ECU ; stock ECU Vs Nismo ECU difference

1slow370

uprev have any maps on the vvel position yet? is that what they are calling vvel timing? in which case is it supposed to be vvel lift in duty cycle or percentage of opening?

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Megan370z

There is 6 Map for the VVEL, each of them does something different and at looking at the graph we can finish by understanding a little bit more what does what ....

I am writing over those picture about MY opinion on it , I could be wrong or right. There hasn't been much info provided in the PRO email that Uprev sends their update. I am NOT an official PRO Tuner so its been a bit hard getting a bit more info on the subject other than their email update. Jared did respond when available though....

I haven't asked any specific details on those new available map since late last year (2013) So take what I write down with a gain of salt please.

Lets start with the first one.

VVEL Valve Clearance Limit



VVEL A



VVEL B



VVEL C
This graph look a lot to what I was logging when I had my VHR engine.
Depending how you setup your Cam Advance , I'm pretty sure this map could be setup quite more aggressively to act similar as a fixed cam.
On this map the VVEL is set low at mid-rev then open up at 4800



VVEL D
This map looks like a MAF Table but with the VVEL?
it does have to react very quickly at WOT or high RPM.
Which mean I might not be to far off !



VVEL Intake Phasing
Cam Advance is reduced while the VVEL opening up ! make sense....

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