More Average Torque and Horsepower Produces Faster Acceleration
Average torque determines how much useful power the engine produces
To base the performance of engines by their peak horsepower is great
for the ego but it does not determine the useful power
produced by the engine. Before the engine can reach its
peak horsepower it needs to produce a lot of low to midrange
torque (useful power) to accelerate a vehicle. The more
torque the engine produces without increasing peak horsepower
or rpm the faster the vehicle will accelerate. Therefore,
the average torque or horsepower produced from idle to
peak rpm determines how much useful power the engine produces.
| For example |
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Engine # 1 produces 500 hp at 6500 rpm and 400 lbs/ft of torque at 5500 rpm which produces,
250 average horsepower
Engine # 2 produces 400 hp at 4500 rpm and 600 lbs/ft of torque from 1000-3500 rpm which produces,
300 average horsepower
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While engine # 1 produces 100 peak horsepower more, engine # 2
produces a lot more torque (useful power) and an average
50 horsepower more than engine # 1. This allows engine
# 2 to accelerate the vehicle faster using less peak
horsepower. This is reason why engines with more average
torque but less peak horsepower produce faster acceleration
than engines with more peak horsepower but less average
torque and why engines should be measured by how much
average torque and horsepower they produce.
To determine the average torque or horsepower (useful power)
Add together the torque or horsepower produced at each 500 rpm increment
from 1000 to peak rpm and then divide the total amount
of torque or horsepower by the number of 500 rpm increments
from 1000 to peak rpm. The higher the average torque or
horsepower the faster the vehicle will accelerate regardless
of how much peak horsepower the engine produces.
| Torque (lbs/ft) @ each 500 rpm from 1000 to peak rpm |
= Average Torque |
| Number of 500 rpm increments |
|
| Horsepower @ each 500 rpm from 1000 to peak rpm |
= Average Horsepower |
| Number of 500 rpm increments |
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| Impulse Engine Technology
P/L |
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