Cars and engines are no different. Just because you may have a powerful engine doesn't mean you'll be "quick" or will accelerate quickly if you don't have gears low enough. Race cars don't run super low gears for no reason. Even with VERY powerful engines, without the gearing, an 8 second drag car can instantly become an 11 second car. On a 10 speed bike, do you have troubles figuring out which gear to change to as you go faster or slower?
Car gearing is no different once you know the info and what to take into consideration. They take the whole picture, the car, engine, gearing, driving style, etc into consideration so the car can perform as it is intended. To make a point, if you took a bone stock V-8 car with say, - HP and put 4. A car's performance isn't solely related to just the engine's power.
Gearing is every bit as important if you want it to go like it's supposed to. When I was younger and was the "John Milner" of my town with the quickest car in the valley, a lot of people thought it was because I had such a bad ass engine in my car.
Indeed for a small block it WAS a bad ass little engine, BUT what most people didn't know was hiding in my rear-end was a set of 4. Without those I wouldn't have had a 10 second street car, it probably would have been more like a 12 or 13 second car. For the best deals on your performance parts and accessories with the best service, choose where I order all of my components from Competition Products!
In general, a lower final drive ratio will lead to less torque at the wheels but a higher top speed. Meanwhile, a higher ratio will result in the opposite, i.
A lower taller gear ratio provides a higher top speed, and a higher shorter gear ratio provides faster acceleration. Besides the gears in the transmission, there is also a gear in the rear differential.
These both vary by fuel mileage consumption so choose wisely. Rear end gears 2. Shorter gears higher numbers are much better suited for accelerating, such as 3. For instance, a gets better fuel economy than a On the other hand, a or perhaps a will tow much more, while fuel economy greatly drops.
The most popular rear end ratio in trucks today is the , which sort of averages towing power and fuel economy. FACT: A 3.
If you plan on towing a fifth-wheel trailer or anything heavier than 5, pounds, you should consider a 4. You can change the axle ratio, and you can do it rather easily. Quite a few members here have gone from one ratio to the next. People with 3. But if you are towing the majority of the time, you probably want the 3. For example, a truck equipped with 3. Those ratios provide very good acceleration with gas V-8s and diesels.
As to cost, depending on where it is done, it could cost you as little as dollars to as much as dollars per axle. Best prices would probably be a performance shop that does it all the time. For street and strip applications, a popular choice ranges between 3.
The conventional procedure for selecting gear ratios is to pick ratios that run the engine rpm to redline at the end of the medium and longest straights, and pick the lower gear ratios to minimize the rev drop at each shift.
This method minimizes the number of shifts per lap. As with the transmission, changing the axle ratio changes vehicle performance. The advantages include improved fuel efficiency in stop-and-go traffic and off the beaten path; more space for larger engine components such as air intake systems; and better drivability on slippery surfaces like snow or sand.
Because 4. I would rather have a 4. I want the best possible fuel efficiency for my vehicle, but not at the sacrifice of acceleration.
If I had a vehicle with smaller engines like an SUV or minivan, then I would probably try to get the most efficient gearbox or transmission possible.
The transmission and differential that work best with these gears would be lighter weight than originals installed on vehicles with 4. For example, Chrysler V-6s are equipped with 3. I would also like it if I could install a slightly smaller size gear set for better fuel efficiency out of my engine bay, but it might be difficult to find a 4. Installing 4. However, it is better to have 4.
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