Is that done just with UpRev or some kind of tune?

Check your oil temperature. Sounds like you might be going into "limp" mode. Mine has the same problem when my oil hits 220 or so. I also stall out if I let out on the clutch at my normal speed.

Yea I hate the electronic throttle on the 370Z, first gear especially can be herky jerky with the lag delay...the 350 had much more direct throttle response. So this can be reprogrammed via AccessPort?

Say what?

OK....the throttle plates close on the 370Z under what conditions??

I was under the impression that the ONLY time they closed was at idle and during deceleration. That's what VVEL is all about I thought. Throttle plates remain WIDE OPEN all the time and the amount of air getting into the cylinders is controlled by the VVEL, hence no real need for throttle plates (other than for emissions).

My 6-spd S/P has never had these symptoms. I noticed a delay in power only when the slip light illuminates because it detects slip. Otherwise, mash it to the floor in any gear and it instantly goes.

Late,
Trav

Bingo.

Even on my automatic, I haven't seen where it isn't opening up. What I have seen is when I've floored it and it doesn't downshift immediately, but of course this only happens when not in Manual mode. This only happens under certain conditions (not exactly sure what conditions though).

Interesting. I need to get a video of my car... If I give it throttle in 1st or second gear under 3k RPM it just bogs down and literally does nothing for a second or two... then it goes.

It's kind of funny because it throws me forward as I'm bracing for acceleration (it starts to go, then stops... waits, then goes). It's NOT VDC I can tell you that.

Been toying with putting the stock intakes back on the car (and exhaust if necessary) to see if any of those are causing a problem, but I should probably just get the thing tuned.

Now that I think about it, it behaves as if the car isn't picking up any fuel... I wonder if it could be a pickup issue?

I have the exact same symptoms. Its very annoying.

I'm glad I'm not the only one. It's honestly a dangerous situation. There have been a couple times when turning right from a red where the car just WOULD NOT move when I needed it to. Very frustrating.

Hell, even taking off from a light sometimes I bet I could get taken by a Prius.

that is the exact problem I am having (even with the bracing for take off, lol) I do notice my temp is running 220 which I have read is a problem, so I am unsure if it is throttle response or an engine safety. The more I read about the temp on the Z's the more it is worrying me, as I live in AZ where it gets pretty damn warm in the winter, and flat out hot in the summer!!!

Limp mode shouldn't be an issue until 270ish or wherever it kicks in. 220 is a fairly normal operating temp... shouldn't be the culprit here, although you can feel a difference in power between 220 oil and 200 oil, for example.

Yes, it's just ECU mapping.

I agree, I had said my 350 felt faster than my 370 at the low end

Sounds to me more like self induced limp mode, so to speak.

Yeah, when oil temp gets just above 220, I start to lose throttle response. So I guess it's not a full limp mode; but there is a NOTICEABLE lag between when the pedal goes down and when the engine responds. At lower temps its just fine.
I was going down the road and a 'stang wanted to go. Took him from 2 moving starts, but as soon as we got to a red light, my oil was already over 240. I knew it was over at that point. I didn't stand a chance.