Knock Sensors

[Vishnuatepork]

I am looking at putting a knock sensor on my bike, as it seems it will be a valuable tool to help with timing and tuning.  I was wondering A) what gases are available at El Miarge, B) does anyone have any preferred knock sensors for bikes?

Lastly, I have spent some time perusing some of the the motorcycle forums to see what others say about brand/make, a couple of time I have read that they are ineffective over 4k rpm.  Can anyone confirm or deny this?

Cheers everyone!
Alan

[maj]

I tried a "knock link " from Link in NZ , but it performed more like a tach, the 4 led lights progressively lit up as rpm increased, at any boost level , mounted on the side of the block , trying to keep some distance from the valve gear .

[Bob Drury]

  Vis, I don't know about motorcycle applications, but I talked to MSD about their automobile knock sensors, and they said they are not meant for racing, the noise and vibrations will set them off.  Bob

[SlyOneJr]

From experience on my old 1978 Pinto with a 1988 TurboCoupe motor in it, if I ran the Pinto with the knock sensor hooked up, I would lose 3 tenths of a second and 4 mph in the 1/8th mile. Seems that most knock sensors can't tell the difference between detonation and the normal sound of an engine hitting it's 7500 rpm redline.