Just got back from the track?
09-06-2008, 11:27 PM
#1
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Just got back from the track?
I just got back from the track and I have lots of questions. First of all I ran a best time of 12.47 @ 110mph which is ok but I feel like I have alot left after I make a couple changes to the tune.
- I have a Yank TT3000 and when I look at the logs it doesnt show the torque converter locking up at all and I remember reading that it should lock up after the 2-3 shift. This is something that I can change with EFI Live but I need to know how to do that.
- I also need to know if the upshift TCC lock {D2801} should be set to yes or no
- When I checked the logs from each run I noticed that right after the 2-3 shift when the truck is at 4700rpm's-81mph there is a instant KR spike which gradually goes down within a second, Anybody know what would cause this?
- I also think I have about 2 degrees too much timing based of how the spark plugs looked, What is the correct way to change the timing?
I have added a couple of logs below, I had to start recording a little bit early so be patient because the actual log is towards the end. By the way I have EFI Live just so you know. Thanks!
- I have a Yank TT3000 and when I look at the logs it doesnt show the torque converter locking up at all and I remember reading that it should lock up after the 2-3 shift. This is something that I can change with EFI Live but I need to know how to do that.
- I also need to know if the upshift TCC lock {D2801} should be set to yes or no
- When I checked the logs from each run I noticed that right after the 2-3 shift when the truck is at 4700rpm's-81mph there is a instant KR spike which gradually goes down within a second, Anybody know what would cause this?
- I also think I have about 2 degrees too much timing based of how the spark plugs looked, What is the correct way to change the timing?
I have added a couple of logs below, I had to start recording a little bit early so be patient because the actual log is towards the end. By the way I have EFI Live just so you know. Thanks!
09-06-2008, 11:47 PM
#4
Congrats on the great new times. Your speed is good for lower 12's/hi 11's! Yank recommends NOT locking the converter wot...I just talked with Dave@Yank early this week about it.
I can't see your tune or logs (hpt guy here) but the KR you see could be from the added load from the TCC apply?
Anyway, great runs!
I can't see your tune or logs (hpt guy here) but the KR you see could be from the added load from the TCC apply?
Anyway, great runs!
09-06-2008, 11:48 PM
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You can pull 2 degrees on timing from the high octane table between 1.00 g/cyl and 1.08 g/cyl and between 4400 rpm and 5200 rpm. You can also increase the decay rate on the KR so the timing comes back sooner once the detonation has occured. I couldn't see the wideband AFR on the log, do you have it on your end? Is there a lean spot after the shift or anything like that?
Last edited by Stoichiometric; 09-06-2008 at 11:50 PM. Reason: typo
09-06-2008, 11:56 PM
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The converter will not lock the way it is set in the tune. You can change the apply vss to 81mph (also need to change the release parameters to 81mph or less) at wot and it should lock right after the 2-3 shift if you want that to happen. The TCC upshift lock is OK set to no, that is hard on parts from what I hear.
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09-07-2008, 12:10 AM
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Yea the air/fuel didn't show because it was somehow unplugged. Do I change the timing on the high octane table? Thats strange that Yank said not to lock the converter, I was just wanting to lock it at the track and then change it back for everyday use. Did he say why you shouldn't have the converter locked.
