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With a properly implemented water/methanol injection system, you should be able to arrive at maximuum power AFR and MBT without ever experiencing knock.
I tune without water injection to the threshhold of knock and then pull back a bit to find my base tune that I revert to in the case of a WI system fault. Generally I only monitor for knock during tuning - I use this: http://home.netcom.com/~bsundahl/kno...nockSounds.htm And the DIY knock cans: http://home.netcom.com/~bsundahl/kno...ten/listen.htm I attach this to my tuning computer while tuning. Of course I am relying on my ECU's knock sensing / timing retard response if I cross the edge somehow. |
Thanks, that seems the easiest to use and I could just keep an ear peice in whilst tuning and listen out for anything unusual. Would be a very nice facility and peice of mind whilst tuning. Where would you recommend putting the mic? I have a V8 so would it be possible to bolt it onto the inlet manifold?
Thanks again really pleased with that suggestion as it would be very cheap, Phil :lol: |
This particular DIY relies on a factory knock sensor and taps into its signal. I use my laptop amplifier to listen in.
Another DIY that includes information on building one with a microphone - http://www.autospeed.com/cms/article.html?&A=0353 If you do not have a factory knock sensor the mechanical one brad mentioned also works very very well and likely would be easier than building one with a microphone unless you already have the audio electronics skills. You can get a stethoscope and tubing routed to a 4" copper tube with 2" flattened and a hole in the end for bolting to the engine. The intake may work but attaching to the block would be preferable. |
I made that DYI unit it works great and it is very cheap to make, try radio shack.
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