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Knock knock!! :(

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Old Aug 9, 2009 | 09:59 PM
  #1  
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St. Jude Donor '12
Default Knock knock!! :(

Well today I was out for a ride and was not happy. I recently got my meth kit all hooked up and working.

Took the car out and did a 3rd gear pull and started to get knock @ 4500-5000 rpm. I was like WTF!!! I never had knock before.

I did log the pull and normally I am running 11.1-11.2 afr across and 15* of timing.

Now w/ the meth spraying I was seeing 10.3-10.5 afr.

I mixed the stuff up according to Alcohol Injection System's website. One gallon of -20 washer fluid and 4 bottles of Heet to give me a 50/50 mix of water and meth.

I don't understand why it would do this.... I have a 20gph nozzle spraying into the intake, AFTER the MAF.

Any ideas?
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Old Aug 10, 2009 | 07:41 AM
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I have heard of knocking due to too much fuel, but those AFR's don't seem like enough to put it in that category. Are you hearing it or just registering it on your logs?
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Old Aug 10, 2009 | 08:23 AM
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Both.. Very audible.

As soon as it started I pulled outta the throttle. I did another pull and it happened again.
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Old Aug 10, 2009 | 08:39 AM
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Lose the mix...
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Old Aug 10, 2009 | 08:52 AM
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what should i run through it?
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Old Aug 10, 2009 | 08:57 AM
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Pure M1 meth
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Old Aug 10, 2009 | 09:10 AM
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I'm running pure M1 meth. No issues.
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