1NZ-FXE inake manifold ? - Toyota Yaris Forums

Yaris Hilton · 06-28-2010, 02:44 PM

The only way to know what it will do is to try it, with a dyno run before and after under similar conditions. I suspect that the Prius manifold is tuned perfectly for Prius operating conditions, operating at midrange RPM with a VERY retarded intake cam to simulate Atkinson cycle operation. (Lets compressed air out the intake back into the manifold to drop compression, while keeping the full expansion stroke.) Whether its runner length also happens to be right for maximizing top end horsepower on an Otto cycle 1NZ-FE I don't know. There are formulas for calculating this stuff.

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06-28-2010, 02:44 PM	#19
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	The only way to know what it will do is to try it, with a dyno run before and after under similar conditions. I suspect that the Prius manifold is tuned perfectly for Prius operating conditions, operating at midrange RPM with a VERY retarded intake cam to simulate Atkinson cycle operation. (Lets compressed air out the intake back into the manifold to drop compression, while keeping the full expansion stroke.) Whether its runner length also happens to be right for maximizing top end horsepower on an Otto cycle 1NZ-FE I don't know. There are formulas for calculating this stuff.