What do you guys think happend?
I think it went lean, but from what? I have 42lbs injectors that I have sent off to get tested. I have a stock fuel pump also.
I will post a copy of my tune soon.
I have already built a new motor that is in the car now.
SRT 10 without any mods. But still hella fun too drive.
93 fox coupe with a 427 in the works.
stock fuel pump was probably dropping pressure off, but the 2000-2001 camaro ss had a recall for ringland failure on #7 I believe too.
May want to check with your dealer, I know a few guys down hear got new motors due to oil consumption, and engine noise issues..
that may be a good idea, I know it burned a lot oil. Only thing is, I dont think it caused the melted pistons
SRT 10 without any mods. But still hella fun too drive.
93 fox coupe with a 427 in the works.
up top 4 more advice
SRT 10 without any mods. But still hella fun too drive.
93 fox coupe with a 427 in the works.
thats detonation my friend.... too much advance with too little fuel at high cylinder bmep (load).... got a scan of it running?
I had a similar problem in one of my circle track practice engines. It is detonation! I had two pistons do the samething but worse. The two cylinders were too lean (due to a vacum leak in the intake) plus 32 degress of timing on cast pistons. I use forged pistons on my race engines and have never had a problem with 32 degress timing at 7000rpm.
also I meant to ask you did you eliminate knock retard in the tune somehow or disconnect the knock sensor?
I agree!Originally Posted by Hauss
I will get a copy of the tune so you guys can check it out!
SRT 10 without any mods. But still hella fun too drive.
93 fox coupe with a 427 in the works.
and nope I did not eliminate knock retard.
SRT 10 without any mods. But still hella fun too drive.
93 fox coupe with a 427 in the works.
here are is the tune it before it happend
Last edited by colamotas; 09-22-2007 at 02:42 AM.
SRT 10 without any mods. But still hella fun too drive.
93 fox coupe with a 427 in the works.
check it out
SRT 10 without any mods. But still hella fun too drive.
93 fox coupe with a 427 in the works.
Looks like one of your O2 sensors i(B1S1) is flatlined.... had the same problem, it was a broken O2 sensor wire in the harness.
You are commanding 16.5:1 in PE ! Your timing reaches 31deg in your logs too.
Frost where do you see the 16.5:1
I only see 12.5 , what do you see that I dont?
Last edited by colamotas; 09-22-2007 at 02:39 AM.
SRT 10 without any mods. But still hella fun too drive.
93 fox coupe with a 427 in the works.
I am not seeing where you even logged the commanded fuel...
What about the WB?
Sulski Performance Tuning
2000 WS6 M6 - LS6 (long block, refreshed top end), 10.8:1 CR, 90 mm ported FAST, Exo-Skel, 227/232 cam, QTP HVMC, EWP, GMMG, 9" w/4.11s
2018 Sierra SLT 5.3L A8 - Airaid intake tube, GM Borla catback, L86 Intake/Ported TB
WHOOPS! sorry.... I had 4 files open when I replied, and the one with the high PE wasn't yours :-) yours is commanding 12.9
I expect on a dyno though, you'd have found no real gains past 26-27 deg timing.
I wonder what caused the lean out, maybe the stock fuel pump!
SRT 10 without any mods. But still hella fun too drive.
93 fox coupe with a 427 in the works.
still wondering!
SRT 10 without any mods. But still hella fun too drive.
93 fox coupe with a 427 in the works.
This is more than just detonation, way to lean at some point. I will say that a/f can be perfect and at the higher hp levels this can happen in 1 second at high rpm moving a lot of air. I had 1 motor cut right through the piston rings and notched the cyl.and the piston looked just like that. Fuel pump failure caused that 1 at the ~600 or so level.
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