PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Is this burst knock? Log, tune and config inside

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Old May 6, 2012 | 10:13 AM
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Default Is this burst knock? Log, tune and config inside

Rear mount running about 3-4 lbs on just wastegate. Most of the knock i see seems to be when initial boost kicks in. Mostly stock timing with minor adjustments in some boosted areas ( no cam or heads) Running 48lb injectors and aero stealth pump. 93 octane. Car felt real strong during this logging session. I know there is still some tuning to be done on the ve table.

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Last edited by bwy23; May 6, 2012 at 10:19 AM.
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Old May 6, 2012 | 10:28 AM
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When I view that log it's showing knock retard, and not burst knock.
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Old May 6, 2012 | 11:11 AM
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ok...ive read some. I thought the burst knock would show on the regular histogram. my mistake. Still seems like its happening when boost kicks in or on the shifts.
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Old May 6, 2012 | 11:22 AM
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Try getting your VE dialed in more at WOT. Not much harm in backing down the timing until you get the rest of the tune inline. Looks like you are shooting at mid 11's and bombing down to under 10 sometimes. I can't imagine the pulls feel smooth.
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Old May 6, 2012 | 11:53 AM
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so what would you suggest the timing to be at under boost while im leaning out the top? Maybe -3 degrees from 3200 up?
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Old May 6, 2012 | 12:17 PM
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I think factory timing through peak torque is like 23 degrees. I'd probably start with 18. See where that puts you.

Let me add that I would ramp timing up to 18. Not just flat from the boost threshold.

Last edited by Brad Campbell; May 6, 2012 at 12:31 PM.
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