Whats up with my timing?
Whats up with my timing? 98 Camaro SS, 3600 Vig, Long tubes to true 3" duals dumped, SLP Lid, 180* tstat, B&M Supercooler, HPTuners (Speed Density), 91 octane, 90* intake temps.
My engine temps never go much over 190 even after beating on it, trans temps are usually 150-160 unless I beat on it they climb to 190.
From a 0-115 run timing starts out at about 22* and by the end of first its down to 18.5* (no knock just running off low octane tables). Second gear hits and timing stays roughly the same, again no knock. Third gear hits and instantly .9* of KR brings my timing down to 15.5, it gradually decays and by 5000rpms I'm back to 17* of timing with 0 KR. Two frames go by and then I see .6* of KR, dropping my timing back down a bit then decays until I let off at 5300rpms (115 mph).
Next I do a 30-115 run. Instantly on the down shift I see 4* of KR dropping my timing to 14.5*. It decays evenly until it hits 0 KR and 19* of timing in 3rd at 5300 and stays like that until 115mph.
Next I go from 57 - 86mph. Instant 3.9* KR on the hit and gradual decay until I let out.
Finally I go from 32-90 and never see KR, timing is around 18-19*.
First thing I notice is that its running off the low octane tables and seeing no more than 19* of timing usually at WOT. Shouldn't I be able to run more than that? Second I don't understand how its so inconsistent, I mean one pass from a 30 roll it spikes to 4* KR and on a pull AFTER that when its hotter is shows 0*?? I would like to be able to bump my timing up and for the most part it seems like I should be able to but those spikes scare me.
I have not really touched anything related to spark control in the tune.
My engine temps never go much over 190 even after beating on it, trans temps are usually 150-160 unless I beat on it they climb to 190.
From a 0-115 run timing starts out at about 22* and by the end of first its down to 18.5* (no knock just running off low octane tables). Second gear hits and timing stays roughly the same, again no knock. Third gear hits and instantly .9* of KR brings my timing down to 15.5, it gradually decays and by 5000rpms I'm back to 17* of timing with 0 KR. Two frames go by and then I see .6* of KR, dropping my timing back down a bit then decays until I let off at 5300rpms (115 mph).
Next I do a 30-115 run. Instantly on the down shift I see 4* of KR dropping my timing to 14.5*. It decays evenly until it hits 0 KR and 19* of timing in 3rd at 5300 and stays like that until 115mph.
Next I go from 57 - 86mph. Instant 3.9* KR on the hit and gradual decay until I let out.
Finally I go from 32-90 and never see KR, timing is around 18-19*.
First thing I notice is that its running off the low octane tables and seeing no more than 19* of timing usually at WOT. Shouldn't I be able to run more than that? Second I don't understand how its so inconsistent, I mean one pass from a 30 roll it spikes to 4* KR and on a pull AFTER that when its hotter is shows 0*?? I would like to be able to bump my timing up and for the most part it seems like I should be able to but those spikes scare me.
I have not really touched anything related to spark control in the tune.
Any input on this? Is it always going to run off the low octane tables when in SD mode with no MAF? Should I copy the high octane table to the low and see what happens even tho its already spiking to 4* of KR? Why would it be spiking KR like that? It only does it on a shift (up or down). Could it be burst knock, false knock, or something else?
