S-AFR Response function

[isnms]

okay, for some reason i can't figure out how they mean to adjust this.

• do i increase the time to allow fuel longer
or
• do i decrease the time to add fuel sooner

here are all the explanations i can find about this adjustment:

Response Correction Function
1. Engine Response can be adjusted through airflow meter/pressure sensor. Range -1m/sec to 100 m/sec
2. Six points of adjustment between 650-5000 rpm , these points can be arbitrarily moved in 50 rpm increments
3. First in the industry to offer this function in a simple airflow correction device

The response function allows for management of engine response in milliseconds with six points of air meter signal adjustment between 650 and 5000 RPM that can be randomly moved in 50-RPM increments. This function is extremely valuable on applications such as high-lift camshafts, larger injectors or bigger turbochargers because of fuel requirements these modifications call for.

S-AFR Response Function
Q: What is being adjusted with the Response Funtion. What engine response would be changed; a lean hole or a rich stumble; by changing the response time. What effect does the response time have on engine performance.
A: The response knob has to do with the initial throttle input, that is, the initial pressing of the gas pedal. Many times with performance upgrades (exhaust, intake, headers, cams, etc...) air flow is increased without additional fuel being compensated for. The initial throttle input can sometimes stumble or hesitate a little due to not enough fuel to go along with the increase airflow. With the response knob, you can "richen" (add fuel) to go along with the extra airflow, this will help smooth out the vehicles throttle response.

• Response function
The engine's initial throttle response can be adjusted to improve driveability and over all performance. 6 adjustable RPM point settings between 650~5000 rpm that can be arbitrarily adjusted in 50rpm increments. RPM point setting values can be made between the range of 1m/sec.~100m/sec. in increments of 1m/sec.

RESPONSE SETTING
You can adjust the ratio of the response setting that has previously been inputted in the Response Adjustment Mode and in the initial setup. Use this operation to adjust the increased acceleration interval by depressing the Rsp knob and rotate to adjust all of the increased acceleration interval points.
In cases where the Default Response Settings are set as followed, the Rsp knob allows for fine tuning the fuel curve adjustments...
RESPONSE ADJUSTMENT MODE
For each of the 6 rpm points set between 650rpm ~ 5000rpm (arbitrarily adjustable in 50 rpm increments), the increased acceleration interval can be adjusted from 1~100ms (1/1000sec~1/10sec).

the last one includes the example table below:

 

[Clifton]

I found these.

The response function, similar to the one in the VPC, allows for adjustments to the fuel settings upon throttle inputs to improve driveability and performance. Much like the corrections made to the idle mixture to compensate for high-lift cams and/or larger injections, the response function can also compensate for differences in fuel requirements upon initial throttle input as airflow characteristics are changed from high-lift cams, larger injectors, and bigger turbos.

In detail, the response function allows for management of engine response in milliseconds with six points of air meter signal adjustment between 650 and 5000 RPM that can be randomly moved in 50-RPM increments


And this

Q: What is being adjusted with the Response Funtion. What engine response would be changed; a lean hole or a rich stumble; by changing the response time. What effect does the response time have on engine performance.

A: The response knob has to do with the initial throttle input, that is, the initial pressing of the gas pedal. Many times with performance upgrades (exhaust, intake, headers, cams, etc...) air flow is increased without additional fuel being compensated for. The initial throttle input can sometimes stumble or hesitate a little due to not enough fuel to go along with the increase airflow. With the response knob, you can "richen" (add fuel) to go along with the extra airflow, this will help smooth out the vehicles throttle response.

Thanks

HKS USA

 

[isnms]

okay, this is what i found on the VPC's response setting:

Response - If turned clockwise, will increase the fuel on the initial opening of the throttle and less fuel when released. If turned counterclockwise, will decrease the fuel on the initial opening of the throttle and more fuel when released.

NOTE: If the response volume is turned clockwise to much, the VPC will be fore sensitive to the ON and OFF of throttle, which may cause hesitation.

Response (works like an accelerator pump)

 

[isnms]

I still have a stumble.
I have my response setting like the right side of the table posted in the image attached to the first post.

The initial throttle input can sometimes stumble or hesitate a little due to not enough fuel to go along with the increase airflow. With the response knob, you can "richen" (add fuel) to go along with the extra airflow, this will help smooth out the vehicles throttle response.

To "richen"; Do I raise (clockwise) or lower (counter-clockwise) my millisecond setting [ increased acceleration interval ] for the selected response rpm point?

 

[isnms]

I may have fixed it.

I observed that it stumbled when the EIDS was active. EIDS is to compensate for atmospheric bov. I have dual bov - atmospheric and recalculation. I turned off the EIDS function and did not notice the stumble any more. :x: