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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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would prob have to see it on a dyno to see if ur actually loosing torque or not, or could just be the resistance to knock affecting it as just going by knock only shows when u have gone too far on petrol or way too far on toluene or way way way too far on ethanol :unsure:
 

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2011 CTSV Coupe M BLK LSX376-B15
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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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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
 

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2011 CTSV Coupe M BLK LSX376-B15
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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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maths is ([8001.113.avg(-1500)]) - ([8001.113.avg(1500)]) u have to log ''undriven wheelspeed'' so ur using the front wheels so not wheel spin can affect it, use scale of say -40 to 40 so its basically the wheel speed against itself over time past and future so if its increasing in acceleration the number will go higher, if u want a different value output u can play with the time in each 1500 or -1500 if u change one change both the same but should be fine as is
 

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maths is ([8001.113.avg(-1500)]) - ([8001.113.avg(1500)]) u have to log ''undriven wheelspeed'' so ur using the front wheels so not wheel spin can affect it, use scale of say -40 to 40 so its basically the wheel speed against itself over time past and future so if its increasing in acceleration the number will go higher, if u want a different value output u can play with the time in each 1500 or -1500 if u change one change both the same but should be fine as is
Is this a filter or the set up for a graph
 

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also just to note because the math uses future and past in the equation it wont work live, u will have to finish the log and then watch it to see it working right
 
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