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2011 CTSV Coupe M BLK LSX376-B15
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Discussion Starter · #1 · (Edited)
Thank you in advance for the help.

If one compares my low 92 octane spark table to my high octane (toluene 96 estimate) table it appears in the 1.74-2.0 spark airmass areas there is a shift of retard that occurs? The lower octane table retards between 4400-4800rpm, the higher octane table retards between 3600-4000rpm. Why is this? Is there something I can change to allow advance in these areas? Does it matter?

NOTE: When comparing tables add 0.5-3.0* to the 92 table, forgot to zero the PE/COT modifier at the time. The toluene table reflects actuals.
(see attachments) ty

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Premium Member
2011 CTSV Coupe M BLK LSX376-B15
Joined
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445 Posts
Discussion Starter · #3 · (Edited)
I will log some more, I was also thinking it may be I need to add a bit more fuel between 3600-4000, I'm at high cylinder mass with considerable boost? Attached is another screen shoot, I little less choppy. You can see the slight knock event 3600-4000. I was coming off the gas at this point in the screen shot, definitely had more power, but I am limited to the street so I have to be careful, Sunday afternoon is the only time I can really get anything done with less traffic around.
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Premium Member
2011 CTSV Coupe M BLK LSX376-B15
Joined
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445 Posts
Discussion Starter · #5 ·
think i posted a while ago the maths u can put in the hpt chart v time that gives u a value of acceleration then u can actually see if ur gaining speed or not with the timing adjustments, if u didnt see it let me know ill put it in here
If you wouldn't mind, post it again, may have missed it?
 
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