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Tuner
05 LS2 in GTO - Knock Retard Decay Rate Safe values?
Right now,
1500rpm = 3.000 on higher g/cyl values
2000rpm = 1.000
2500rpm = 0.602
3000rpm->8000rpm = 0.203
So, my question is, what values can I tweak this to and still be safe? I notice the lower RPMS recover much faster (makes sense). Just wondering if I could put 3000rpm->4000rpm somewhere like 0.4 and still be safe?
I'm sure I wouldn't notice a difference, and I'm sure it'd be best to leave alone to be safe but I'm just wondering what everyone does here....
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Senior Tuner
I have everything at 9.011 values (legacy from an
older display basis). All that happens is, if you truly
are running in ping conditions, you will "motorboat"
along in light ping instead of burying it and crawling
out. I also reduced my attack rate.
Safe? Dunno. If you were getting into power adders
especially the kind where things can go wrong in a
hurry, an aggressive KR scheme is your friend. On a
car that is well bedded in, tune-wise, and not being
changed then you can play with more latitude / less
fear of consequences.
Lowering attack, raising decay makes finding the ping
threshold (thus the best timing point, which is a few
degrees less) more plain. Stock settings obscure the
real ping situation for too long after the hit.