Car is faster with gradual trottle

mankytron · 08-11-2014, 09:23 PM

Just wondering if anyone else has noticed this, or maybe something with my car. If I am in 3rd and gradually put the petal down as the car picks up it seems fast, if I just go wot, it seems to accelerate slower. Running cobb stage2+. Will get some logs done soon.

Give_Em_The_DD · 08-11-2014, 10:48 PM

Haha I was just talking to a friend about this. I think it's because on stock throttle settings, 1/2 throttle it's closer to like 80%, so WOT isn't as aggressive feeling.

Reckless335 · 08-11-2014, 11:09 PM

Do you have linear throttle settings or stock throttle settings?

KLin · 08-11-2014, 11:59 PM

I've noticed the same thing in 2nd and 3rd. I'm on stock throttle setting Cobb Stage 1.

SteveAZ · 08-12-2014, 12:42 AM

Yes, I've noticed that as well but I've pretty much narrowed it down to the fact that my tires are spinning or DTC is going nuts and pulling timing.

mankytron · 08-12-2014, 07:32 PM

Quote:

Originally Posted by latino1ny

Do you have linear throttle settings or stock throttle settings?

Running the ST map now, had it on LT, but car feels slower, at least off the line.

mankytron · 08-12-2014, 07:45 PM

Quote:

Originally Posted by SteveAZ

Yes, I've noticed that as well but I've pretty much narrowed it down to the fact that my tires are spinning or DTC is going nuts and pulling timing.

I am sure my tires aren't spinning...a least not that much! (my new conti dw's hook up well). I have not tried a run with the DTC off. I just wonder if it is the engine control pulling boost via throttle corrections or pulling timing at wot. Hopefully some logs will shed some light. Come to think of it my last car, a JHM tuned Audi s4 behaved similar with gradual throttle vs wot...and it was naturally aspirated.

j1gilles · 08-12-2014, 08:27 PM

Quote:

Originally Posted by mankytron

I am sure my tires aren't spinning...a least not that much! (my new conti dw's hook up well). I have not tried a run with the DTC off. I just wonder if it is the engine control pulling boost via throttle corrections or pulling timing at wot. Hopefully some logs will shed some light. Come to think of it my last car, a JHM tuned Audi s4 behaved similar with gradual throttle vs wot...and it was naturally aspirated.

Why are you going WOT with the DTC still active? Our cars have a super sensitive traction control system. I've gone WOT in 3rd gear (awd/xi) with my DTC active and the ECM "stepped in"...

mankytron · 08-12-2014, 08:36 PM

Quote:

Originally Posted by j1gilles

Why are you going WOT with the DTC still active? Our cars have a super sensitive traction control system. I've gone WOT in 3rd gear (awd/xi) with my DTC active and the ECM "stepped in"...

I will try the DTC off next time I am playing around, but the car still accelerates harder with gradual throttle, so you would think that would be the time the DTC would kick in the most???

j1gilles · 08-12-2014, 10:19 PM

Quote:

Originally Posted by mankytron

I will try the DTC off next time I am playing around, but the car still accelerates harder with gradual throttle, so you would think that would be the time the DTC would kick in the most???

easing into the throttle will reduce wheel spin...at least in my car it does

08-13-2014, 07:10 AM

Quote:

Originally Posted by mankytron

Running the ST map now, had it on LT, but car feels slower, at least off the line.

Well of course it would...it has to do with the level of input given the pedal position of the stock throttle calibration (as already mentioned above). This is especially true if you have an auto.

Carl Morris · 08-13-2014, 02:17 PM

I saw this thread the other day...I've experienced it myself but nothing came to mind. But then today I remembered that sometimes you get big timing pulls due to boost/load overshoot. I suspect that when you ease into the throttle you are less likely to have that happen.

gtaccord · 08-13-2014, 05:23 PM

Turn off your traction control.....

08-11-2014, 09:23 PM	#1
mankytron Private First Class 20 Rep 120 Posts Drives: 335 coupe Join Date: Mar 2014 Location: ontario canada iTrader: (0)	Car is faster with gradual trottle Just wondering if anyone else has noticed this, or maybe something with my car. If I am in 3rd and gradually put the petal down as the car picks up it seems fast, if I just go wot, it seems to accelerate slower. Running cobb stage2+. Will get some logs done soon.
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08-11-2014, 10:48 PM	#2
Give_Em_The_DD Banned 258 Rep 1,084 Posts Drives: 2010 black 335xi coupe Join Date: Sep 2013 Location: IL iTrader: (2)	Haha I was just talking to a friend about this. I think it's because on stock throttle settings, 1/2 throttle it's closer to like 80%, so WOT isn't as aggressive feeling.
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08-11-2014, 11:09 PM	#3
Reckless335 Captain 77 Rep 980 Posts Drives: '08 BSM 335i e92 Join Date: Oct 2013 Location: Norfolk iTrader: (4) Garage List 2008 BMW 335i [0.00]	Do you have linear throttle settings or stock throttle settings? __________________ '08 BSM E92 335i 6MT/MHD stg 2+/VRSF 7" FMIC/VRSF CP/HKS BOV/VRSF catless DPs/BMS DCI/muffler delete/BC Extreme lows/OEM style 167s/BMS high side OCC/Mishimoto low side OCC/etc
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08-11-2014, 11:59 PM	#4
KLin Private First Class 6 Rep 135 Posts Drives: 2007 Monaco Blue 335i Join Date: Jan 2010 Location: San Diego iTrader: (1)	I've noticed the same thing in 2nd and 3rd. I'm on stock throttle setting Cobb Stage 1. __________________
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08-12-2014, 12:42 AM	#5
SteveAZ Captain 60 Rep 654 Posts Drives: 135i Cab Join Date: Jul 2012 Location: Phoenix, AZ iTrader: (5)	Yes, I've noticed that as well but I've pretty much narrowed it down to the fact that my tires are spinning or DTC is going nuts and pulling timing. __________________ 2008 E88--Fuel-It! Stage 4 LPFP & PI--PS2 turbos--JB4/MHD--FBO--662whp/604wtq 2011 E90--Fuel-It! S2BL LPFP and PI--PS2 Turbo--JB4/MHD--FBO--546whp/589wtq 2013 Mini JCW--Tune--DP--FMIC--a couple Fuel-It! goodies--265whp/320wtq 2013 F10--JB4/BM3 2015 F82--Fuel-It! Stage 3 LPFP & PI--PS2 Turbos-- JB4/BM3-FBO
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08-13-2014, 02:17 PM	#12
Carl Morris Captain 19 Rep 650 Posts Drives: 2008 335xi 6MT Join Date: Feb 2012 Location: San Jose, CA iTrader: (0)	I saw this thread the other day...I've experienced it myself but nothing came to mind. But then today I remembered that sometimes you get big timing pulls due to boost/load overshoot. I suspect that when you ease into the throttle you are less likely to have that happen.
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08-13-2014, 05:23 PM	#13
gtaccord Major 56 Rep 1,464 Posts Drives: 2009 BMW 335xi Join Date: Feb 2012 Location: Maryland iTrader: (7) Garage List 2009 BMW 335i xdrive [0.00]	Turn off your traction control.....
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