I have a crazy idea...

toner123 · 04-02-2011, 01:06 AM

Quote:

Originally Posted by Jordo!

Really -- now that is interesting. So you can't just swap out the ECU?

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, 02:28 AM

Quote:

Originally Posted by toner123

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, 03:36 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, 04:43 AM

Huh -- go figure.

Okay, let's get some data logs then

G37sHKS · 04-02-2011, 06:43 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, 07:39 AM

Quote:

Originally Posted by G37sHKS

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, 09:23 AM

That's good to know though,

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

Megan370z · 04-02-2011, 10:04 AM

Quote:

Originally Posted by G37sHKS

That's good to know though,

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

just to show an example

1slow370 · 04-02-2011, 12:33 PM

Quote:

Originally Posted by Megan370z

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, 12:49 PM

Quote:

Originally Posted by 1slow370

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, 02:06 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, 03:47 PM

Quote:

Originally Posted by 1slow370

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!

1slow370 · 04-03-2011, 02:45 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, 11:31 PM

Quote:

Originally Posted by 1slow370

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, 10:11 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?

04-02-2011, 04:43 AM	#34 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	Huh -- go figure. Okay, let's get some data logs then __________________ Enjoy it. Destroy it.

04-02-2011, 02:06 PM	#41 (permalink)
esfourteen A True Z Fanatic Join Date: Mar 2010 Location: LI, NY Posts: 1,375 Drives: 40th TT Rep Power: 18	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). __________________ Build Thread \| GTM TT Install Thread \| Engine Build Thread

04-03-2011, 02:45 PM	#43 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	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. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

04-04-2011, 10:11 AM	#45 (permalink)
GZ3 A True Z Fanatic Join Date: Dec 2009 Location: SATX Posts: 3,296 Drives: Z Rep Power: 21	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? __________________ 09 GT-R 12' 370Z 7AT HANDED DOWN 12'+13' 5.0 SOLD

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04-02-2011, 03:36 AM	#33 (permalink)
90 ST A True Z Fanatic Join Date: May 2010 Location: Calgary Posts: 1,861 Drives: 90 and 15 GMC Sierra Rep Power: 421	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.

04-02-2011, 06:43 AM	#35 (permalink)
G37sHKS A True Z Fanatic Join Date: Feb 2010 Location: Dubai Posts: 1,183 Drives: 09 G37S Coupe 7AT Rep Power: 20	There is something I dont get it here. Can you data log the VVEL system and see the different between stock and Nismo?

04-02-2011, 09:23 AM	#37 (permalink)
G37sHKS A True Z Fanatic Join Date: Feb 2010 Location: Dubai Posts: 1,183 Drives: 09 G37S Coupe 7AT Rep Power: 20	That's good to know though, When I tuned my car I didn't see anything about VVEL datalog