tuning experts, why did my motor fail ?
Jan 14, 2007 | 11:43 PM
#11
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From: southern california
Originally Posted by Alvin@pcmforless.com
Did you add 5 degrees all at once? Where exactly did you add it? Even in part throttle thats a pretty big jump to make in one step.
Have you pulled the motor apart yet? What let loose?
Have you pulled the motor apart yet? What let loose?
check the link in the first posts
Jan 14, 2007 | 11:45 PM
#12
Originally Posted by 2004SSS
Jan 15, 2007 | 12:02 AM
#16
I have been seeing you on other sights also,I have been watching that thing .
Originally Posted by 2004SSS
yeah it did run good, 11.9 on 22's on a bone stock motor isnt bad. i bet it would have ran a 10 second run also but only one time lol.
Jan 15, 2007 | 12:17 PM
#17
animated gif for ya. 1280X1024
http://deweygibson.com/chace%20Animation1.gif
Alright, as I mentioned in the other thread, I agree with most on here, detonation killed it. But have you had anybody talk to you about your tune yet? I think you have been without a wideband too long. The above gif shows you going into big boost and high rpm lean. Looking at your tune, that's what you are commanding. You were crazy lean IMO before she blew. It starts to go rich finally but the deed was done, too late.
You PE table never commands more than 12.25, which is fine, but your BE table isn't commanding respectable afr until after 150kpa. You are commanding 12.35 at 150KPA. And even after 150kpa it is a little lean for me.
At frame 823, TPS 92%, 131KPA, 3725RPM, you are commanding 12.3 and are at 13.22. I know you are hard on that f'er, how many times has that motor been put through that? Your damage is due to repeated detonation under intense load (launching of a 5600lb truck) and NA style AFR's comng out of the hole. At frame 831 it appears when it popped. Your wideband has you at 12.3 and a commanded 11.67.
I do find it odd that your error histogram #7 doesn't show boost, but the afr histogram #6 does. Hmmm. Your maf is set to fail at 1hertz, so that is just weird. There's something going on there.
That's my take anyway.
http://deweygibson.com/chace%20Animation1.gif
Alright, as I mentioned in the other thread, I agree with most on here, detonation killed it. But have you had anybody talk to you about your tune yet? I think you have been without a wideband too long. The above gif shows you going into big boost and high rpm lean. Looking at your tune, that's what you are commanding. You were crazy lean IMO before she blew. It starts to go rich finally but the deed was done, too late.
You PE table never commands more than 12.25, which is fine, but your BE table isn't commanding respectable afr until after 150kpa. You are commanding 12.35 at 150KPA. And even after 150kpa it is a little lean for me.
At frame 823, TPS 92%, 131KPA, 3725RPM, you are commanding 12.3 and are at 13.22. I know you are hard on that f'er, how many times has that motor been put through that? Your damage is due to repeated detonation under intense load (launching of a 5600lb truck) and NA style AFR's comng out of the hole. At frame 831 it appears when it popped. Your wideband has you at 12.3 and a commanded 11.67.
I do find it odd that your error histogram #7 doesn't show boost, but the afr histogram #6 does. Hmmm. Your maf is set to fail at 1hertz, so that is just weird. There's something going on there.
That's my take anyway.
Jan 15, 2007 | 12:41 PM
#18
I just looked at your VE table as well...your values fall off right at 170kpa. YIKES! Not good chase, BE table will command 11.67 all day, but you'll never get it.
Last edited by dewmanshu; Jan 15, 2007 at 12:51 PM.
Jan 15, 2007 | 01:05 PM
#19
I haven't looked at the files yet but what Dewey is saying is so, I agree. That coupled with the #7 cylinder inheritantly getting more air with FI and truck manifold. BOOM.
Jan 15, 2007 | 04:16 PM
#20
I agree with Dewey as well, your BE table is way too lean. I doesnt appear your timing tables are commanding too much timing in the higher airmass regions, although I didnt check to see if you had any thing else adding timing. I would bet that the damaged occured well below 5K however at 5k with the damaged that already occured it said no more.