Difference between revisions of "Dyno Procedure"
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== Fully disable VSA with the pedal dance == | == Fully disable VSA with the pedal dance == | ||
| − | In order to not have the VSA system flip out when you're on a dyno or otherwise interfere with your results, | + | The pedal dance is meant for dynoing as it fully disables the VSA computer and any self-checks it performs. In order to not have the VSA system flip out when you're on a dyno or otherwise interfere with your results, it's recommended to do the pedal dance. |
| − | <big>'''If you do not | + | <big>'''If you do not disable the VSA computer, it may set an error code and disable itself, sometimes for over 30 minutes. The parking brake will no longer function and speed-based functionality on the radio will be disabled.'''</big> The cluster will cycle every error, much like when you flash a tune. You will have to either have a Honda tool to reset this or drive for over 20km until it randomly clears itself. Shutting off the car will require three presses of the ignition button. |
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| + | ''The state you end up in is not a dyno mode''. It is referred to by Kefi from FK8 Clinic as 'chassis safety mode' as the VSA computer has determined it can no longer trust itself to make corrections to the chassis. | ||
=== How to perform the pedal dance === | === How to perform the pedal dance === | ||
| − | Start with the parking brake engaged. Cycle VSA by holding the VSA button for two seconds until the VSA light turns on, and again until it turns off. | + | Start with the parking brake engaged, ignition on, but engine off. Cycle VSA by holding the VSA button for two seconds until the VSA light turns on, and again until it turns off. |
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| + | # Brake on, parking off, cycle vsa. | ||
| + | # Parking on, brake off, cycle vsa. | ||
| + | # Brake on, cycle vsa. | ||
| − | + | The VSA 'OFF' light should be ''blinking'' and you should now be forced into sport mode. Don't forget to release the parking brake before you start rolling on the dyno. This procedure must be restarted any time ignition is turned off and on - the 'OFF' light will no longer be blinking. | |
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| − | + | === Can't I just hold VSA for 10 seconds in R mode? === | |
| + | This doesn't appear to work for everyone, especially on AWD dynos. It's better to be safe than stuck without a parking brake for half an hour, so we recommend just following the full pedal dance procedure unless you must be in R mode. It's also widely believed that 'fully disabling' VSA in this manner doesn't actually disable the high speed cornering assist, so VSA is still ultimately on and watching for errors. | ||
== Heat soak will majorly impact results == | == Heat soak will majorly impact results == | ||
The FK8 ECU pulls a massive amount of power due to high IATs. Maximum boost starts getting reduced as early as 25C/77F but the power loss becomes significant at 140F. It is vital that you let the engine bay cool down before and in between runs. It is easy to lose well over 50 lbft of torque just by being heatsoaked at the start of the run. | The FK8 ECU pulls a massive amount of power due to high IATs. Maximum boost starts getting reduced as early as 25C/77F but the power loss becomes significant at 140F. It is vital that you let the engine bay cool down before and in between runs. It is easy to lose well over 50 lbft of torque just by being heatsoaked at the start of the run. | ||
Revision as of 16:35, 3 September 2020
In order to properly dyno the FK8 Type R, there's a couple things to be aware of.
Fully disable VSA with the pedal dance
The pedal dance is meant for dynoing as it fully disables the VSA computer and any self-checks it performs. In order to not have the VSA system flip out when you're on a dyno or otherwise interfere with your results, it's recommended to do the pedal dance.
If you do not disable the VSA computer, it may set an error code and disable itself, sometimes for over 30 minutes. The parking brake will no longer function and speed-based functionality on the radio will be disabled. The cluster will cycle every error, much like when you flash a tune. You will have to either have a Honda tool to reset this or drive for over 20km until it randomly clears itself. Shutting off the car will require three presses of the ignition button.
The state you end up in is not a dyno mode. It is referred to by Kefi from FK8 Clinic as 'chassis safety mode' as the VSA computer has determined it can no longer trust itself to make corrections to the chassis.
How to perform the pedal dance
Start with the parking brake engaged, ignition on, but engine off. Cycle VSA by holding the VSA button for two seconds until the VSA light turns on, and again until it turns off.
- Brake on, parking off, cycle vsa.
- Parking on, brake off, cycle vsa.
- Brake on, cycle vsa.
The VSA 'OFF' light should be blinking and you should now be forced into sport mode. Don't forget to release the parking brake before you start rolling on the dyno. This procedure must be restarted any time ignition is turned off and on - the 'OFF' light will no longer be blinking.
Can't I just hold VSA for 10 seconds in R mode?
This doesn't appear to work for everyone, especially on AWD dynos. It's better to be safe than stuck without a parking brake for half an hour, so we recommend just following the full pedal dance procedure unless you must be in R mode. It's also widely believed that 'fully disabling' VSA in this manner doesn't actually disable the high speed cornering assist, so VSA is still ultimately on and watching for errors.
Heat soak will majorly impact results
The FK8 ECU pulls a massive amount of power due to high IATs. Maximum boost starts getting reduced as early as 25C/77F but the power loss becomes significant at 140F. It is vital that you let the engine bay cool down before and in between runs. It is easy to lose well over 50 lbft of torque just by being heatsoaked at the start of the run.
