Nissan 370Z Forum
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Nissan 370Z Forum (http://www.the370z.com/)
-   Tuning (http://www.the370z.com/tuning/)
-   -   I have a crazy idea... (http://www.the370z.com/tuning/33993-i-have-crazy-idea.html)

esfourteen 04-02-2011 01:06 PM
I'm not so sure the nismo has a more aggressive VVEL. From what i've seen, the nismos with full bolt-ons/tune and non-nismos with full bolt-ons/tune make nearly identical numbers (using the same local dyno).

Jordo! 04-02-2011 02:47 PM
Quote:
Originally Posted by 1slow370 (Post 1028019)
gonna have to correct you on that one, i know what each unit does and how and the vvel sub box has no control over the adjustment of the system.

It is a driver box that powers the motors on the actuators and reads the sensor input from the back of the heads the interperets the angle and the amount power and polarity sent to the motors to maintain that angle or change it at the desired speed according to the requested signal the ecu sends.

Of course it has a few more functions and several communication lines to the ecu but on the whole the vvel "tune" is stored in the ecu.

A certain company has been a little lazy about releasing the tuning software for the vvel, so i started to talk to GTM and some things will be coming together in the future
I stand corrected -- thanks for clarifying! :tiphat:

1slow370 04-03-2011 01:45 PM
it's cool but the main thing so far as the vvel tuning and gains goes is if the ecu is tunned to open the vvel to it's maximum angle or not, and at what degrees off cam timing it is allowed to do this. due to the nature of the beast on this one if the valves are open to far at the wrong time you may hit the piston so there is mechanical limitations to the amount of lift and timing that can be acheived.

Jordo! 04-03-2011 10:31 PM
Quote:
Originally Posted by 1slow370 (Post 1029879)
it's cool but the main thing so far as the vvel tuning and gains goes is if the ecu is tunned to open the vvel to it's maximum angle or not, and at what degrees off cam timing it is allowed to do this. due to the nature of the beast on this one if the valves are open to far at the wrong time you may hit the piston so there is mechanical limitations to the amount of lift and timing that can be acheived.
I was afraid of that -- there must be some math that can be applied to figure out the maximum lift though, right?

Not saying I know what that is -- but I can't believe there isn't a way to make a good educated guess before tweaking things...

GZ3 04-04-2011 09:11 AM
wow this VVEL thing is pretty serious, SO am guessing the best way to tackle this will have to be with an Adjustment and tunning?

Jordo! 09-27-2011 10:43 PM
Rise from the grave, thread!

Has anyone gotten together a datalog of the VVEL info from a Nismo? If so, please PM me :D

Lemers 09-27-2011 11:09 PM
Cool thoughts.

Megan370z 09-28-2011 05:40 AM
Quote:
Originally Posted by Jordo! (Post 1332903)
Rise from the grave, thread!

Has anyone gotten together a datalog of the VVEL info from a Nismo? If so, please PM me :D
no one ever bothered at doing this and talking about it.


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