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| Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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02-20-2015, 01:25 PM
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#1 |
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Compression/cylinder?
Anybody know how much compression our motors should be showing per cylinder? I checked on ProDemand and it's showing 167 PSI min, 254 PSI max, 29 PSI max variance. Can anybody confirm this?
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02-20-2015, 01:30 PM
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when I checked mine it was about 180psi on all cylinders
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| The Following User Says Thank You to 350matt For This Useful Post: | Amir Ghadiri (02-21-2015) |
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02-20-2015, 01:34 PM
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That's what I thought it should be at, thank you!
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02-20-2015, 02:17 PM
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14.7 PSI (atmospheric pressure at your altitude) * 12.5 (86 compression ratio ) = 183.75 PSI.
So that is the number that you should never be able to exceed with "static" CR (cranking it). At full speed, the "dynamic CR" is different. |
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02-21-2015, 03:23 AM
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Thank you very much, I appreciate it!!
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