Nissan 370Z Forum - Gas Pedal Delay

Nissan 370Z Forum (http://www.the370z.com/)

- Engine & Drivetrain (http://www.the370z.com/engine-drivetrain/)

- - Gas Pedal Delay (http://www.the370z.com/engine-drivetrain/20402-gas-pedal-delay.html)

Quote:

Originally Posted by JARblue (Post 4016426)

If you have a tune, it is truly a waste of money to also install a throttle controller (sprint booster). Just program the throttle maps in the tune to exactly what you want. The tune can program 100% throttle at 10% pedal if you so desired. Don't do that but just realize the sprint booster increases voltage which can simply be replicated exactly in the tune via programming. You can program different tune maps same as the sprint booster has different modes.

:iagree:

I'm not going to really read over the previous 70ish pages but is this issue related to when ecu sees full accelerator pedal position but delays opening of the throttle bodies? Noticed that happening in my ecutek logs before, didn't really feel it but there was for sure a delay between the two.

Quote:

Originally Posted by DrBacon (Post 4016440)

Generally that's the idea. It's an inherent issue with the pedal position sensor relative to the ECU's time to process the voltage signal inputs. ie. gas pedal pressed at like 50% to the floor as input and ECU translates it as about 10% output. Which can definitely affect throttle body plate actuation at low revs. Which would contradict the purpose of VVEL. Until recently I was told that the throttle plates ARE NOT fully open at low revs. Why this isn't an issue at high rev ranges i'd have to guess it's something to do with VVEL also.

Couple that with a very common and highly debated topic of heatsoak with the VQ37VHR due to high IATs and heat radiation from the engine bay exacerbates this issue even more.

Turning VDC off helps a little bit but not much.

On a good note. Contacted my local tuner that regularly tunes 370z with Uprev. They say most of the gas pedal delay is gone by tweaking the throttle maps with the standard tune (opening up the power band at low-mid RPM ranges) plus multiple modes. But they confirm it is still there albeit less noticeable.