Quote:
Originally Posted by vskid3
One question, how do you figure that the Atkinson valve timing makes it 750cc and 6:1 compression? I've never seen any numbers for the effective compression ratio and I just didn't expect it to be so extreme.
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Using the valve timing numbers:
http://www.mr2.com/files/mr2/techinf...ata/1nzfxe.pdf
I think he means effective intake draw volume, since the displacement is always 1497cc. The 1NZ-FXE varies intake draw from 898cc down to 539cc. And since you're compressing less volume, your effective compression ratio is lower than your physical. Something like 7.8-4.68:1 vs 13:1.