1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

compression power

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Old 04-04-03, 12:28 AM
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compression power

hey,
Does anyone know what the difference is (power & torque) between using NA or Turbo rotors for a NA engine?
Old 04-04-03, 09:02 AM
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power comes from compression of the mixture. turbo motors have lower compression since the turbo is cramming more volume into the motor. therefore if you put turbo rotors in a na motor it will have less power due to the lower compression.
Old 04-04-03, 03:43 PM
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I know that. I was looking for approximate numbers.
Old 04-04-03, 04:21 PM
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Originally posted by jeremy
power comes from compression of the mixture. turbo motors have lower compression since the turbo is cramming more volume into the motor. therefore if you put turbo rotors in a na motor it will have less power due to the lower compression.
How can you cram more volume into a set volume? Turbocharging is adding more mass for a set volume.

Very simplistically, CR tells you haw much energy you can get out of a charge in a dimensionless form. All else being equal, a 10% decrease in CR decreases the potential energy of your mixture by 10%, decreasing your output by 10%.
Old 04-04-03, 04:42 PM
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you call that simplistic?
Old 04-05-03, 03:17 AM
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anyone know any numbers?
Old 04-05-03, 09:32 AM
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Um, there was a chart somewhere.... I'll see if I can find it again.

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Old 04-05-03, 10:24 AM
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Originally posted by purple82
All else being equal, a 10% decrease in CR decreases the potential energy of your mixture by 10%, decreasing your output by 10%.
LOLn - It's not quite that simple!
Old 04-05-03, 11:39 AM
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Originally posted by purple82
How can you cram more volume into a set volume? Turbocharging is adding more mass for a set volume.

Very simplistically, CR tells you haw much energy you can get out of a charge in a dimensionless form. All else being equal, a 10% decrease in CR decreases the potential energy of your mixture by 10%, decreasing your output by 10%.
reading that gave me a nose bleed lol
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