gude-head-1NZ-FE - Toyota Yaris Forums

Bluevitz-rs · 04-02-2010, 01:54 PM

I'm pretty sure the 1NZ won't make any more power after 6500 because of the flow design of the head and cam profile in a N/A tune.

If you're to look at a dyno graph of a 2ZZ it stops making power at about 6000 but then the high profile cam lobe kicks in and power starts to climb again.

It's also the probable cause of the engine starting to richen up just before redline on the 1NZ. Flow can't keep up to the demand of the pistons.

To the OP, that head, if it does what it claims, would shift the power band much higher. That's the only way to make more power N/A other than increasing the displacement.

And Prius pistons would increase the CR to 13:1. So unless you're running on aviation fuel and running a standalone EM, it's a little out of the question for a DD.

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04-02-2010, 01:54 PM	#8
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	I'm pretty sure the 1NZ won't make any more power after 6500 because of the flow design of the head and cam profile in a N/A tune. If you're to look at a dyno graph of a 2ZZ it stops making power at about 6000 but then the high profile cam lobe kicks in and power starts to climb again. It's also the probable cause of the engine starting to richen up just before redline on the 1NZ. Flow can't keep up to the demand of the pistons. To the OP, that head, if it does what it claims, would shift the power band much higher. That's the only way to make more power N/A other than increasing the displacement. And Prius pistons would increase the CR to 13:1. So unless you're running on aviation fuel and running a standalone EM, it's a little out of the question for a DD.