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)

toner123 04-02-2011 12:06 AM
Quote:
Originally Posted by Jordo! (Post 1027480)
Really -- now that is interesting. So you can't just swap out the ECU? :confused:
can not just swap the ecu has to be programed for your car. When I first got my car they had to replace my ecu and they had to load it to the car based of my vin. When I asked the guy about it being plug and play he said no that it had to be loaded, when I asked him what if he didn't he said the car wouldn't start just crank over. I don't know the truth behind this because I am sure he never tried it but maybe in there manual it i says that.

christian370z 04-02-2011 01:28 AM
Quote:
Originally Posted by toner123 (Post 1027549)
can not just swap the ecu has to be programed for your car. When I first got my car they had to replace my ecu and they had to load it to the car based of my vin. When I asked the guy about it being plug and play he said no that it had to be loaded, when I asked him what if he didn't he said the car wouldn't start just crank over. I don't know the truth behind this because I am sure he never tried it but maybe in there manual it i says that.
That system is in place on almost all newer cars to prevent car theft. If a thief had a key programmed with a particular ECU, they could theoretically break into a car, install their ECU and drive away with the car.

At least I believe that is the reason...

90 ST 04-02-2011 02:36 AM
i had to have my ECU replaced, and it would have been about 1300 CD if not for warranty. So i'm thinking even if it does work, there are better things to spend the money on for more power.

Jordo! 04-02-2011 03:43 AM
Huh -- go figure.

Okay, let's get some data logs then :tup:

G37sHKS 04-02-2011 05:43 AM
There is something I dont get it here.

Can you data log the VVEL system and see the different between stock and Nismo?

Megan370z 04-02-2011 06:39 AM
Quote:
Originally Posted by G37sHKS (Post 1027703)
There is something I dont get it here.

Can you data log the VVEL system and see the different between stock and Nismo?
yes you can datalog the vvel in degres , voltage and VVEL learning parmeter if i remember correctly

G37sHKS 04-02-2011 08:23 AM
That's good to know though,

When I tuned my car I didn't see anything about VVEL datalog

Megan370z 04-02-2011 09:04 AM
Quote:
Originally Posted by G37sHKS (Post 1027778)
That's good to know though,

When I tuned my car I didn't see anything about VVEL datalog
just to show an example

http://www.the370z.com/members/megan...el-example.jpg

1slow370 04-02-2011 11:33 AM
Quote:
Originally Posted by Megan370z (Post 1027077)
the VVEL actuator motor are connected to their Module which is then connected into the ECM...

but no one knows what unit does what and how...


edit ; i doubt someone just swaped a Nismo Ecu into a normal 370z because its a bit more complicated than that
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

Megan370z 04-02-2011 11:49 AM
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 had an idea it was something like that but no one seem to have been able to confirm it. All I know is what I see in the service .pdf , it is first connected to the VVEL module then the ECM.

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?


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