G37HKS

Hey guys.. can we install Motec ECU on VVEL engine? or it dont have that technology to handle the VVEL?

im thinking of modding my car then throw a MoTec M600 on it but still not sure if it can fit with VVEL.. any1 know?
so my question is can i replace my stock ecu to Motec M600?

sharif@forged

iTrader: (2)

You can literally do anything you want with the Motec. Might as well just max out lift on the VVEL, and not even mess with it. The main reason for VVEL, is emmissions and fuel economy, not all out performance. One of the reason the GT-R doesnt have VVEL.

Mike

iTrader: (1)

I would answer, but Sharif summed it up

oOmikeyboy

iTrader: (3)

So does that mean VVEL is a hindrance rather than a good thing for performance?

sharif@forged

iTrader: (2)

It adds weight, and significant added complexity, but I don't think I would call it a hindrance.

SOLISIMO

iTrader: (7)

Sounds like a pain in the azz to me

Mike

iTrader: (1)

On paper, it is superior to traditional variable valve timing, since it is infinitely variable. The question is, how tunable is it?

G37Sam

Now I'm thinking, how hard would it be to get rid of the whole vvel system lol

sharif@forged

iTrader: (2)

Unfortunately, it's rediculous integrated into the cylinder head. But one could easily max it out, but a full standalone would be required, as the engine would otherwise go into a limp mode loop. yeah!

chamelieon

iTrader: (1)

hmmm how would u know that? u holding something out from us ?

AussieV36

would the VVEL get in the way for eg if an air/fuel piggyback controller were to be used?
ie; could it trigger limp mode if it senses a change in a/f ratio from the controller

G37Sam

I know someone who installed a piggyback UniChip to adjust his A/F and Ignition timing in Dubai and his car worked fine so I'm guessing you should be too

shumby

iTrader: (3)

ya but chipping a camel is way different then chipping a G

sharif@forged

iTrader: (2)

Nope you will be there there.

jran76

iTrader: (2)

I am pretty sure the VVEL is controlled by a separate ECU. Adding a Motec or any other piggyback or stand-alone will do nothing to the VVEL. I have a feeling you will see a VVEL controller popping up in the near future. Now the CVTC system is controlled by the ECU (just like older VQ's-- this controls cam phasing). Lift, duration, overlap, etc. are all part of the VVEL system, and will require a controller for the VVEL system or some type of mechanical adjustments to change.

You would have to scrap the entire head, and make some serious electrical and sensor changes to get rid of the VVEL. The head on the VQ37VHR is completely un-serviceable per Nissan. If something goes wrong, the entire head will be replaced. It is nearly impossible to replace the intake cams due to mechanical complexities, and the exhaust cams would take some major work unlike any set of cams currently available. In theory you could use the head off another HR series VQ engine, but there are some obvious drawbacks and issues in doing so.

On our VVEL system, duration and lift adjustments can be made with adjustment screws on the head (intake side only, the exhaust side will require new cams to change duration and lift). These adjustments are pretty complex and will require fixtures and jigs to do so. All other variables are controlled by the VVEL ECU (controller). The most important part of this is valve movement (this also greatly affects throttle response). Cam phasing is part of the CVTC system, which in theory can be controller by the ECU.

If you really care about this stuff, I would highly recommend reading the following article: http://www.370z.com/MagazineArticles...akthrough.aspx

There is a lot of mis-information out there about the VVEL system, and the above article should clear it up....