build up a picture of their reputation for sales, returns, customer service, delivery etc.
6. Returns - still worried that even after all of the above your Redline wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.
7. Feedback - happy with your Redline then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.
8. Security - check for the yellow padlock on the Redline site before you buy, and the s after http:/ /i.e. https:// = a secure site
9. Contact - got a question about Redline, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.
10. Payment - ready to pay for your Redline, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.
This article discusses the term "redline" as it applies to internal combustion engine technology. For other uses of the term, see Redline (disambiguation).
Redline refers to the maximum engine speed at which an internal combustion engine or
traction motor and its components are designed to operate without causing damage to the components themselves or other parts of the engine. The redline of an engine depends on various factors such as
Stroke (engines), mass of the components, Engine displacement, composition of components, and balance of components.
Engines with short strokes can handle higher rpm because there is less force in reciprocating engine. Lighter components can increase the redline as well, since they have less
inertia and decrease forces present in the engine.
Redlines vary anywhere from a few hundred
revolutions per minute (rpm) (in very large engines such as those in trains and generators) to more than ten thousand rpm (in smaller, usually high-performance engines such as motorcycles and sports cars with
pistonless rotary engines).
Diesel engines normally have lower redlines than comparatively-sized
gasoline engines, largely because of fuel-atomization limitations. Gasoline automobile engines typically will have a redline at around 5500 to 7000 rpm. The
VTEC engine in the '00-'03
Honda S2000 had the highest production car redline at 9000 rpm. The Mazda Wankel engine#Renesis rotary engine in the current
Mazda RX-8 also has a redline of 9000 rpm; although such engines can run at much higher speeds, this does not hold for the ancillary components and gearbox. On the other hand, especially during the 60s and 70s, American engines used to have redlines as low as the 5000 rpm, mostly due to the use of valve pushrods that can warp or snap at higher engine speeds.
Motorcycle engines can have even higher redlines because of their comparatively lower reciprocating mass. For example, the Yamaha YZF-R6 has a redline of about 16200 rpm. Higher yet is the redline of a modern
Formula One car. Regulations limit the maximum engine rotation to 19,000 rpm, but during the 2006 season, engine speeds reached over 20,000 rpm on the
Cosworth engine.
The actual term
redline comes from the red bars that are displayed on
tachometers in cars starting at the rpm that denotes the redline for the specific engine. Operating an engine in this area is known as
redlining. Straying into this area usually does not mean instant engine failure, but may increase the chances of damaging the engine.
Most modern cars have computer systems that prevent the engine from straying too far into the redline by cutting fuel flow to the Fuel injections/carburetor or by disabling the ignition system until the engine drops to a safer operating speed. Most
Electronic Control Units (ECUs) of
automatic transmission cars will upshift before the engine hits the redline even with maximum acceleration (an automatic transmission sport car's ECU will allow the engine to go nearer the redline or hit the redline before upshifting). If manual override is used, the engine will go past redline for a brief amount of time before the ECU will auto-upshift. When the car is in top gear and the engine is in redline (due to high speed), the ECU will cut fuel to the engine, forcing it to decelerate until the engine begins operating below the
redline at which point it will release fuel back to the engine, allowing it to speed operate once again.
However, even with these electronic protection systems, a car is not prevented from redlining through inadvertent gear engagement. If a driver accidentally selects a lower gear when trying to shift up, the engine will be forced to rapidly rev-up to match the speed of the drivetrain. If this happens while the engine was at high rpms, it may dramatically exceed the redline. For example, if the operator is driving close to redline in 3rd gear and attempts to shift to 4th gear but unintentionally puts the car in 2nd by mistake, the transmission will be spinning much faster than the engine, and when the clutch is released the engine’s rpm will increase rapidly. This problem is not typically associated with automatic transmissions due to the lack of driver control over the shifting process.
This article discusses the term "redline" as it applies to internal combustion engine technology. For other uses of the term, see Redline (disambiguation).
Redline refers to the maximum engine speed at which an
internal combustion engine or traction motor and its components are designed to operate without causing damage to the components themselves or other parts of the engine. The redline of an engine depends on various factors such as
Stroke (engines), mass of the components, Engine displacement, composition of components, and balance of components.
Engines with short strokes can handle higher rpm because there is less force in reciprocating engine. Lighter components can increase the redline as well, since they have less inertia and decrease forces present in the engine.
Redlines vary anywhere from a few hundred
revolutions per minute (rpm) (in very large engines such as those in trains and generators) to more than ten thousand rpm (in smaller, usually high-performance engines such as motorcycles and sports cars with pistonless rotary engines). Diesel engines normally have lower redlines than comparatively-sized gasoline engines, largely because of fuel-atomization limitations. Gasoline automobile engines typically will have a redline at around 5500 to 7000 rpm. The VTEC engine in the '00-'03 Honda S2000 had the highest production car redline at 9000 rpm. The
Mazda Wankel engine#Renesis rotary engine in the current
Mazda RX-8 also has a redline of 9000 rpm; although such engines can run at much higher speeds, this does not hold for the ancillary components and gearbox. On the other hand, especially during the 60s and 70s, American engines used to have redlines as low as the 5000 rpm, mostly due to the use of valve pushrods that can warp or snap at higher engine speeds.
Motorcycle engines can have even higher redlines because of their comparatively lower reciprocating mass. For example, the Yamaha YZF-R6 has a redline of about 16200 rpm. Higher yet is the redline of a modern Formula One car. Regulations limit the maximum engine rotation to 19,000 rpm, but during the 2006 season, engine speeds reached over 20,000 rpm on the Cosworth engine.
The actual term
redline comes from the red bars that are displayed on tachometers in cars starting at the rpm that denotes the redline for the specific engine. Operating an engine in this area is known as
redlining. Straying into this area usually does not mean instant engine failure, but may increase the chances of damaging the engine.
Most modern cars have computer systems that prevent the engine from straying too far into the redline by cutting fuel flow to the Fuel injections/carburetor or by disabling the ignition system until the engine drops to a safer operating speed. Most
Electronic Control Units (ECUs) of automatic transmission cars will upshift before the engine hits the redline even with maximum
acceleration (an automatic transmission sport car's ECU will allow the engine to go nearer the redline or hit the redline before upshifting). If
manual override is used, the engine will go past redline for a brief amount of time before the ECU will auto-upshift. When the car is in top gear and the engine is in redline (due to high speed), the ECU will cut fuel to the engine, forcing it to decelerate until the engine begins operating below the
redline at which point it will release fuel back to the engine, allowing it to speed operate once again.
However, even with these electronic protection systems, a car is not prevented from redlining through inadvertent gear engagement. If a driver accidentally selects a lower gear when trying to shift up, the engine will be forced to rapidly rev-up to match the speed of the drivetrain. If this happens while the engine was at high rpms, it may dramatically exceed the redline. For example, if the operator is driving close to redline in 3rd gear and attempts to shift to 4th gear but unintentionally puts the car in 2nd by mistake, the transmission will be spinning much faster than the engine, and when the clutch is released the engine’s rpm will increase rapidly. This problem is not typically associated with automatic transmissions due to the lack of driver control over the shifting process.
