MS3x Knock Module Settings Thread
#44
DEI liberal femininity
Thread Starter
iTrader: (8)
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,338
Total Cats: 574
These are both lean tip in knock.
You can see in this one that the noise bled over into the next cylinder (or it also knocked maybe)
I would say you shouldn't rely purely on level. You have to use a sort of "know it when you see it" evaluation.
Of course if you HEAR the knock (like my lean tip in knock) then you know. I could hear it.
You can see in this one that the noise bled over into the next cylinder (or it also knocked maybe)
I would say you shouldn't rely purely on level. You have to use a sort of "know it when you see it" evaluation.
Of course if you HEAR the knock (like my lean tip in knock) then you know. I could hear it.
#49
I looked a t a log this morning, and the timing I have pulled is making an impact. I'm surprised by the number of knock events I was seeing below 100kpa. I was also seeing some when transitioning from higher kpa to lower kpa. I don't think the timing change was fast enough to avoid a knock spike.
The next question is.....Does one lone knock spike matter all that much when it happens over a fraction of a second.
y8's I'm noticing at high rpm and high boost that my knock signal is approaching what appears to be the max level 102.1% It doesn't look like knock, just an increase in signal strength. If I lower the gain in my settings, will it keep it from maxing out?
Oh, and I have turned off the knock retard so i can log the knock and try to tune it out.
The next question is.....Does one lone knock spike matter all that much when it happens over a fraction of a second.
y8's I'm noticing at high rpm and high boost that my knock signal is approaching what appears to be the max level 102.1% It doesn't look like knock, just an increase in signal strength. If I lower the gain in my settings, will it keep it from maxing out?
Oh, and I have turned off the knock retard so i can log the knock and try to tune it out.
#51
I am seeing this as well. I 2200rpm to 3100rpm at 68-80 kpa I'm down to 25 to 27. I was over 30. 42-50 kpa I'm right at 30 degrees
This seemed to be a big area where I ws getting knock, but I'm slowly tuning it out. I have a feeling I will end up lower than it currently is. Once I feel like I've tuned out the knock I will post a before and after of my ignition table.
This seemed to be a big area where I ws getting knock, but I'm slowly tuning it out. I have a feeling I will end up lower than it currently is. Once I feel like I've tuned out the knock I will post a before and after of my ignition table.
#53
Is there a way to estimate mbt. My original tune didnt have audible knock. I checked the pistons when i pulled the head, and i had no signs of det. Yet the knock sensor is definitely detecting something. If u back off the timing until the sensor stops detecting knock. Wheredoes this put you with respect to mbt? It appears to be an uber safe tune that you can flog without fear of blowing up. It probably also builds in a margin of safety if you go a little lean
#55
DEI liberal femininity
Thread Starter
iTrader: (8)
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,338
Total Cats: 574
does this give you warm fuzzies?
the map you don't like:
one you might like more:
Honestly I haven't messed with my spark map much in the last... 5 years. The original map I had was from FM for the hydra and was ridiculous.
the map you don't like:
one you might like more:
Honestly I haven't messed with my spark map much in the last... 5 years. The original map I had was from FM for the hydra and was ridiculous.
#57
DEI liberal femininity
Thread Starter
iTrader: (8)
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,338
Total Cats: 574
Here is running the second map. It's interesting to note that the noise level does not increase with RPM while I'm in boost
This is about 3700 to 5600 rpm. So a little higher RPM starting point, but the initial knock noise is much lower.
I take a lot of datalogs.
This is about 3700 to 5600 rpm. So a little higher RPM starting point, but the initial knock noise is much lower.
I take a lot of datalogs.
#58
Elite Member
iTrader: (2)
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,682
Total Cats: 130
Stop datalogging on arlington blvd or whatever that road is that has 25mph speed limit.
#59
I have my sensor installed and have been logging. I'm at work so I can't attach anything. I had a pretty nasty lean tip in knock, that went away- but I find that I am having to go very rich with the resolution I have in my AE chart. I will have to look at what others have.
I also notice a noise spike when I let off the gas and AE enters into the negative TPSdot. Anyone else see this? It will go from 20 to 40 when I let off the gas and then settle back down to 20, but not if I pulse the throttle.
I also notice a noise spike when I let off the gas and AE enters into the negative TPSdot. Anyone else see this? It will go from 20 to 40 when I let off the gas and then settle back down to 20, but not if I pulse the throttle.
#60
I'm working on setting up my knock setting on an NB running and MS3X (stock knock sensor)
This is on a mostly stock naturally aspirated engine.
I tried to systematically set up knock. I set the bandpass to the theoretical frequency of the miata bore size.
Then did two WOT sweeps at -5 and -7 degrees timing pulled from the stock MSPNPpro base map.
I assumed that these two pulls were very safe in timing and detestation free so I set my knock threshold slightly above the knock signal of those lines.
I then ran a pull with 8 degrees added at 3000 rpm to try and induce knock. The knock input was slightly over the first two pulls but not the magnitude I had hoped (no audible knock was detected).
I then tried 10 and 20 degrees added at 4000 rpm. Here, you can see a pretty sizable change in the knock signal but still not the magnitude that I had hoped to see.
After, I ran more pulls at of the basemap spark. These pulls seemed to be knock free, however, some points lie slightly above the knock threshold I set from the -5deg and -7 deg pulls...
I'm not sure If I should accept these as tiny knock events or if I should increase the threshold slightly that the baseline knock lines are below the KNK threshold?
Here is my current settings:
This is on a mostly stock naturally aspirated engine.
I tried to systematically set up knock. I set the bandpass to the theoretical frequency of the miata bore size.
Then did two WOT sweeps at -5 and -7 degrees timing pulled from the stock MSPNPpro base map.
I assumed that these two pulls were very safe in timing and detestation free so I set my knock threshold slightly above the knock signal of those lines.
I then ran a pull with 8 degrees added at 3000 rpm to try and induce knock. The knock input was slightly over the first two pulls but not the magnitude I had hoped (no audible knock was detected).
I then tried 10 and 20 degrees added at 4000 rpm. Here, you can see a pretty sizable change in the knock signal but still not the magnitude that I had hoped to see.
After, I ran more pulls at of the basemap spark. These pulls seemed to be knock free, however, some points lie slightly above the knock threshold I set from the -5deg and -7 deg pulls...
I'm not sure If I should accept these as tiny knock events or if I should increase the threshold slightly that the baseline knock lines are below the KNK threshold?
Here is my current settings: