Knock Monitor

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Old Jul 5, 2011 | 03:41 PM
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Natural Aspirations's Avatar
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From: nothing is real unless it is observed
Default Knock Monitor

Im experiencing a bit of (from what I can hear) mid-load knock on my JRSC GSR. I am not currently running a Knock sensor but have the ability to do so IF anyone can confirm that the OEM knock sensor is a useful tuning tool.

I have attempted to use the OEM system in the past and it was detecting knock that was not there.

Ive seen homemade DET cans out of tubing and a pair of cheap ear protectors, but not sure on how accurate that method is.

Plugs look fine from what I can see

Thanks In Advance
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Old Jul 5, 2011 | 04:30 PM
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Default Re: Knock Monitor

J&S Safeguard
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Old Jul 5, 2011 | 06:07 PM
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Default Re: Knock Monitor

dont use "ear protectors" use mechanics stethoscope instead. much clearer sound. very easy to hear engine knock
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Old Jul 5, 2011 | 06:16 PM
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Natural Aspirations's Avatar
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Default Re: Knock Monitor

Originally Posted by welfarepc
dont use "ear protectors" use mechanics stethoscope instead. much clearer sound. very easy to hear engine knock

Just extend the tube?
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Old Jul 5, 2011 | 06:30 PM
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Default Re: Knock Monitor

Here another device for detecting knock http://www.phormula.co.uk/
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Old Jul 6, 2011 | 06:37 AM
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From: nothing is real unless it is observed
Default Re: Knock Monitor

Those are all nice devices but for me a little expensive. Keep in mind this is a hobby not a profession.

Sitting at work thinking about this it should be "relatively" easy and cheap to build something myself.

From what I gather a knock sensor is not much more than a piezo electric microphone, and should be really easy to amplify this to an audible level through a simple portable speaker for an iPod or through an unused RCA input on your car stereo.

I'm sure I'm over simplifying this and not thinking it through completely.
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Old Jul 6, 2011 | 07:01 AM
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Default Re: Knock Monitor

http://www.summitracing.com/parts/MSD-8964/?rtype=10

its worth the investment, to build one yourself you probably would have to be able to calibrate it so that you wouldnt read phantom knock
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Old Jul 6, 2011 | 07:22 AM
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Default Re: Knock Monitor

We shall see.... Spending $270 on something I'll rarely use is pretty much out of the question. Seeing as the MSD is not likely geared toward a Honda engine anyhow.
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Old Jul 6, 2011 | 08:03 AM
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Default Re: Knock Monitor

Originally Posted by YC Underground
Here another device for detecting knock http://www.phormula.co.uk/
got one of those and all i can say is it's more than worth it specially am a newb in tuning



plugged into Neptune too, egr lift input



adjusting it's engine bore dependent frequency parameter on the fly makes it's an all around tool.
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Old Jul 8, 2011 | 10:57 AM
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Default Re: Knock Monitor

i dont trust a machine. and i dont trust mics because of noise from amps. (edit; my user name is the other reason. budget before ballin)

thats why i like the mechanical stethoscope.



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