PATCH: NLTS + Valet + KnockCEL
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Joined: Feb 2006
Posts: 1,345
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From: MA
As long as the track is prepped and I can cut consistant 60' times I will, I am working on a race gas map so I will have my laptop and log the runs as well. The track in Roswell has been very hit or miss, I have cut 1.72 60' there as well as 2.1 spinning like its raining, and the left lane has a bump that makes it hard to launch , so I have only been consistant in the right lane. I have a stack of timeslips as a good past ref, but I know, same day/conditions, etc.
I know a few people have reported on this but, I thought I'd chime in to. I was doing do logs last night of teh NLTS shift point as I was getting knock, thanks to the CEL mod. I noticed the 1-2 shift sees about 5 counts of knock but, the 2-3 and 3-4 counts are much higher, anywhere from 8 to 20!!
My thought is that maybe the knock sensor is sensing the rev limiter activating and the vibration from laying on the rev limiter is causing the sensor to read that as a knock. Similar to the 5th gear problem with the 5 speeds that causes the knock sensor to pick up the noise and cause the ECU to trigger the infamous PO300 code.
I autocross religiously and am on the rev limiter alot but, I've never logged than to see if that too was trigger knock counts.
Any thoughts?
My thought is that maybe the knock sensor is sensing the rev limiter activating and the vibration from laying on the rev limiter is causing the sensor to read that as a knock. Similar to the 5th gear problem with the 5 speeds that causes the knock sensor to pick up the noise and cause the ECU to trigger the infamous PO300 code.
I autocross religiously and am on the rev limiter alot but, I've never logged than to see if that too was trigger knock counts.
Any thoughts?
I don't have any between shift knock. However since I road course the car I have paid a lot of attention to lower load conditions. I've had to take a lot of timing out of load cells all the way down into the 80 column.
iow, I have a feeling you are hitting load cells you have not been into before. You just need to trim them back. Of course I am guessing what is happening so consider it worth what you paid for.
iow, I have a feeling you are hitting load cells you have not been into before. You just need to trim them back. Of course I am guessing what is happening so consider it worth what you paid for.
Well, I kinda got a chance to test out my car at the track, also to see what the NLTS could do. I say "kinda" because I only got 3 runs completed because my fiance was pissed because it was 40 freaking degrees outside during my runs!!! Yeah, not good track conditions but I still manages a 1.73 second 60' on my stock clutch. Honestly, I think I could have pulled off a 1.6 if it was warmer and I had more track time with the evo under my belt. This was with my 22.5psi maps and I was planning on running my 24psi maps as well to have a good comparison. I just need more than 3 passes to get used to this car, damnit! Women.
With more track time and better weather, I forsee a solid 12.4XXsec. pass with this 22.5psi flash. Even better with the 24psi tune
On a side note, NLTS was flawless and sure does help! Even with the NLTS, I still managed to miss 3rd gear on my last pass. That was definitely a strong run too, I got ahead of myself and made a simple error. NLTS FTW!!!
With more track time and better weather, I forsee a solid 12.4XXsec. pass with this 22.5psi flash. Even better with the 24psi tune
On a side note, NLTS was flawless and sure does help! Even with the NLTS, I still managed to miss 3rd gear on my last pass. That was definitely a strong run too, I got ahead of myself and made a simple error. NLTS FTW!!!
Last edited by Jack_of_Trades; Oct 13, 2007 at 05:53 PM.
http://docs.google.com/Doc?id=dcwsmvt8_32g66jf6
is a link to a log taken on a road course. note the psi peaks at about 18 and drops to about 10 during nlts. The stair step on the bottom is the car speed, the swiggly lines are suspension inputs on the front and back wheels.
the yellow on the bottom is knock
a couple of thoughts, set the throttle in the 85 to 90 region, I noticed going over bumps I'd lift a bit and thus release the throttle to soar.
In less than ideal conditions a drop of 1300 or 1400 rpm works pretty well
is a link to a log taken on a road course. note the psi peaks at about 18 and drops to about 10 during nlts. The stair step on the bottom is the car speed, the swiggly lines are suspension inputs on the front and back wheels.
the yellow on the bottom is knock
a couple of thoughts, set the throttle in the 85 to 90 region, I noticed going over bumps I'd lift a bit and thus release the throttle to soar.
In less than ideal conditions a drop of 1300 or 1400 rpm works pretty well
Last edited by nothere; Oct 13, 2007 at 04:00 PM.
I had the knock, its caused by hitting unused load cells with a drastic timing jump, Mine were around 140-160 load, 5800-6000 rpm, and some spots 21 degrees timing, I dropped all four blocks in that area to 15-16 degrees and tuned out all the knock between shifts, look at your logs, it will go from 15-16 degrees timing to 21-24 depending on the cells it hits at the drop point, very east to tune out if you just look at the logs.
Wow ... I just made a thread for discussion on the NLTS knock w/o realizing the discussion was going on here ...
Here is my suggestion, and I'm not sure if it's possible ... Tephra could advise I guess ...
When using the NLTS, simply pull the timing a desired number of degrees dynamically rather than goofing up the map itself. for instance ...
If NLTS = True, [Requested Timing] - Xº ...
So, if you drop to the 140% cell with 16º advance and had the timing pull set to 6º, actual timing would be 10º.
This method would allow smooth timing transitions and power delivery during part throttle boosting and safe shifts when using NLTS at WOT.
Thoughts?
Here is my suggestion, and I'm not sure if it's possible ... Tephra could advise I guess ...
When using the NLTS, simply pull the timing a desired number of degrees dynamically rather than goofing up the map itself. for instance ...
If NLTS = True, [Requested Timing] - Xº ...
So, if you drop to the 140% cell with 16º advance and had the timing pull set to 6º, actual timing would be 10º.
This method would allow smooth timing transitions and power delivery during part throttle boosting and safe shifts when using NLTS at WOT.
Thoughts?