crank fluctuation sensor and knock sensor in neptune
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B*a*n*n*e*d
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From: sea,WA in my car
crank fluctuation sensor and knock sensor in neptune
since most people buy obd2 oil pumps anyway when they build their b series. can the crank sensor be wired up to the input of demon board and will it be any use for datalogging say if you are trying to troubleshoot something?
does the crank sensor detect crank vibration from unballanced rotating assembly or it only detects the misfire?
i was thinking that since detonation causes pinging which is much louder than normal engine operation it should stad out on a waveform datalog even with knock sensor attached directly to demon board. there shouldnt be need for knock board but for tuning purposes wouldnt it benefit the tuner?
and leave an option to calibrate the knock sensor once its on the dyno that way it will flash a sign or something when the knock is detected after calibration?
does the crank sensor detect crank vibration from unballanced rotating assembly or it only detects the misfire?
i was thinking that since detonation causes pinging which is much louder than normal engine operation it should stad out on a waveform datalog even with knock sensor attached directly to demon board. there shouldnt be need for knock board but for tuning purposes wouldnt it benefit the tuner?
and leave an option to calibrate the knock sensor once its on the dyno that way it will flash a sign or something when the knock is detected after calibration?
Re: crank fluctuation sensor and knock sensor in neptune
Knock sensor directly to the board won't do anything since the voltage output is tiny. It's just a piezo mic and needs to be amplified to make any useful signal. Theoretically you could build some sort of mu-controller based device that could turn the signal into a useable 0-5V output for use by the Demon.
I'm planning on picking up a Knocksense unit sometime this winter to play around with, the megasquirt version has two logic outputs, one goes high (5V) when knock is detected and one goes low (0). You could use either of those as a knock marker in your logs, a knock would just show up as a step function. You would have no way of observing magnitude or count though really.
The ckf could be logged with a bit of work too, it would take an external controller of some kind to compare it to the ckp and determine when you have a misfire, that is pretty much what it does on the obd2 ecus.
I'm planning on picking up a Knocksense unit sometime this winter to play around with, the megasquirt version has two logic outputs, one goes high (5V) when knock is detected and one goes low (0). You could use either of those as a knock marker in your logs, a knock would just show up as a step function. You would have no way of observing magnitude or count though really.
The ckf could be logged with a bit of work too, it would take an external controller of some kind to compare it to the ckp and determine when you have a misfire, that is pretty much what it does on the obd2 ecus.
I'm Huge In Japan
Joined: Apr 2008
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From: the 615
Re: crank fluctuation sensor and knock sensor in neptune
CKF is almost exclusively for verifying your timing belt isn't off. Use the knocksense, if you set it up right it'll work perfectly.
The Knocksense MS 5v output works with Neptune and Hondata, use it as an input to trigger secondary maps. Depending on the setup it can be a little jittery but it could save your engine.
The Knocksense MS 5v output works with Neptune and Hondata, use it as an input to trigger secondary maps. Depending on the setup it can be a little jittery but it could save your engine.
Honda-Tech Member
Joined: Jul 2004
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From: Quakertown, Pa, USA
Re: crank fluctuation sensor and knock sensor in neptune
CKF is almost exclusively for verifying your timing belt isn't off. Use the knocksense, if you set it up right it'll work perfectly.
The Knocksense MS 5v output works with Neptune and Hondata, use it as an input to trigger secondary maps. Depending on the setup it can be a little jittery but it could save your engine.
The Knocksense MS 5v output works with Neptune and Hondata, use it as an input to trigger secondary maps. Depending on the setup it can be a little jittery but it could save your engine.
Re: crank fluctuation sensor and knock sensor in neptune
You can’t use the Knocksense that way unfortunately. It has no learn up/learn down functionality. The only thing you can do with it is log when there is knock. Look into the TunerNerd knock controller. You can use it with NepTune’s sensor adjustment or with Hondata’s traction control input to retard for knock.