C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Need help with HSR tune / tunerpro

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Old Mar 21, 2010 | 10:17 AM
  #1  
qws's Avatar
qws
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Melting Slicks
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From: Clifton Park NY
Default Need help with HSR tune / tunerpro

Having some issues with the tune for the HSR.
As you know the tune only works as well as the mechanicals so here's what I've done.

1) confirmed 19hg at the plenum
2)Ohm'd out every injector 13.3 to 13.5. Flow is 25.1 - 26.11
3) Pull spark plugs. Seem ok little white/gray here and there but not bad
4) Vac line off FPR 52 psi, Vac line on 44
5) Verified KS is not to tight
6) Triple check timing set to 6* BTDC and matches datalog program while running
7) Check for Exhaust pipe leaks

Heres a few screen shots from a datalog yesterday.
INT /BLM's are all over the place, WB02 reads a lean condition, Knock Counts are high
Tunerpro is the tuning software thats used. Been in touch with people like PCMforless and they can't do anything for me with a tune so I'm on my own. I already have a thread at TGO as well.
So any ideas? These are screenshots from the same datalog file.



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Old Mar 21, 2010 | 11:22 AM
  #2  
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DBall
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From: Snellville GA
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QWS,
Check to be sure you have no exhaust gasket leaks off the header collectors. I did and my wb O2 never got close to the engine O2 sensor. After the fix, my tune settled down. PCM for less did my original tune for my Super Ram which I used, and I use Datamaster for datalogging. My original tune for the Accel SuperRam was ok until I went beyond 4800rpm and it leaned out. After my adjustments using Moates burner and Tuner pro RT, I was able to get my mod HSR to work well. I am not familiar with the Tuner pro logging as mine never worked well.
I bet Craig Moates could help. Good Luck MSTRS2
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Old Mar 21, 2010 | 11:26 AM
  #3  
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DBall
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From: Snellville GA
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Everything I see there shows it running too lean for me.
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Old Mar 29, 2010 | 01:54 AM
  #4  
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pologreen1
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Did you figure it out. I am a little nervous about getting my speed density figured out with the hsr stuff. I hope I can get a decent tune around here.
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