prius piston swap - Toyota Yaris Forums

fast2882 · 04-09-2013, 02:14 PM

what i know is : 1nz-fxe has a greater effective expansion than compression—making it simulated Atkinson cycle, rather than the conventional Otto cycle. That difference makes the cam timing and lift different ( i think ). So, if we use 1nz-fe cam, which mean the ignition timing is more advance than the 1nz-fxe cam, do they still have a clearance between top of the piston and the valve?

JustDidIt · 04-09-2013, 03:46 PM

Quote:

Originally Posted by fast2882

what i know is : 1nz-fxe has a greater effective expansion than compression—making it simulated Atkinson cycle, rather than the conventional Otto cycle. That difference makes the cam timing and lift different ( i think ). So, if we use 1nz-fe cam, which mean the ignition timing is more advance than the 1nz-fxe cam, do they still have a clearance between top of the piston and the valve?

THAT is still one of the bigger questions... prob best to clay the piston and find out b4 firing it up. Try it at your own risk...

....but I'm sure it would be fine....

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04-09-2013, 02:14 PM	#1
fast2882 Drives: Toyota Yaris 2012 Join Date: Jul 2012 Location: Indonesia Posts: 16	what i know is : 1nz-fxe has a greater effective expansion than compression—making it simulated Atkinson cycle, rather than the conventional Otto cycle. That difference makes the cam timing and lift different ( i think ). So, if we use 1nz-fe cam, which mean the ignition timing is more advance than the 1nz-fxe cam, do they still have a clearance between top of the piston and the valve?