That doesn't necessarily mean the ECU can adapt optimally to the new profile. They have to work in harmony.

Also, note that JUN provides their own ECU with it. Along with a spark and fuel reflash, it might also have different VVEL tuning in they were able to work with Nissan on it -- we just don't know.

Covered here:



Based on what I've seen, I'm positive there is closed loop feedback. We just need to see how good the system is at adapting.

Sub'd

So who wants to buy it and ship them to me? :D

Right... but all closed loop systems are slave to a set of known physical engine environment parameters that they trim the motor's behavior around.

For example, fuel trims aimed at keeping a target AFR that reflects a stoichiometric mixture of gasoline and air will not do a good job of adapting to a new fuel with different stoichiometrics, such as methanol, without changing the parameters. It will just run poorly as it tries desperately to tune for the wrong fuel.

As soon as you change the physical parameters without updating the ECU, it's anybody's guess.

We definitely need more info from JUN.

If i remember correctly,

Back in a while, Uprev was able to crack the cams maps in VVEL but they said that they didnt find any kind of gains and they need an aftermarket cams to test it again or something like that...

Well Uprev... you got what you ask for! :stirthepot:

^ that's news to me.

http://www.the370z.com/tuning/38796-...ng-vvel-6.html

theDreamer has a post halfway down the page that touches on this matter.

Which is exactly the same thing i said. We don't know how much effort Nissan put into testing the system with things like varied exhaust cam profiles. In all likelihood they did none/very little and the system will choke when you start changing stuff...but who knows?

Well then.

Well I just asked JUN if, all power gains aside, these would be ok to run on a stock motor or if the additional modifications they made would be necessary (primarily the fuel injectors and the ECU). Hopefully they get back to me soon.

But it is 11PM over there right now, so I may have to wait a bit. lol

I will shoot another email to Uprev and see what they say.

can the JUN cams be used with exhaust camgears? Jim Wolf Technology website

I would like to know if I can install this cam on a stock engine and how many hp it can add?

Anyone know about the Stillen pulley if it work good or no?

I'm waiting back to hear from JUN on the stock engine question. They are all sleeping right now over in Japan so hopefully I will get an answer later today.