Knock sensing on cars not equipped with knock sensors

[Accord2nrz]

That link doesn't work. Just lettin ya know

[Dzaster]

Link fixed. Thanks.

[Dzaster]

I got the TurboXS Knoclite today. Gonna put it in tommorrow. Will have some feedback and perhaps some pics or vids soon. Thanks Turbineguy again for the heads up on such a unit.

[CG10DET]

I've been looking at these also, so I'm interested to see what you have to say about it!

Remember not to trust it 100% it's an indicator and can give a false reading.

[Dzaster]

Yeah, I'm gonna go with the DIY/Ghetto audio kncok detector as well. Just to see if I do get knock if I can distinguish--and also to assist and confirm.

[Dzaster]

So it has been installed as of today. And set. Just has not been tested to see how well it works.
Contents;


Installed:


It wasn't set and I was driving around and all the lights were on in this thing.

I began the process ofsetting it up by programing the shift light, shift point first. Then I moved on to setting the 3 levels/RPM sensitivity ranges. First you set at idle, then you set at half of near redline, then last is near redline. All done while stationary, car in neutral.

After setting it I didn't go out as it was time to eat so called it a night. Will report later and have some vids for you guys as well. Hopefully just to see the shiftlight and no knock. I guess I could simulate some knock. We'll see.

[Dzaster]

Back with a my little creation of a knock listening device as well as some thought on sorting out some stuff with the TurboXS Knocklite going off at like 2700rpm--reporting supposed light knock.

First off, the knock listening device.


Seems to work just fine as I tested it real quick by clamping the mic to a exhaust manifold bolt/nut and had teh car idling. Could hear some clicking and what not. But as T-Guy stated, determinining what is knock/det over engine noise will be the challenge.


As for the TXS Knocklite, I did some light research on it on different forums and it seems that folks have had to play with teh sensitivity levels. Also, something I totally over looked. Since my motor doesn't come with a knock sensor I had to rig my own and ran the wire seperate of the harness. Well, I recently came to the realization that knock sensor wires are generally shielded within a harness so perhaps, its getting some excessive feedback.

I also bought a bottle of Lucas Octane Booster to see if it changes the characteristics of the knocklite's readings. Of course one thing at a time so can narrow it down to the actual problem--if there is a problem.

[Turbineguy]

Are the wires for the Knocklite run anywhere near plug wires, coils, or any crank triggers? If so look at a reroute or sheilding due to electrical noise from the ignition system. Also keep the wires away from the alternator.

[Dzaster]

Haha! Oh crap! I think the wire is tie strapped with the portion of the harness loomed for the alternator--however it is outside. It also runs throught the firewall with some other stuff hoses and wires.

I was gonna rewire it shielded anyways but will be sure its away from alt or igntion. Just gonna find me some appropriate cable.

[Dzaster]

So I've finished my little listening device completely and upgraded to some all-out headphones and added an extended battery pack.



I've actually used it over the past few days clamping it to the back of the block near the knock sensor. Seems to work nice to. The Knocklite has been going off when not in boost and when I really didn't think knock was present. So I listened with the knock listening thing and heard nothing, but same sound just a rise in RPM. Anybody care to share there thoughts sound clips on how it sounds?

Another thing, I thought that I had a slipping clutch because I was getting faint jerky acceleration--both in the seat of my pants and on the datalog. I thought it may have been the Knocklite because it taps into the ignition for an RPM signal. I disconnected it and no more jerky.

I think I need to find another source for RPM signal other than the ECU.

Also, using shielded wire for the knock sensor did nothing. Well, it still alerted of knock when none was present. Turning down the sensitivity actually did work. But I will set things up again once I find a different RPM signal for the Knocklite and confirm that it doesn't cause any jerky accel.