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15 votes
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Is reverse gear in a manual transmission equivalent to any other gear?

Reverse is pretty equivalent to first gear, for a ratio of around 3.2ish. If it were any lower, it would be difficult to get started from a stop since the torque just won't be there. If you've ever ...
Dan A.'s user avatar
  • 494
12 votes

Does an increase in horsepower allow a greater speed in any given gear?

The answer is no because you mention being limited by your redline. Regardless of power, a certain RPM will result in a certain speed for a given gearing. Chances are the gear ratios were chosen ...
JPhi1618's user avatar
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10 votes
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Does an increase in horsepower allow a greater speed in any given gear?

Summarized Answer No, HP does not determine MPH in a gear, the gear ratio does. Although there are hypothetical ways that HP can seem to make the vehicle go faster in the same gear, it doesn't ...
kyle_engineer's user avatar
8 votes

Does an increase in horsepower allow a greater speed in any given gear?

Well the simple answer is (as you suspect)... No. With fixed gearing, you are going to be doing the exact same speed at any given engine RPM with 100bhp or 600bhp.
Digital Lightcraft's user avatar
8 votes

Optimal RPM range for manual transmission

It depends what you're trying to optimize. If you're looking for optimal acceleration, more RPMs are better. Most engines today produce peak power at redline. As for optimal efficiency, there's two ...
Tom Penny's user avatar
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8 votes
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Optimal RPM range for manual transmission

It is in fact true that driving at slightly (key word) higher rpms is much better (for both fuel efficiency and engine life. The rpm range for the two can be different). Part 1. Engine life: Every ...
krthkskmr's user avatar
  • 468
6 votes
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Why can a motorcycle rev higher than a car, in spite of both reaching the same speed?

One important factor is the mass of the components. Smaller, lighter components and shorter strokes allow higher RPMs. Given equal RPMs, an engine with a bigger stroke will put higher stresses on the ...
barbecue's user avatar
  • 1,587
4 votes
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Why does the wheel size affect the cars gearing?

The answer lies in the rpm conversion to ground travel. Any gearing in a motor vehicle is designed to provide sufficient torque to begin moving (with load, of course) and to keep the engine in the ...
fred_dot_u's user avatar
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3 votes
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Why after a certain RPM with the same gear selected the car no longer accelerates?

The amount of acceleration you feel depends on the amount of power the engine can deliver, and the speed you're driving at. Power Internal combustion engines are more efficient at some speeds than ...
Hobbes's user avatar
  • 4,412
3 votes

Why after a certain RPM with the same gear selected the car no longer accelerates?

First the bicycle example: resistance is acceleration essentially. If you feel it, you accelerate. You can spin your pedal only so fast, so after some time, you can no longer increase the speed of ...
Alexus's user avatar
  • 550
2 votes
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Tire and drive shaft revolutions near equal?

When a rear wheel drive car makes 1 tire revolution while driving how many revolutions does your drive shaft make? It depends on the gearing in the differential. If the gear ratio is 3.42:1, the ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
2 votes

Does an increase in horsepower allow a greater speed in any given gear?

Let's forget the power for a while. The body of your question shows that you're in fact interested in this: can a custom air intake influence the exact RPMs at which you "redline"? Well... yes, sort ...
kubanczyk's user avatar
  • 121
1 vote

Transmission Slipping, Mechanic Claims it needs re-build, then it suddenly starts working again - 2000 Nissan Xterra

It doesn't need a rebuild. A tranny shifting that badly due to mechanical problems would never correct itself for a time. A more likely cause is faulty/damaged/corroded wires or wiring harness. An ...
Carguy's user avatar
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1 vote
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Does increasing final drive ratio actually improve overall acceleration?

In general, you're right. The reason is along the lines of what you're saying, but there's another factor I don't think you've included. One of the things the lower (higher numerical) gearing does for ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
1 vote

Does an increase in horsepower allow a greater speed in any given gear?

To add to other answers, the only time extra horsepower will increase speed in a given gear is for top gear, as often the maximum speed is where the engine runs out of power to overcome rolling/air ...
Gargravarr's user avatar
1 vote
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Is the 2KD engine manual gearbox compatible with a 1KD?

The bellhousing and everything else perfectly fits, and the drive is smooth. what I am not sure is the nitty gritty like the size of the clutch.
mykey's user avatar
  • 121

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