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Sean.Heihn · 10-18-2013, 06:17 AM

I don't think the 1NZ-FXE ECU would work without the HSD. I wonder if a FE ECU would work? I think the 1NZ-FE actually uses Atkinson cycle at idle and low load, I was looking at the VVT-i timing chart for the Yaris and at idle/low load the intake stays open until 52* ABDC. That's 29% of the compression stroke.
http://www.microimageonline.com/down...als/Engine.pdf
http://www.mr2.com/files/mr2/techinf...ata/1nzfxe.pdf

10-18-2013, 06:17 AM	#27 (permalink)
Sean.Heihn EcoModding Lurker Join Date: Apr 2013 Location: Nowhere Posts: 53 Land Shark - '11 Toyota Yaris 3dr Hatchback Team Toyota 90 day: 36.68 mpg (US) Thanks: 0 Thanked 5 Times in 4 Posts	I don't think the 1NZ-FXE ECU would work without the HSD. I wonder if a FE ECU would work? I think the 1NZ-FE actually uses Atkinson cycle at idle and low load, I was looking at the VVT-i timing chart for the Yaris and at idle/low load the intake stays open until 52* ABDC. That's 29% of the compression stroke. http://www.microimageonline.com/down...als/Engine.pdf http://www.mr2.com/files/mr2/techinf...ata/1nzfxe.pdf Last edited by Sean.Heihn; 10-18-2013 at 06:26 AM..