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The mkiv Supra Owners Club

HP vs Bar


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The absolute power figures you'll get depend heavily on the parameters involved : car weight, friction, road levelness.

But the *relative* power figures you've seen are not far off.

0.6 bar v 1.2 bar would not imply twice the power at 1.2 bar (I hope you understand that)

'bar' is static pressure (over atmospheric) at the intake, power is something else altogether (loosely related though).

 

Even if you translate it to absolute pressure figures (adding 1 bar to each) you still won't see a linear relationship with power output.

The more you move away from the stock setup, the more suboptimal it becomes (i.e. less extra power for each extra bar)

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The absolute power figures you'll get depend heavily on the parameters involved : car weight, friction, road levelness.

But the *relative* power figures you've seen are not far off.

0.6 bar v 1.2 bar would not imply twice the power at 1.2 bar (I hope you understand that)

'bar' is static pressure (over atmospheric) at the intake, power is something else altogether (loosely related though).

 

Even if you translate it to absolute pressure figures (adding 1 bar to each) you still won't see a linear relationship with power output.

The more you move away from the stock setup, the more suboptimal it becomes (i.e. less extra power for each extra bar)

 

Thanks that so even I can understand it :)

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What I meant is that double the boost doesn't mean double the power.:)

 

Under theoretically ideal conditions, double the absolute intake pressure could mean double the power - but conditions are often less than ideal, so diminishing returns kick in soon after boost is increased.

On a UKSpec returns tail off sharply after 1 bar and even sharper after 1.2.

Soon after you get just extra heat and less power (hot air registers as high boost, complicating things further)

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