AFR, VE, Timing chart review before dyno tune - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 06-09-2013, 10:42 AM   #21
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Corrected:

Quote:
Originally Posted by hornetball View Post
Using a dyno to tune fuel is a huge waste of money (unless the car is not street legal or you live in Maine).
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Old 06-10-2013, 08:52 AM   #22
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Here is the spark maps to compare. The top map was my starting map from Rev (good map). The bottom map is my tune map.

Note: the boost values are different
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AFR, VE, Timing chart review before dyno tune-spark2.jpg  
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Old 06-10-2013, 09:21 PM   #23
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I had a map that looked like your final map a while ago. I was told that it looked like I took the spark map from a smallblock chevy. Well, I had created my spark table based on my Mopar 440 pushrod V8. Your map looks like a pushrod V8 default map that was then modified based on your detcans. I don't really know what should be run anymore. It seems many are now saying you can run a lot more timing in the non boost cells. I tuned mine based on my MS3 knock sensor. I pulled timing out of cells that in the past I would have considered absurd. However, when I reduced the timing, the knock spikes went away. I'm mentioning this because I'm surprised at how close my spark table is to your original spark table that was created by a very knowledgeable person.

You may want to run a hybrid of the two. Keep your newly tuned cells, but revert back to the Rev non boosted cells. Your 210kpa from 3100 to 4300 worries me a bit.



Attached Thumbnails
AFR, VE, Timing chart review before dyno tune-djp0623-11604-albums-my-build-2-202-picture-spark-table-6-10-13-3280t.jpg   AFR, VE, Timing chart review before dyno tune-djp0623-11604-albums-my-build-2-202-picture-spark-table-6-10-13-3280.jpg  

Last edited by miatauser884; 06-11-2013 at 10:59 AM.
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Old 06-11-2013, 08:53 AM   #24
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I too think Rev gave me a very good map to start with. I'm having issues with the MS3 knock settings and can’t seem to get any help or advice. I can’t trust the knock sensor because the signal is all over the place (even with the base spark map). It's all over the place and I can't get any real readings because all it shows are spikes from beginning to end.

I did find that in the areas that I was having knock (from Det can) that after I reduced the timing I was very close to the original settings from Rev. I find that in the non-boosted areas of the map more timing was available and seems to run very smooth.

As for the 210kpa area, I'm not really getting to that high of boost to use it, I'm at 11psi at the moment, so I'm only around 180kpa.

djp: Would you mind sharing your knock sensor settings with me for comparison, I must have something set differently than yours? (I'm using the stock MSM sensor)
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Old 06-11-2013, 10:57 AM   #25
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I'll take a snap shot of my knock sensor settings. I too am using the NB sensor. Post a screenshot of a knock sensor log. I miswired mine initially and it gave me nothing but garbage.

I would lower the timing in your higher kpa ares if you aren't getting there just in case of an overboost situation.

y8s or joe parez has a thread on the knock sensor. I modified my sensitivity settings from there.

I'll also repost my spark map. I don't know why it resized to something stupid small
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Old 06-11-2013, 11:33 AM   #26
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Thank you. This is a great example of forum collaboration at its best. I'll take a datalog showing my knock sensor garble and post a shot of it.
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Old 06-11-2013, 11:52 AM   #27
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Here is the chart and knock settings.
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AFR, VE, Timing chart review before dyno tune-knockchart.jpg   AFR, VE, Timing chart review before dyno tune-knock.jpg  
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File Type: pdf knock Settings.pdf (371.6 KB, 85 views)
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Old 06-11-2013, 03:17 PM   #28
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1) I don't think you want to look at knock in. There should be options to look at the knock on a per cylinder basis.

2) I hope you deactivated the knock sensor from pulling spark while you were on the dyno. It's set to pull 10 degrees in 1 to three degree increments. The knock thresholds that you are using will most likely need to be scaled higher as rpm increases.

Look for an MLV output like knock cyl1. I forget what the default knock sensor outputs are labeled, but there are four of them.

Start here: https://www.miataturbo.net/megasquir...-thread-67946/
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Old 06-11-2013, 05:08 PM   #29
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Yes,
knock was disabled during tuning. I'll take a look at per cyl viewing. I know that when activated and hitting the %50 it pulls 10 degrees of timing. Thats where the problem lies, it seems that its hitting the %50 mark anywhere below 2000 RPM and jumps around at RPM's higher than 2000, so I'm having a hard time trusting it.
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Old 06-11-2013, 05:17 PM   #30
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The good news is that you tuned with the det cans and feel confident that you are not experiencing knock. This will allow you to do a nice long datalog flogging the car to determine your knock window thresholds. Just make sure you set it to pull 0 timing before you start the log.

I actually don't run with mine active. i just use it for tuning.
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Old 06-11-2013, 09:56 PM   #31
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AFR, VE, Timing chart review before dyno tune-djp0623-11604-albums-my-build-2-202-picture-knock-sensor-settings-3281.jpg  
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