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Old 08-15-2016, 10:04 AM   #1
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World's First Variable Compression Ratio Engine

I know there had been some recent discussion on the possible ability of the compression ratio to be altered by way of a tune and adjusting the valve timing, etc.
I thought this article might be of some interest to some that haven't seen it yet.

Infiniti Reveals World's First Variable Compression Ratio Engine Before Paris Debut

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Old 08-15-2016, 10:20 AM   #2
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thx.

I have a ? for the hive...I thought high compression was for power...this article sez different. I'm sure they are right what am I missing?
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Old 08-15-2016, 10:42 AM   #3
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Originally Posted by Strange Mud View Post
thx.

I have a ? for the hive...I thought high compression was for power...this article sez different. I'm sure they are right what am I missing?
You may be missing what I'm missing, which is the knowledge to interpret exactly what they mean when they say, "8:1 for high performance driving and 14:1 for maximum efficiency".
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Old 08-15-2016, 12:05 PM   #4
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Quote:
Originally Posted by Strange Mud View Post
thx.

I have a ? for the hive...I thought high compression was for power...this article sez different. I'm sure they are right what am I missing?
The engine is turbocharged so the compression ration is lowered during periods of high boost (i.e. high power) operation to avoid pre-ignition. Not sure these descriptions would be correct for a NA engine, if that's what you're thinking.
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