Throttle cut - Revision history

Nyet: /* Getting rid of throttle cut */

2024-11-13T17:26:46Z

Getting rid of throttle cut

← Older revision		Revision as of 17:26, 13 November 2024
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	* Adjust the [[Tuning#Throttle cut\|ME7.1 requested load maps]] to prevent initial boost spikes, or numb the boost deviation thresholds. Alternately, the maps can be adjusted such that the requested boost is always at or above 200mbar below the hard MAP limit. In the latter case, it is ''strongly'' recommended that an MBC in parallel be used to prevent overboosting, since the ECU can not know how far above MAP limit the manifold pressure is.		* Adjust the [[Tuning#Throttle cut\|ME7.1 requested load maps]] to prevent initial boost spikes, or numb the boost deviation thresholds. Alternately, the maps can be adjusted such that the requested boost is always at or above 200mbar below the hard MAP limit. In the latter case, it is ''strongly'' recommended that an MBC in parallel be used to prevent overboosting, since the ECU can not know how far above MAP limit the manifold pressure is.

	* Use the "3/4" throttle mod (putting a stopper below the accelerator pedal), which prevents the driver from pushing the throttle to 100%. This, however, can also reduce overall power.		* Use the "3/4" throttle mod (putting a stopper below the accelerator pedal), which prevents the driver from pushing the throttle to 100%. This, however, can also reduce overall power (not recommended - fix your tune).

	* Use a [[manual boost controller]] in parallel to set a hard limit on the actual boost.		* Use a [[manual boost controller]] in parallel to set a hard limit on the actual boost (not recommended - fix your tune)

	* Use a [[throttle cut defender]] to "trick" the ECU into thinking the actual boost is lower than it is.		* Use a [[throttle cut defender]] to "trick" the ECU into thinking the actual boost is lower than it is (not recommended - fix your tune)

	[[Category:Tuning]]		[[Category:Tuning]]

Nyet: /* Getting rid of throttle cut */

2019-01-28T15:10:57Z

Getting rid of throttle cut

← Older revision		Revision as of 15:10, 28 January 2019
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	* Find and fix all possible electrical or mechanical causes of overboost - N75 failure, leaking or broken wastegate lines, broken wastegate actuators, etc.		* Find and fix all possible electrical or mechanical causes of overboost - N75 failure, leaking or broken wastegate lines, broken wastegate actuators, etc.

	* Adjust the [[Tuning#Boost_PID boost PID] properly. In particular, if you are modded, reduce KFLDIMX or recalibrate KFLDRL		* Adjust the [[Tuning#Boost_PID\|boost PID]] properly. In particular, if you are modded, reduce KFLDIMX or recalibrate KFLDRL

	* Adjust the [[Tuning#Throttle cut\|ME7.1 requested load maps]] to prevent initial boost spikes, or numb the boost deviation thresholds. Alternately, the maps can be adjusted such that the requested boost is always at or above 200mbar below the hard MAP limit. In the latter case, it is ''strongly'' recommended that an MBC in parallel be used to prevent overboosting, since the ECU can not know how far above MAP limit the manifold pressure is.		* Adjust the [[Tuning#Throttle cut\|ME7.1 requested load maps]] to prevent initial boost spikes, or numb the boost deviation thresholds. Alternately, the maps can be adjusted such that the requested boost is always at or above 200mbar below the hard MAP limit. In the latter case, it is ''strongly'' recommended that an MBC in parallel be used to prevent overboosting, since the ECU can not know how far above MAP limit the manifold pressure is.

Nyet: /* Getting rid of throttle cut */

2019-01-28T15:10:40Z

Getting rid of throttle cut

← Older revision		Revision as of 15:10, 28 January 2019
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	==Getting rid of throttle cut==		==Getting rid of throttle cut==
	* Find and fix all possible electrical or mechanical causes of overboost - N75 failure, leaking or broken wastegate lines, broken wastegate actuators, etc.		* Find and fix all possible electrical or mechanical causes of overboost - N75 failure, leaking or broken wastegate lines, broken wastegate actuators, etc.

			* Adjust the [[Tuning#Boost_PID boost PID] properly. In particular, if you are modded, reduce KFLDIMX or recalibrate KFLDRL

	* Adjust the [[Tuning#Throttle cut\|ME7.1 requested load maps]] to prevent initial boost spikes, or numb the boost deviation thresholds. Alternately, the maps can be adjusted such that the requested boost is always at or above 200mbar below the hard MAP limit. In the latter case, it is ''strongly'' recommended that an MBC in parallel be used to prevent overboosting, since the ECU can not know how far above MAP limit the manifold pressure is.		* Adjust the [[Tuning#Throttle cut\|ME7.1 requested load maps]] to prevent initial boost spikes, or numb the boost deviation thresholds. Alternately, the maps can be adjusted such that the requested boost is always at or above 200mbar below the hard MAP limit. In the latter case, it is ''strongly'' recommended that an MBC in parallel be used to prevent overboosting, since the ECU can not know how far above MAP limit the manifold pressure is.

	* Use [[Lemmiwinks]] to cut [[Lemmiwinks#SEL Scaling \| SEL Scaling]]. However, this also reduces maximum horsepower, so it is not the optimal solution. Also, in some cases it can exacerbate throttle cut, since the requested boost is now lower. If the actual boost remains just as high, there is a higher chance of deviation induced throttle cut.

	* Add back pressure to slow the ramp. If you are using open dumps or test pipes, try using a more restrictive exhaust system.

	* Use the "3/4" throttle mod (putting a stopper below the accelerator pedal), which prevents the driver from pushing the throttle to 100%. This, however, can also reduce overall power.		* Use the "3/4" throttle mod (putting a stopper below the accelerator pedal), which prevents the driver from pushing the throttle to 100%. This, however, can also reduce overall power.

Nyet: /* Getting rid of throttle cut */

2014-07-07T19:36:05Z

Getting rid of throttle cut

← Older revision		Revision as of 19:36, 7 July 2014
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	==Getting rid of throttle cut==		==Getting rid of throttle cut==
			* Find and fix all possible electrical or mechanical causes of overboost - N75 failure, leaking or broken wastegate lines, broken wastegate actuators, etc.

		⚫	* Adjust the [[Tuning#Throttle cut\|ME7.1 requested load maps]] to prevent initial boost spikes, or numb the boost deviation thresholds. Alternately, the maps can be adjusted such that the requested boost is always at or above 200mbar below the hard MAP limit. In the latter case, it is ''strongly'' recommended that an MBC in parallel be used to prevent overboosting, since the ECU can not know how far above MAP limit the manifold pressure is.

	* Use [[Lemmiwinks]] to cut [[Lemmiwinks#SEL Scaling \| SEL Scaling]]. However, this also reduces maximum horsepower, so it is not the optimal solution. Also, in some cases it can exacerbate throttle cut, since the requested boost is now lower. If the actual boost remains just as high, there is a higher chance of deviation induced throttle cut.		* Use [[Lemmiwinks]] to cut [[Lemmiwinks#SEL Scaling \| SEL Scaling]]. However, this also reduces maximum horsepower, so it is not the optimal solution. Also, in some cases it can exacerbate throttle cut, since the requested boost is now lower. If the actual boost remains just as high, there is a higher chance of deviation induced throttle cut.

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	* Use a [[throttle cut defender]] to "trick" the ECU into thinking the actual boost is lower than it is.		* Use a [[throttle cut defender]] to "trick" the ECU into thinking the actual boost is lower than it is.

⚫	* Adjust the [[Tuning#Throttle cut\|ME7.1 requested load maps]] to prevent initial boost spikes, or numb the boost deviation thresholds. Alternately, the maps can be adjusted such that the requested boost is always at or above 200mbar below the hard MAP limit. In the latter case, it is ''strongly'' recommended that an MBC in parallel be used to prevent overboosting, since the ECU can not know how far above MAP limit the manifold pressure is.

	[[Category:Tuning]]		[[Category:Tuning]]

Nyet: /* Definition */

2014-07-07T19:34:47Z

Definition

← Older revision		Revision as of 19:34, 7 July 2014
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	;ESP activity (a.k.a. traction control): The ECU senses that one or more wheels are losing traction. It does this if ESP is enabled and the ABS wheel sensors show a large discrepancy in wheel speeds.		;ESP activity (a.k.a. traction control): The ECU senses that one or more wheels are losing traction. It does this if ESP is enabled and the ABS wheel sensors show a large discrepancy in wheel speeds.
	;~~Boost~~ deviation: Actual boost pressure exceeds desired boost pressure by around 200-230mbar (3-3.3 psi). The ECU will only restore throttle angle once actual boost pressure falls to at or below the desired boost pressure.		;Negative boost deviation: Actual boost pressure exceeds desired boost pressure by around 200-230mbar (3-3.3 psi) for an extended period of time. The ECU will only restore throttle angle once actual boost pressure falls to at or below the desired boost pressure.

	==Examples==		==Examples==

Nyet: /* Getting rid of throttle cut */

2014-07-07T19:25:09Z

Getting rid of throttle cut

← Older revision		Revision as of 19:25, 7 July 2014
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	* Use a [[throttle cut defender]] to "trick" the ECU into thinking the actual boost is lower than it is.		* Use a [[throttle cut defender]] to "trick" the ECU into thinking the actual boost is lower than it is.

	* Adjust the ~~Motronic~~ ME7.1 ~~boost~~ maps to prevent initial boost spikes. Alternately, the maps can be adjusted such that the requested boost is always at or above 200mbar below the hard MAP limit. In the latter case, it is ''strongly'' recommended that an MBC in parallel be used to prevent overboosting, since the ECU can not know how far above MAP limit the manifold pressure is.		* Adjust the [[Tuning#Throttle cut\|ME7.1 requested load maps]] to prevent initial boost spikes, or numb the boost deviation thresholds. Alternately, the maps can be adjusted such that the requested boost is always at or above 200mbar below the hard MAP limit. In the latter case, it is ''strongly'' recommended that an MBC in parallel be used to prevent overboosting, since the ECU can not know how far above MAP limit the manifold pressure is.

	[[Category:Tuning]]		[[Category:Tuning]]

Nyet: /* Definition */

2014-07-07T19:22:11Z

Definition

← Older revision		Revision as of 19:22, 7 July 2014
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	==Definition==		==Definition==
	Throttle cut is any condition which causes the ECU to reduce the throttle ~~pedal~~ angle, even if the actual accelerator pedal potentiometer is at WOT.		Throttle cut is any condition which causes the ECU to reduce the throttle plate angle, even if the actual accelerator pedal potentiometer is at WOT.

	The two main causes of throttle cut are		The two main causes of throttle cut are

Nyet: /* Getting rid of throttle cut */

2013-03-01T17:52:09Z

Getting rid of throttle cut

← Older revision		Revision as of 17:52, 1 March 2013
Line 54:		Line 54:
	* Use the "3/4" throttle mod (putting a stopper below the accelerator pedal), which prevents the driver from pushing the throttle to 100%. This, however, can also reduce overall power.		* Use the "3/4" throttle mod (putting a stopper below the accelerator pedal), which prevents the driver from pushing the throttle to 100%. This, however, can also reduce overall power.

	* Use a [[~~master~~ boost controller]] in parallel to set a hard limit on the actual boost.		* Use a [[manual boost controller]] in parallel to set a hard limit on the actual boost.

	* Use a [[throttle cut defender]] to "trick" the ECU into thinking the actual boost is lower than it is.		* Use a [[throttle cut defender]] to "trick" the ECU into thinking the actual boost is lower than it is.

Nyet: /* References */

2010-08-09T20:31:42Z

References

← Older revision		Revision as of 20:31, 9 August 2010
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	* Adjust the Motronic ME7.1 boost maps to prevent initial boost spikes. Alternately, the maps can be adjusted such that the requested boost is always at or above 200mbar below the hard MAP limit. In the latter case, it is ''strongly'' recommended that an MBC in parallel be used to prevent overboosting, since the ECU can not know how far above MAP limit the manifold pressure is.		* Adjust the Motronic ME7.1 boost maps to prevent initial boost spikes. Alternately, the maps can be adjusted such that the requested boost is always at or above 200mbar below the hard MAP limit. In the latter case, it is ''strongly'' recommended that an MBC in parallel be used to prevent overboosting, since the ECU can not know how far above MAP limit the manifold pressure is.

	==References==
	* There is [http://forums.audiworld.com/s4/msgs/2271731.phtml evidence] that TC may also be triggered at the absolute [[MAP]] sensor "safe" limit of 1.5bar (around 2.8V).

	[[Category:Tuning]]		[[Category:Tuning]]

Nyet: /* Examples */

2008-08-05T17:13:17Z

Examples

← Older revision		Revision as of 17:13, 5 August 2008
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	!TIME\|\|RPM\|\|Throttle Plate Angle\|\|Boost Pressure Desired\|\|Boost Pressure Actual\|\|Deviation		!TIME\|\|RPM\|\|Throttle Plate Angle\|\|Boost Pressure Desired\|\|Boost Pressure Actual\|\|Deviation
	\|-		\|-
	\|497575\|\|4025.75\|\|99.6078431372549\|\|2327.109375\|\|2490.625		\|497575\|\|4025.75\|\|99.6078431372549\|\|2327.109375\|\|2490.625\|\|
	\|- style="background:green; color:white"		\|- style="background:green; color:white"
	\|497645\|\|4046.75\|\|100\|\|2315.1953125\|\|2508.90625\|\|193.7		\|497645\|\|4046.75\|\|100\|\|2315.1953125\|\|2508.90625\|\|193.7\|\|.9228\|\|1.084
	\|- style="background:orange; color:white"		\|- style="background:orange; color:white"
	\|497716\|\|4114\|\|100\|\|2302.1484375\|\|2503.0859375\|\|200.9		\|497716\|\|4114\|\|100\|\|2302.1484375\|\|2503.0859375\|\|200.9\|\|.9201\|\|1.087
	\|- style="background:red; color:white"		\|- style="background:red; color:white"
	\|497786\|\|4151.5\|\|99.6078431372549\|\|2271.1328125\|\|2508.2421875\|\|237.1		\|497786\|\|4151.5\|\|99.6078431372549\|\|2271.1328125\|\|2508.2421875\|\|237.1\|\|.9055\|\|1.104
	\|- style="background:orange; color:white"		\|- style="background:orange; color:white"
	\|497856\|\|4200.5\|\|45.8823529411765\|\|2263.1640625\|\|2488.203125\|\|225.0		\|497856\|\|4200.5\|\|45.8823529411765\|\|2263.1640625\|\|2488.203125\|\|225.0\|\|.9100\|\|1.099
	\|-		\|-
	\|497926\|\|4230\|\|43.921568627451\|\|2248.3984375\|\|2457.65625		\|497926\|\|4230\|\|43.921568627451\|\|2248.3984375\|\|2457.65625