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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Negative Timing



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      04-20-2019, 07:37 AM   #1
DiFFv1
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Negative Timing

So i haven't really found a updated thread on this. But i want to gain a bit more knowledge than what i have read from the recent posts.

Question: Whats considered really bad negative timing (Example: -3.0 / -5.3)

And whats the norm with slight adjustments? If this makes sense..

I appreciate your feedback and info
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      04-20-2019, 01:37 PM   #2
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Quote:
Originally Posted by DiFFv1 View Post
So i haven't really found a updated thread on this. But i want to gain a bit more knowledge than what i have read from the recent posts.

Question: Whats considered really bad negative timing (Example: -3.0 / -5.3)

And whats the norm with slight adjustments? If this makes sense..

I appreciate your feedback and info
I assume you mean timing corrections. Anything over 3 degrees on a semi consistent basis and you should increase octane or make the tune less aggressive. If you're having 3 degree pulls across all cylinders at the same time would be another time to look at octane or tune changes.
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Last edited by Turbod; 04-21-2019 at 12:09 AM..
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      04-20-2019, 04:16 PM   #3
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Quote:
Originally Posted by Turbod View Post
Quote:
Originally Posted by DiFFv1 View Post
So i haven't really found a updated thread on this. But i want to gain a bit more knowledge than what i have read from the recent posts.

Question: Whats considered really bad negative timing (Example: -3.0 / -5.3)

And whats the norm with slight adjustments? If this makes sense..

I appreciate your feedback and info
I assume you mean timing adjustments. Anything over 3 degrees on a semi consistent basis and you should increase octane or make the tune less aggressive. If you're having 3 degree pulls across all cylinders at the same time would be another time to look at octane or tune changes.
Thanks i appreciate that, I know most is fuel related
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