This is a question for people with cars built before the 08 ECB program ( http://2007.infiniti.g35x.googlepage...ITB07-028a.pdf and https://g35driver.com/forums/showthread.php?p=2457134 ) who have installed intakes like the Stillen or Fujita. Did the install change the initial throttle response?

I brought my G in to get the TSB done to get the new codes, but they told me that although my VIN was within the effected range, my ECB was not and couldn't be updated. The throttle responds by bogging a little bit, then lurching. It does this anytime it goes from zero or low load, including stoplights and on the highway. If I nail it, all is well - the car is great when I'm relly hauling the chili. But trying to be smooth just driving around with Mom in the car is basically impossible.

So, I am wondering if an intake would change the harmonics enough at low throttle settings to improve this. Of course, in might make it way worse.

So, there is my question: if you've put a Stillen or Fujita on a 2007 G, did the throttle pickup get smoother or jerkier?

Thanks.

 

^ Unfortunately, I can't give you first hand experience, however I've installed intakes on my last 3 cars (including a G35c, 350Z and Prelude).

I've noticed in the past an intake usually keeps your throttle response the same or bogs while intially taking off. In the higher RPMs is where you really feel the difference.

An intake might make you issue worst.

Just my $.02.

Cheers

 

C'mon folks, has nobody installed an intake and noticed the way the throttle responds?

Or did my question make no sense? I'm talking about when you go from foot off the throttle to foot on the throttle just a little bit. It kinda hesitates, then takes off. Did that get better or worse when you pout on an intake? Put another way: did the intake make it easier or harder to drive super smooth?

 

I have a injen CAI on my 03 coupe and my throttle responce is poop. I have been telling myself that it is the transmission, throttle body, or drive by wire system, but now that i think of it it seems as though it might be the CAI. Im not sure though...

-Sean

 

Consider your foot position and pressure on the accelerator pedal.

I suspect the car moves quickly and smoothly when you drive aggressively because you move your foot to the top of the accelerator pedal. In a less spirited mode you probably let your foot slide to the bottom of the accelerator pedal.

The G 35 accelerator pedal is hinged at the top, not the bottom as are most pedals. Hence, with your foot pressure at the bottom of the pedal, you're not really getting the leverage you think you're getting, so there's a delay and then a jerk as you depress the pedal: at first you get limited response and then when the leverage kicks in you feel a jerk.

I found that moving the seat back and lower allows the foot to be right where it should be, at the top of the pedal. So pressure is immediately translated to the throttle.

Try it.

 

You are right, I have noticed that holding my foot in the manner you described helps. But that shouldn't be necessary - it isn't in my Pathfinder or S2000, both of which are top hinged.

The problem is twofold:
1) The throttle force is nonlinear. Press the S2000 throttle a bit and you get a bit of movement in the pedal, press 10% harder and the pedal moves 10% more. The G is more like an American car. You push hard to get it started, then it gets easier: 10% more moves the pedal 20% farther.

2) Number 1 is exascerbated by a problem in the throttle response. This has been admitted by Infiniti and covered in the 2008 calibration.

Of course, in your car, the problem should be much less an issue because you have that most wonderful of devices: a clutch. I wish I had talked my wife into the 6MT instead of the infernal slushomatic tranny. Good choice on you.

Anyway, when I put a short ram on it, I'll post whether the problem gets better or worse. I suspect worse, but what the hell.

 

I have an intake and i didn't really notice any difference except for the sound