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'08 5.3 Yukon

Old Oct 17, 2008 | 10:47 PM
  #11  
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Looks like I was pretty damn close
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Old Oct 18, 2008 | 07:10 AM
  #12  
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tooo close its scary lol!
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Old Oct 18, 2008 | 09:41 PM
  #13  
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got a vid???
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Old Oct 19, 2008 | 07:09 AM
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no vid, but i will post up the graph....

I'm kinda worried though, above 5k rpm, my AFR was leaning out to around 14AFR. Tried adjusting the MAF and PE with no avail....

IDC were topping 120%. Kinda weird for a N/A motor..... any ideas??
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Old Oct 19, 2008 | 09:59 AM
  #15  
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You need bigger injectors methinks! lol

So you gained 15rwhp and 12 rwtq from headers. hmm....did you feel a SOTP difference?
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Old Oct 19, 2008 | 11:12 AM
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Originally Posted by GMCtrk
You need bigger injectors methinks! lol

So you gained 15rwhp and 12 rwtq from headers. hmm....did you feel a SOTP difference?
a big SOTP feeling! yeah i was expecting a lot more.......but the tuning still isn't dialed in right, if it is injectors, ill buy the 8.1L and stick em in their.... what confuses me though is that ppl are running stock injectors on supercharged applications, so im really not sure... over on hp tuners they're stating it might be the fuel pressure...

once i get some time ill get the lm1 out and re do the maf tables and see if that helps me out or not.....
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Old Oct 21, 2008 | 10:39 AM
  #17  
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I don't think you should be maxing out the injectors yet. I'll be watching this thread.
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Old Oct 24, 2008 | 12:19 PM
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that is the case.. I rescaled the MAF values down and was still getting 117% IDCs.

AFR Reads good till around 5200rpm then it just gets nasty lean
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