the other day when I was installing my system in the Z, I noticed a 2 inch metal block behind the accelerator pedal. LIke a stopper, is this to keep it from bieng at complete WOT?? Or just there for the hell of it, the other 2 pedals dont have that. My friend told me that some of ther previous year mustangs had that on them and by removing it, you could get a real WOT. ANyways just a curious question/....

 

sadly i doubt it will do anything...
as long as the throttle is calibrated properly...
because our throttle is by a sensor and not by a cable

 

Since the Z is "fly-by-wire", there is no physical connection between the pedal and the throttle. As several people have also discovered, if you hook up an OBDII reader, the throttle never opens to 100%. Apparently about 85% is the max.

 

Does that account, partially, for the slow RPM gaining? Since it's NA it's nice that it gains RPMs so consistently, but I can floor it and just sit there and watch the RPMs slowly climb. I know it's the gearing as well, they are really long. It just seems like it doesn't gain RPM's very quickly to me.

 

Is there a way to make it open 100%?

 

as long as the fuel and timming maps are maximized by the computer by 85% it doesn't matter...

 

A reflash will improve throttle response.

 

I notice that too, when i floor it, it takes a good second or two before WOT

 

Oooo, we should be able to fix that.

 

For driveability purposes, drive-by-wire system do not "snap" to WOT ever. The engine would bog down from the sudded drop in air velocity (venturi effect) and then jump in rev has the injection adjust and airflow is re-establish.

Get that while in a curve, and you break traction and end up in the ditch.

A lot of high output engines with cable throttle have secondary thottles controled by the ECU (Ferrari engines, many sport bike engines also).

I probably should check to see if I do get 100% throttle when I floor the pedal. I remember seeing some info on resseting that in the Nissan Tech documents...

 

May be its the Nismo wing.

 

Lol

 

Explain please.

 

so i am curious... is there any time the throttle ever goes 100% WOT

 

It has to do with the inertia of air and maintaning the airflow velocity in the intake.

Most intake system feature reservoirs. These serve as silencers to reduce the intake noise in part. They also serve as air reserve for when the throttle goes from almost closed to WOT. Air, being heavy, cannot accelerate fast enough to match the increased air demand from the engine. Without these reserve, the intake will empty before the airflow can match the engine demand.

Looking at the Z intake, it pretty much direct. I'm certain the thottle is programmed to slow down it's opening to give time to the air flow to adjust.

Reason why when Rice boys put a short ram intake, they often endup with rough idle...

 

automatic right?

 

Hey I had the same question..... It is just a safety device.. It doesnt stop you from reaching wot! Your safe!!!!!

 

ECU reflash will make it open 100%

both the technosquare L-spec and F-spec flash or altered atmoshpere reflash

 

Opening to 100% will not help you do anything better. If I am not mistakesn, the flow capability of a butterfly valve open at 80% is for all practical purposes the same as at 100%.

 

Just wondering.

On what basis are we arguing the throttle does not open to 100% ? Anybody has real data or is it that the engine feels like it’s not WOT?