I'm stuck...I'm pretty sure a tune would fix this issue, but at 6K miles, I'm still way inside warranty. :mad:

The vdc will actively cut power. What you are talking about happens all the time to me. Even though you are on the pedal there is no respose. It's drive by wire. If you get on the gas smooth enough it doesn't happen. When you turn vdc off the tires will spin all day without any weird power cuts. Maybe you guys have something more extreme going on and there maybe a problem but it doesn't sound too different from what I have seen. I have read on here that a heavier flywheel can help minimize the bog down on a hard launch, but it will take longer to spin up.

OK, I'll try this out...thanks JHH343. If this is the case, then VDC is WAY too conservative...

There is a lot of discussion about how intrusive it is on this forum. You can't even completely turn it off without removing something under the console. If you can be real smooth with the steering/throttle inputs, it will leave you alone. It still gets me from time to time though. Hope it solves your problem.

VDC off...still getting the "bog". I'm convinced its in the factory tune...

Do have a manual or an automatic?

This may answer your question:

Throttle Response: DE/HR vs VHR

6 Spd Manual...Sport Package. This is completely frustrating...may have to go the custom tune route, warranty be damned...

You might want to let Nissan look at it first, just to be on the safe side.:tiphat:

THIS is exactly what I am feeling, its a huge dead spot off the line (independent of the throttle position) until it "catches" and accelerates. This piss poor factory throttle mapping really kills the enjoyment of the car. I guess my only alternative is to roll the dice and do the custom tune (Uprev?) or live with it until the warranty expires. :mad:

:iagree:

Bushman66, take his advice.

some people have reported better throttle response with the sprint booster. while I haven't used it personally, I figured I'd just throw that in here.

A ton of variables, so I would run through everything to pinpoint the problem. If you haven't done so already, check the intake side of the equation for anything coming loose or a dirt filter. I found leaves in the intake the first time I cleaned it out. It might even be something as simple as a bad batch of gas. It just seems odd that an CBE alone would throw off the ECU that much.

Are you trying to lauch the car off the line...and if so @ what rpm?

I will take it in, just to be safe, but I'm betting they don't find anything. I'm launching at say 2000RPM (not riding the clutch too much), then punching it. The "bog" is so pronounced that it almost throws me forward into my seatbelt, then throws me back into the seat when it "catches".

My twin turbo Porsche just accelerates smoothly off the line and its a turbocharged engine where you would expect turbo lag. The 370Z, being normally aspirated, should accelerate more smoothly than that. Really the best analogy I have is when we used to mess with 60's musclecars and Holley carbs, we'd get that "bog" off the line when you'd slam your foot to the floor and we would tune it by changing out power valves, jets, etc. until we got that smooth application of power. I'd never expect a modern EFI to bog like this off the line...

im not bogging like this, maybe there really is a problem.