even if the aeroforce gauge does work(which i doubt it does) i wouldnt trust it because the aem is catching diffrent signals up to the port that normal....
the real only way to log knock would be thru the laptop or get an external knock sensor.....
in theory you could get a digital volt gauge and hook it up to read the voltage coming from the knock sensor and just monitor it in raw from
in theory you could get a digital volt gauge and hook it up to read the voltage coming from the knock sensor and just monitor it in raw from
This is not so clean cut as the knock sensor voltage will rise w/ rpms as voltage from just engine noise. To determine if its knock you would have to buffer that "noise" or useless voltage info out, something the factory electronics do very well.
The Aeroforce gauge will not work with the EMS, as there is no more ODB2 port to plug it into. The EMS converts the diagnostic port into a serial port to connect to the EMS.
You don't need anything extra to watch knock with the EMS. It's already a parameter that's easily available. You can add it to any list window, just unlock the list, click the one you want to change, and scroll until you see the knock options. I usually log knock #1 raw, which is the raw voltage coming off the stock knock sensor.
in theory you could get a digital volt gauge and hook it up to read the voltage coming from the knock sensor and just monitor it in raw from
This is not so clean cut as the knock sensor voltage will rise w/ rpms as voltage from just engine noise. To determine if its knock you would have to buffer that "noise" or useless voltage info out, something the factory electronics do very well.
right i know that.....but ifm you know the threshold the sensor see's when you know there is no knock then you will know what you are looking for
right i know that.....but ifm you know the threshold the sensor see's when you know there is no knock then you will know what you are looking for
Exactly right about the threshold voltage. The voltmeter mentioned above is a nice idea, but in practice, it won't work. Why? Because the voltmeter won't respond fast enough. Even if it did, you would have to be looking directly at it to see it. The knock shows up as a voltage spike, and it has a really short duration. The only real way to see it is by datalogging.
Below is a screenshot of my very first dyno pull with the EMS. That pull made some good numbers, but as you could see, the tune needed a lot of work, it was not safe at all. That dyno session is also when I found out I had piston problems... However, it gives you an excellent picture of what knock looks like. The only thing it doesn't show is the sensor noise increasing with the engine speed. My engine doesn't have a lot of noise, at least not with this particular tune. Snesor noise may show up better on a high speed internal log, which I haven't done, and is really what should be used for the knock sensor. But this screenshot will give you a good look at real engine knock. The knock line scale is from 0-4V.
get an AEM scangauge. it will replace your boost gauge and show all the parameters your AEM monitors/controls...afrs, timing, knock count, boost levels, oil pressure, egt (if you wire it up), IATs, etc
__________________
How absurd men are! They never use the liberties they have, they demand those they do not have. They have freedom of thought, they demand freedom of speech.
Actually, that's not a whole lot. You could only hear the one big spike happen. Most people talking about "I've got xx KR on my scangauge" have more knock than that. And it takes a lot more than what's on my screenshot to feel the car pulling timing on the stock/staged PCM's.
aeroforce gauge does not work with ems as stated, the best way to watch it is on the ems.you cant see it on a voltmeter.to actually see the knock you would have to have a scope on it.there is a ton of noise on the sensor.with a scope you would also see very high negative spikes which are noise so it would be pretty complex and confusing.
learn how to use the internal log, monitor knock #1 volts on one of the fast channels.you will see on the log that the knock voltage will steadily increase with engine rpm.what you want to look for is the spikes that come up above that.if you go to setup>sensors>knock sensor>knock sensor cal table>graph you can set the set the noise threshold above the actual noise so that your bunghole doesnt clinch up every time you open a log
__________________
email for price quotes/questions!!!
Email: Jay@N2MB.com
take a moment today to reflect on what happened on 11 september 2001...
get an AEM scangauge. it will replace your boost gauge and show all the parameters your AEM monitors/controls...afrs, timing, knock count, boost levels, oil pressure, egt (if you wire it up), IATs, etc
Actually, that's not a whole lot. You could only hear the one big spike happen. Most people talking about "I've got xx KR on my scangauge" have more knock than that. And it takes a lot more than what's on my screenshot to feel the car pulling timing on the stock/staged PCM's.
Chris
the only difference is the stock pcm would pull out a stupid amount of timing really fast lol.that screenshot was awesome i could actually see your rod bolts backing out
AutoForums.com is the premier network of enthusiast-owned
enthusiast-operated automotive communities.
We operate more than 100 automotive forums where our users consult peers for shopping information and advice, and share
experiences and opinions as a community.
What is the best way to watch for knock?
However, it gives you an excellent picture of what knock looks like. The only thing it doesn't show is the sensor noise increasing with the engine speed. My engine doesn't have a lot of noise, at least not with this particular tune. Snesor noise may show up better on a high speed internal log, which I haven't done, and is really what should be used for the knock sensor. But this screenshot will give you a good look at real engine knock. The knock line scale is from 0-4V.
Linear Mode
