NICOclub

The Nissan and Infiniti enthusiast community - Repairs, modifications, resources and much more!

Search NICOclub.com

search
  • Nissan Forums
  • Infiniti Forums
  • Truck & SUV Forums
  • Datsun Forums
  • Marketplace
    • Advertise on NICOclub
    • Advertisers Directory
    • Fabricators’ Marketplace
    • Classified Ads
  • PRODUCT REVIEWS
  • TEST DRIVES
  • SERVICE MANUALS

DIY Knock Detection

May 30, 2011 by WDRacing

I was scouring the web in search of some affordable knock detection sensor, most products costing more then I cared to spend usually in the $200 to $600 range. I couldn’t believe how limited most of the products were for the amount of money they were charging. Essentially everything was a box that had some LEDs and a speaker for an alarm.  Here’s some info on making a DIY knock detection device with a whisper 2000.

The case is opened by removing 3 self tapping screws. This reveals the “guts” of the whisper2000.

The mic is then removed from whisper2000, rewired to 5-10 feet of ext wire, and then glued onto a alligator style clip.

The clip is then placed somewhere on the engine to best detect knock. On the KA the clip should be placed as close as possible to the factory knock sensor. You’re then able to listen for knock via headphones.

This method looks and sounds crude, but I have read nothing but rave reviews of how well it actually works. Guys with data logging software are able hear knock before the factory knock sensor registers any. Of course for those of you that don’t want to use headphones, you could always connect the whisper2000 to an alarm and LED.

Now after some browsing and brainstorming I found this.

For $30 bucks plus a headphone extension cable, we get a unit with a self contained mic which removes all the BS involved with the above whisper2000. If I can buy a unit that lets me avoid soldering, I’m going to.

With this unit I believe we can attach it right under the intake manifold with the mic right over the knock sensor. This should give us a good signal, remove the need to rewire anything and the price is a hell of a lot better then the other knock monitors on the market that range from $200 to $600 and don’t do much besides turn on a light and make noise.

Also, if you want to data log the “knock” you can get a headphone splitter and connect another 3.5mm cable directly to your Line In slot on your sound card, it’s usually marked in blue with the line out marked in green.

Then simply select “start”, type the word ‘sound’ in the search box and Sound Recorder should be one of the choices. Select Sound Recorder and then click record when your ready to start.

http://audacity.sourceforge.net/ is a very good freeware as well.

Enjoy!

Written by WDRacing

 

Filed Under: Tuning Tagged With: Detonation, detonation control, knock control, knock sensor

Search NICOclub.com

search

Sponsor

Nissan Infiniti Online Forums Nissan 240sx technical information Nissan technical information Infiniti technical information Nissan Infiniti Road Tests and Reviews Nissan Infiniti Related Articles Nissan Infiniti Technical Information Articles Nissan Infiniti Events and Shows

Sponsor

Recent News

Misfire or CVT Failure? Diagnosing Hesitation on a 2016 Infiniti QX60

Troubleshooting A/C Issues on a Nissan Altima: Tools, Diagnosis & Tips

How to Avoid Buying a Stolen Car: Essential Tips for Ohio Buyers

NICOFest Carlisle 2025 Recap!

NICOFest Carlisle 2025 Results

Is It Worth Buying a Car After a Taxi or Car Sharing?

The Resurgence of Classic Cars: A Look at Why Vintage Automobiles Are Back in Demand

The First Step is Always the Hardest

Sponsors

Sponsor



!YL Tag

NICOclub's Nissan forums and Infiniti forums and all affiliated sites are the property of HDS Holdings, Inc. They are independent publications and are not affiliated with or endorsed by Nissan or Infiniti. Information Copyright © 2000-2025 by NICOclub, all rights reserved. Material may not be copied or reprinted without written permission.

NICOclub Sitemap | NICOclub Privacy Policy

Copyright © 2025 · NICO Club 2014 on Genesis Framework · WordPress · Log in