Gas Pedal question.

Fabio88 · 10-07-2012, 01:13 AM

I want to know if there's a problem with my car, my car seems to go faster if I have my gas pedal down 60% then having it all the way down to the floor.

Have you guys experienced this?

Is this a fueling problem?

P.S. my car is turboed and has less then 5k miles on it.

The car that I notice this in is my Nissan 370z.

Mr&Mrs · 10-07-2012, 02:07 AM

So if I understand what you are trying to ask it is this: You press it down 60% pause then apply it 100%? Versus just 100% out of the box? Traction control, transmission slipping is all I can really think of this time of night lol

Fabio88 · 10-07-2012, 02:10 AM

sorry if i said it wrong i notice it goes faster at 60% throttle and it goes slower if i just had it all the way down at 100%.

Basically have the pedal half way down seems to go faster then having it all the way down.

there is no tire slipping just saying try it on the freeway when your at 55 mph and put pedal all the way down to see the reaction and speed then try again at same speed with the pedal half way down.

LakeShow · 10-07-2012, 02:12 AM

Are you sure your not holding down the brake pedal.

Fabio88 · 10-07-2012, 02:12 AM

lol lakeshow your funny

Mr&Mrs · 10-07-2012, 02:17 AM

Like I said could be the transmission slipping a little I guess. You Manual or Auto?

Fabio88 · 10-07-2012, 02:18 AM

manual

Mr&Mrs · 10-07-2012, 02:24 AM

Are you still on the factory clutch? What kind of HP numbers are you currently putting down? My TT slips a little on the factory clutch if I floor it in 5th or 6th at 55+ MPH. If I down shift into a lower gear first it isnt as bad.

lhinojos · 10-07-2012, 02:34 AM

You said freeway at 55 mph? What Rpms were you at? the engine can only push so much at lower rpms so pressing the gas pedal farther isn't necessarily gonna mean your gonna go faster.

Mt Tam I am · 10-07-2012, 11:21 AM

Quote:

Originally Posted by Fabio88

I want to know if there's a problem with my car, my car seems to go faster if I have my gas pedal down 60% then having it all the way down to the floor.

Have you guys experienced this?

Is this a fueling problem?

P.S. my car is turboed and has less then 5k miles on it.

The car that I notice this in is my Nissan 370z.

This is wrong. Get it checked out soon. Our pedals are fly by wire so I bet the problem lies here.

jcosta79 · 10-07-2012, 03:28 PM

This is due to programming. When you floor the gas pedal, the computer is not opening your throttle completely. This is normal and is set that way from the factory for safety. So when you give it 60% throttle, the computer may actually give you the full 60%, hence it may really be faster than giving it 100% all at once because the computer might be holding back the actual throttle plate opening to less than 60%.

What is peculiar is that since you already have twin turbos on the car, that your tuner did not correct this factory throttle delay when they tuned your car. I would ask them if they worked on the throttle settings and if they didn't, I would ask them if they could fix it for you (since they should have done this during the initial tune).

DIGItonium · 10-07-2012, 11:47 PM

Interesting explanation as I experience the same exact feeling. It feels like it's holding back power around 4k. There are times when boost builds up quick, and other times it ramps up in parallel to engine RPM. It's still on GTM's tune, in which the throttle tables are still stock. It would be nice to be able to make such changes on my own, but I don't have the tuner license.

Mr&Mrs · 10-07-2012, 11:59 PM

Well you have an upgrade clutch system DIGI so that throws my slipping clutch idea out the window. I have only driven the boosted Z a couple hundred miles still and not even come close to beating on it. I will have to give this a try next time I get a chance to "drive" it.

jcosta79 · 10-08-2012, 10:09 AM

Quote:

Originally Posted by DIGItonium

Interesting explanation as I experience the same exact feeling. It feels like it's holding back power around 4k. There are times when boost builds up quick, and other times it ramps up in parallel to engine RPM. It's still on GTM's tune, in which the throttle tables are still stock. It would be nice to be able to make such changes on my own, but I don't have the tuner license.

Invest in a good tune/tuner and you should see more power and better drivability.

OMGiGOTaZ · 10-08-2012, 10:17 AM

Quote:

Originally Posted by Mt Tam I am

This is wrong. Get it checked out soon. Our pedals are fly by wire so I bet the problem lies here.

Has anyone tried the APEXi Throttle Control?

10-07-2012, 01:13 AM	#1 (permalink)
Fabio88 Banned Join Date: Jun 2012 Location: sdasda Posts: 235 Drives: asdfasdf Rep Power: 0	Gas Pedal question. I want to know if there's a problem with my car, my car seems to go faster if I have my gas pedal down 60% then having it all the way down to the floor. Have you guys experienced this? Is this a fueling problem? P.S. my car is turboed and has less then 5k miles on it. The car that I notice this in is my Nissan 370z. Last edited by Fabio88; 10-07-2012 at 02:07 AM.

10-07-2012, 02:07 AM	#2 (permalink)
Mr&Mrs A True Z Fanatic Join Date: May 2010 Location: Tampa Posts: 4,207 Drives: RZ34 Rep Power: 31940	So if I understand what you are trying to ask it is this: You press it down 60% pause then apply it 100%? Versus just 100% out of the box? Traction control, transmission slipping is all I can really think of this time of night lol __________________ Project Z <--Click - Check out the link too many mods to list!

10-07-2012, 02:12 AM	#4 (permalink)
LakeShow A True Z Fanatic Join Date: Dec 2010 Location: L.I., NY Posts: 5,307 Drives: Everything Rep Power: 26	Are you sure your not holding down the brake pedal. __________________ \|2013 Audi S4\|Ibis White/Black\|S-Tronic P+\| \|2013 370z\|PearlWhite/Persimmon\|Touring/Sport/Nav\|F.I. CBE 18" CF\| \|Sold\|2011 370z\|Gun Metallic\|Touring/Sport/Nav\|

10-07-2012, 02:17 AM	#6 (permalink)
Mr&Mrs A True Z Fanatic Join Date: May 2010 Location: Tampa Posts: 4,207 Drives: RZ34 Rep Power: 31940	Like I said could be the transmission slipping a little I guess. You Manual or Auto? __________________ Project Z <--Click - Check out the link too many mods to list!

10-07-2012, 02:24 AM	#8 (permalink)
Mr&Mrs A True Z Fanatic Join Date: May 2010 Location: Tampa Posts: 4,207 Drives: RZ34 Rep Power: 31940	Are you still on the factory clutch? What kind of HP numbers are you currently putting down? My TT slips a little on the factory clutch if I floor it in 5th or 6th at 55+ MPH. If I down shift into a lower gear first it isnt as bad. __________________ Project Z <--Click - Check out the link too many mods to list!

10-07-2012, 02:10 AM	#3 (permalink)
Fabio88 Banned Join Date: Jun 2012 Location: sdasda Posts: 235 Drives: asdfasdf Rep Power: 0	sorry if i said it wrong i notice it goes faster at 60% throttle and it goes slower if i just had it all the way down at 100%. Basically have the pedal half way down seems to go faster then having it all the way down. there is no tire slipping just saying try it on the freeway when your at 55 mph and put pedal all the way down to see the reaction and speed then try again at same speed with the pedal half way down.

10-07-2012, 02:12 AM	#5 (permalink)
Fabio88 Banned Join Date: Jun 2012 Location: sdasda Posts: 235 Drives: asdfasdf Rep Power: 0	lol lakeshow your funny

10-07-2012, 02:18 AM	#7 (permalink)
Fabio88 Banned Join Date: Jun 2012 Location: sdasda Posts: 235 Drives: asdfasdf Rep Power: 0	manual

10-07-2012, 02:34 AM	#9 (permalink)
lhinojos Track Member Join Date: Apr 2012 Location: Riverside, CA Posts: 559 Drives: 12 370z GM M6 Rep Power: 14	You said freeway at 55 mph? What Rpms were you at? the engine can only push so much at lower rpms so pressing the gas pedal farther isn't necessarily gonna mean your gonna go faster.

10-07-2012, 03:28 PM	#11 (permalink)
jcosta79 A True Z Fanatic Join Date: Jul 2012 Location: N/A Posts: 1,430 Drives: N/A Rep Power: 15	This is due to programming. When you floor the gas pedal, the computer is not opening your throttle completely. This is normal and is set that way from the factory for safety. So when you give it 60% throttle, the computer may actually give you the full 60%, hence it may really be faster than giving it 100% all at once because the computer might be holding back the actual throttle plate opening to less than 60%. What is peculiar is that since you already have twin turbos on the car, that your tuner did not correct this factory throttle delay when they tuned your car. I would ask them if they worked on the throttle settings and if they didn't, I would ask them if they could fix it for you (since they should have done this during the initial tune). __________________ 2012 PW NISMO #0559 - GT Spec Brace Kit - Swift Springs - ARK TP & Invidia CBE K&N Intake - UpRev Tune - 15mm Z1 Spacers & Studs - StopTech Slotted Rotors & SS Lines - ZSpeed CMAK with Stage 2 Clutch and Lightweight Flywheel

10-07-2012, 11:47 PM	#12 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 43	Interesting explanation as I experience the same exact feeling. It feels like it's holding back power around 4k. There are times when boost builds up quick, and other times it ramps up in parallel to engine RPM. It's still on GTM's tune, in which the throttle tables are still stock. It would be nice to be able to make such changes on my own, but I don't have the tuner license. __________________

10-07-2012, 11:59 PM	#13 (permalink)
Mr&Mrs A True Z Fanatic Join Date: May 2010 Location: Tampa Posts: 4,207 Drives: RZ34 Rep Power: 31940	Well you have an upgrade clutch system DIGI so that throws my slipping clutch idea out the window. I have only driven the boosted Z a couple hundred miles still and not even come close to beating on it. I will have to give this a try next time I get a chance to "drive" it. __________________ Project Z <--Click - Check out the link too many mods to list!

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