Knock sensor
- Thread starter 65coupei6
- Start date
Front US passenger side head bolt by the water pump. The Australian 1986 Alloy Head II carb and EFi has a 0.875 inch taller bolt that fits the E6 Bosch knock sensor. Its tuned into the resonant frequency of engine detonation, based on the formula
See "https://fordsix.com/threads/knock-sensor-s.76154/"
And "https://stangnet.com/mustang-forums...e-the-pig-is-in-the-pen.871263/page-323?amp=1"
In terms of bore, the knock frequency can be greatly influenced.
Approximated using :
900/(Pi * r) where r = the radius of the bore in Sillymeters, um, millimeters.
Given a bore of 76mm the knock frequency will be 7540 Hz.
A bore of 3.700" or 93.98 mm, the knock frequency will be 6100 Hz
A fat bore Chevy or Ford with 4.00" bore, its down to 5600 Hz, with the very smooth combustion of a wedge head dragging its audiability down to a 5200 Hz threashold.
See "https://fordsix.com/threads/knock-sensor-s.76154/"
And "https://stangnet.com/mustang-forums...e-the-pig-is-in-the-pen.871263/page-323?amp=1"
In terms of bore, the knock frequency can be greatly influenced.
Approximated using :
900/(Pi * r) where r = the radius of the bore in Sillymeters, um, millimeters.
Given a bore of 76mm the knock frequency will be 7540 Hz.
A bore of 3.700" or 93.98 mm, the knock frequency will be 6100 Hz
A fat bore Chevy or Ford with 4.00" bore, its down to 5600 Hz, with the very smooth combustion of a wedge head dragging its audiability down to a 5200 Hz threashold.
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What I did was weld together a knock senser sized nut to a head stud sized nut, there was enough stud threads protruding past the head stud nut that everything tightened down tight.
Do you happen to have a picture?
Not at this time, but when I do, I am going to be a picture posting fool. Just imagine two nuts lined up on top of each other and welded together with the holes centered. I used a smaller bolt to hold them together while I tig them, just don't overdo the weld and mess up the threads.
