How do you change gear ratios in drag racing?

How do you set up gear ratios?

The gear ratio is calculated by dividing the output speed by the input speed (i= Ws/ We) or by dividing the number of teeth of the driving gear by the number of teeth of the driven gear (i= Ze/ Zs).

Can you change gear ratios?

Luckily, some tuners, such as Sharkwerks, can alter the transmission’s gear ratios to improve acceleration and shifting frequency. There’s also the axle ratio to consider. As with the transmission, changing the axle ratio changes vehicle performance. A higher ratio means better acceleration, but worse efficiency.

What gear ratio is best for speed?

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.

How do I choose the best gear ratio?

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.

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What is a good street strip gear ratio?

If it’s a daily driver, chances are you’ll want to keep your gear ratio at 3.23 or below for optimal performance and lower cruising RPMs. For street and strip applications, a popular choice ranges between 3.42s and 3.90s, giving you that extra oomph on the track while maintaining a tolerable cruising RPM on the street.

How do you reset gear ratios?

How To Set Gear Ratios (Here’s How)

  1. 1: Go to “Transmission Settings” on the car your tuning.
  2. 2: Press “Reset To Default”
  3. 3: Enter in your “Max Speed” (For example 230mph)
  4. 4: Now you should have what i call the standard ratio’s set once you’ve entered your “Max Speed” Here is the Audi’s list below.


Does gear ratio affect horsepower?

A higher numeric axle ratio (4.11:1) keeps the engine running in the higher horsepower range, thus improving performance. If fuel efficiency is your goal, you’ll want an engine that produces a lot of torque at low rpm (1,100-1,200 rpm).

Does bigger tires change gear ratio?

When taller tires are installed on a truck but the axle ratios stay the same; the effective gear ratio is reduced. … In order to restore the effective gear ratio (and the truck’s performance), you’ll need to have the axle gears swapped to lower (numerically higher) ratios.

Is 3.07 a good gear ratio?

3.07 is just fine, but with the LT1 you would probably like 3.54 or 3.73 better. It is still a good ratio to have. Late model F body = GM 10 bolt axle.

Are 3.73 or 4.10 gears better?

A 4.10 rear axle ratio is ideal for towing larger 5th Wheel or Gooseneck trailers. FACT: A 3.73 axle ratio is ideal for towing heavy loads on flat terrain and will produce increased fuel economy during steady-state, long-distance highway driving.

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Are 3.73 gears good for highway?

Rear end gears (2.79’s, 3.00’s, 3.25’s, etc) are great for freeway driving, bit not good for 0-60 MPH or accelerating from a dead stop. Shorter gears (higher numbers) are much better suited for accelerating, such as 3.55, 3.73, 3.91’s, 4.11’s etc. Always remember, for very “give” there is a “take”.

Are 4.10 gears good for highway?

Installing 4.10 gears improves the car’s performance on the track but with negligible effects to the highway driving. … Switching from a gear set of 3.55 or 3.73 to 4.10 gears will affect your gas mileage slightly as your engine will be turning more times to rotate the rear wheels once.

What gear ratio is best for fuel economy?

For instance, a 3:31 gets better fuel economy than a 3:73. On the other hand, a 3:73 or perhaps a 4:10 will tow much more, while fuel economy greatly drops. The most popular rear end ratio in trucks today is the 3:55, which sort of averages towing power and fuel economy.

What is the best first gear ratio?

For most street performance applications, a 10:1 final First gear ratio is usually considered optimal. The disadvantage of operating a 4.10:1 axle ratio on the street with a 1:1 high gear is excessive freeway engine speed.

Does 3.73 gears make a difference?

So, a truck with optional 3.73 gears will tow a heavier trailer than one with 3.55 or 3.21. But it will also use more fuel in all situations because the engine’s rpm will be higher. … Four-wheel-drive trucks will have a ratio in the front axle’s differential that closely matches that of the rear axle.

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