Hey guys.

Can anyone answer the following 2 questions?

1) What exactly is the range of mid, high, and low. I am looking at some modifications and people mention some give you power up top, some give you more mid range power. I do know what it means I just want to know the range.

For example, is low, mid, and high rpm divided evenly? so 0-3000rpm (low), 3000-6000rpm (mid), and 6000-9000rpm (high)? Or is it different?

2) Increase in amount of fuel injected when gas pedel is depressed. As you press down on the gas is the amount of increase in fuel use linear? Exponential?

Thanks

 

For the range, just take a look a dyno chart for a stock S2000, but it seems like every one has different opinions on this. This is what my opinion on my '01 S2000:

1500 - 3500RPM - bottom

3500 - 6500RPM - mid

6500 - 9200RPM - high

Notice how bottom does not start from 0 RPM. It shouldn't since 1500 is very close to the minimum RPM needed to start off normally in 1st gear. I also consider the VTEC crossover point as mid range not high.

Also keep in mind torque. While the F20C tops out HP at around 8300, peak torque is achieved around 6K. You need to understand the difference between torque and HP for this to make more sense.

Also, when you hit the gas pedal you allow more air to be sucked in by the engine, so it realy is an 'air' pedal. The ECU senses this extra air and makes the injectors spray more fuel in order to keep the air/fuel mix as stoichiometric as possible so air is relative to fuel. The more air ingested, the more fuel needs to be added to the mix or you will run lean (Or rich, in case of the mix having more parts of atomized fuel than air).

Hope this helps. Anyone wants to add or correct me please feel free.