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Old 03-17-2015, 12:17 AM   #1
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Default Knock during startup and warmup normal?

My megalog viewer shows knock in all cylinders around 3.6-4 during warmup. During startup, I get crazy amount of knock in the 30s, but this event only lasts for a second or two. Is this normal?

I'm not sure how sensitive the MS3 is but are all logs supposed to read 0 knock at all times?

Should I be really concerned? My timing is very conservative and I've tuned fixed tables.

Rev MS3, 2003 Miata all stock.

I've attached a startup and die log (Idledie) and my tune. I'm hoping I can get some input here.

I'll have the warmup log soon, my current one is a bit too big.

Not sure why I'd be knocking with my settings.
Attached Files
File Type: msq MiataFinal.msq (213.2 KB, 87 views)
File Type: msl Idledie.msl (92.3 KB, 39 views)
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Old 03-18-2015, 10:04 AM   #2
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"Knock" readings on startup may actually be measuring piston slap until the pistons get up to operating temperature.
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Old 03-18-2015, 03:11 PM   #3
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I'm still getting knock at ~3.6-4.0 during regular driving in ALL cylinders. They seem to move with each other. Is this normal? Should I be worried about knock at these levels?

Thanks.
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Old 03-18-2015, 03:24 PM   #4
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This is just noise. I wouldn't worry about knock below 15-20%.
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