JohnC

Tuning L99 for Heads, Cam, Exhaust, Converter, etc.

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145 posts in this topic

20 hours ago, 66sprint6 said:

NOPE!  BUT...you will get quicker for it which is a plus!!!

Matt

and possibly divorced...Guess that could go either way on the plus/minus scale :D 

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On 5/23/2018 at 4:11 PM, gammey4 said:

Yes it is just predicted spark knock.

Where do I go to turn off burst knock again?

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Where do I go to turn off burst knock again?

Spark>retard>knock retard cylinder delta air vs temp. Just zero out the air values for now. Burst knock is there to account for rapid air changes, such as throttle opening, and it predicts a lean condition. It pulls timing to protect the engine from a lean condition since air reacts faster than fuel.

Clean up your channels list and log burst knock and you can see how much timing it is or isn’t pulling. There is a lot of rain in the forecast but let me know when you can make it to the track.

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Don't see the exact path... can you get it off this screen shot?

knock_retard.jpg

Base vs cylica air

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2 hours ago, gammey4 said:

Spark>retard>knock retard cylinder delta air vs temp. Just zero out the air values for now. Burst knock is there to account for rapid air changes, such as throttle opening, and it predicts a lean condition. It pulls timing to protect the engine from a lean condition since air reacts faster than fuel.

I like reading/learning the "logic" behind the programming.

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Looks like that one was already zero'd out... :???: 

BKR_Cyl_Air.jpg

Are you logging burst knock?

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13 hours ago, gammey4 said:

Are you logging burst knock?

I'm logging:

Knock Retard

Total Knock Retard

Knock Learn Factor

Burst Knock Retard

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Looked at your tune, are you removing timing from your low octane table as well? Your tuner has the low and high octane tables the same.

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3 hours ago, gammey4 said:

Looked at your tune, are you removing timing from your low octane table as well? Your tuner has the low and high octane tables the same.

I didn't even look at the low octane...

Yup, you're right. Don't know how I screwed that up! :lol:

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Copy your current high octane to your low octane table. Every time you make a change do the same until your knock is gone. Then subtract 4 degrees from your low octane table.

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3 hours ago, gammey4 said:

Copy your current high octane to your low octane table. Every time you make a change do the same until your knock is gone. Then subtract 4 degrees from your low octane table.

Will do! :up:

 

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Will do! :up:

 

And to make everything easier, go back to 93 and tune your main spark table from there. Trying to tune it while running e85 is backwards unless you will never put regular gas back in it. And zero out all your spark adders.

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