Watch the demo here and listen to examples of knock here!
The Knock Detective is an audio knock detection device stuffed into a 52mm gauge. After bolting the included knock sensor(s) to your engine and connecting the Knock Detective, you can plug in headphones and listen for knock events while tuning. The device also features a bright LED display with configurable sensitivity to help visually monitor knock levels. The user can then connect the 0-5V output to an analog input on their ECU and use it to datalog the knock levels.
Now available with the new MV Gauge Holder for the NA & NB MX5/Miata - fit your Knock Detective right into your vent!
I hope you enjoy this product which I have designed and hand built in Saint John, NB, Canada.
Features:
- Standard 52mm gauge with 2 knock sensor inputs.
- Comes with wideband knock sensor(s) with 8' shielded cable(s)
- 6 LEDs to indicate knock signal level
- Adjustable sensitivity
- Headphone output for listening to the knock signal
- Adjustable volume
- 0-5V output for data-logging
- 3D Printed in high strength ASA
Reviews
I absolutely love this device, i was experiencing knock because of a valve head been resurfaces too many times and melting pistons. With the knock detective I could figure this out and replaced the valve head, do some tune myself and keep my engine alive and not breaking anymore.
I have it installed on my Datsun 150Y Sunny Drift Car with an S14 Sr20det with a Racetec R1000 Repro ECU.
If you have ever installed a car stereo, you already know how to install this, super easy to fit and use. :D
The device ive been waiting for years, very satisfied with the performance and quality, the audio output and 0-5v output for datalog works great. As a tuner/wiring technician is a must device on almost every car that i work, tested on street, drift, track and off road use and abuse, every device works perfectly 👌🏽
really good device together with dragy. I increased the advance as long as the acceleration improved by 100-200 kph and at the same time I listened to the knock. The results really improved. 100-200kph is now 5.03 sec. Best E.T 1/4 mile is 10.66/219kph.
4cyl toyota Beams engine. 2000cc
Really like mine! I use it to tune customer cars so i made a quick cigarette ligther adapter for it, you can clearly hear the raw engine sound as well as knocking events! Mr fwlr wuickly replaced mine because unfortunatelly the fordt unit damaged due to overseas shipping . Customer satisfaction 5stars! Thanks for it 🥰
Install on my R swapped 98 v70xc was quick and easy. its an essential tool for tuning safely, especially when the best you can get locally is 91 or 93.
note- when trying to record audio into reaper my laptop would default to the onboad mic and not the gauges audio signal, problem was solved using a cheap usb audio interface and audio is crisp and clear(behringer um2 was what i used).
110% would buy again
Having a 30 year old Jap car the OEM knock detection system is not really trustworthy, especially when you start pushing power out of the car. Without the knock detective I would need to settle for a conservative tune otherwise I would risk severely damaging the engine. With the knock detective I can squeeze as much power out of the engine as safely as possible, and be confident in the fact that I know the engine isn't knocking. This gauge is a must have!
This thing absolutely works as advertised. I’ve got a high compression built motor in my Miata and I was nervous about knock on crap 91 pump gas. Installed this, and sure enough it was knocking away. Instead of losing power I decided to switch to e85 and the knock went bye bye. It’s pretty cool to both hear and see the knock! This thing rocks!
Very usefull device. I had a GT500 that does not have the knock sensors. Installed this device and can tune the car properly. Also useful for other cars tuning - you can listen to the knocking sound via headhpones.
Only drawback is the material - you can see it is a 3d print, but it is not a huge problem.
I am using dta fast as ecu for all my engines. And this device helped me out to control knock. And listening to it. The 5v output is that kind handy that you can log or do with it what you want. It works so godd damm good!
Not only is this the most affordable “knock ears” you can get but - you need it. But also a super cool design that works. Love how the gauge face is actually the back on the PCB. Nerds DO go faster!