Yes, and you know these cars have more bottom end than that. I find it frustrating that I can get more acceleration if I go part throttle low down than I can if I floor it in the situations you are describing.

I am hoping Seb at SpecialtyZ will be able to perk it up a bit but if I feel that it still needs to be sharpened up, I will get the SprintBooster without a doubt.

For those who bought it; have you tried it on the most aggressive setting? Does it make the throttle extremely sensitive?

from all the reviews they say its extremely sensitive. but you get used to it :tup:

I am going to talk to Nissan about this after this weekend. I almost got T-boned today due to near zero response for a full second+. Like others have stated, it tends to be ok toward the beginning, but half way through my trip it starts really lacking low end. I have 6MT, TC was OFF, outside temp 94F (approx). Oil was 220F.
This could be a SERIOUS safety issue. Especially if it's fine (or not terrible) at one instant, then DEAD in another. If I ease on the pedal, it actually responds better than if I stomp it. But when there is oncoming traffic, your gut is to stomp... not the best idea.

Spot on, rolling into the throttle yields the best results. If you floor it immediately, it has a bit of hesitation as if it is thinking about going and then it takes off. I don't feel it as much above 4k rpm but low down is aweful.

Yep and yep. I agree with the 4k RPM.

You guys are right, this is a potentially dangerous issue (i.e., stuck on the railroad tracks type). After driving home from work yesterday, I don't think it's an oil temp issue though I use it as an indicator of how long the car was driven. On startup, the response is pretty good and better with VDC inactive. However, it is still not as peppy as the 350Z. In the 350Z, tapping the throttle can induce whiplash. After 10-15 minutes or so of driving the throttle response becomes increasingly laggy the longer I drive it.

Do you guys manually blip the throttle when downshifting? It's harder to manually rev match in this car than the 350Z. You literally have to tap the throttle over 50% and wait a little bit, or you'll end up bogging when downshifting. On the 350Z, the throttle is so sensitive simply resting your foot on it will cause it to rev quick.

Plus, on startup when progressively pressing down on the gas pedal in 2nd-4th the feeling is pretty linear. Later on, doing the same thing you will feel a bit of a "clunk" as if the car starts revving up at a certain rate and then abruptly cuts to a slower rate.

I messaged NNA a few days ago, and this is their response:

I have the slight throttle response delay as well. One thing I've noticed is that when the throttle is pushed down, the oil pressure drops immediatly (roughly 5 psi) and then the car will accelerate. I would possibly suggest it may very well be the time delay in the VVEL opening up to accelerate the car. With heat soak and high oil temps, it could very well be the changes in VVEL position causing the delays.

my :twocents:

OMG! I thought it was just me! I also installed an oil pressure guage. I just thought I had a faulty guage. But you are correct it does drop on oil pressure then rises back up when you accelerate.

It could be the VDC. Turn it off if youre ever gonna floor your car. If VDC doesnt cut it, then work your way with the clutch

I think it's a combination of the VDC and the ECU's programmed throttle response thresholds based on current RPM.

I'd be interested to know if the SB actually does anything beneficial.

hey guys just did a lil review bout the sprint booster :D

http://www.the370z.com/engine-drivet...z-7-speed.html

This is interesting. On the Evo X, which is also DBW, there is a 2D table that lets you ramp up the throttle response just like the SprintBooster does. In fact, in stock form, there is quite a bit of throttle input ramping on the Evo X. This must not be the case for the 370Z.

I wonder if such a table that maps throttle input to actual throttle plate movement exists on the 370Z. I'm sure UpRev knows about it if it does.

great review!

The stock pedal sends a voltage of 0 to 5V to the ECU to let the ECU know the pedal position, the voltage change is linear but the ECU can react to this voltage anyway it likes. The SprintBooster simply increases the voltage coming from the pedal such that you reach full voltage more quickly, i.e. you are shorting the pedal travel because the 3/4 pedal position is now WOT. You can do the same exact thing inside the ECU, so I say don't waste money on this just buy an UpRev license and do much more.

the delay is its downshifting ,remm its a 7 speed so the higher gear your in the longer the delay..downshift on your own and see what happens..