Do you run a knock sensor?
Do you run a knock sensor? When people build new motors, it seems like the KS is one of the items that gets removed.
(either physically, or by tuning)
I'd like to know how many of you have gone that route.
(either physically, or by tuning)
I'd like to know how many of you have gone that route.
i ride with my ks on my stroked LT1. it hasn't been disabled and the senstivity tables have not been adjusted either. the only adjustmenets i made were to the burst knock tables. i had knock for like two years and couldn't figure it out. i thought it was false kncok until it went away after modifying the burst kncok tables. guess it was real after all. glad i fixed it instead of just disabling the KS.
the knock attack rates are how fast the knock rmoves timing and how fast it puts it back.
there are a couple burst knock tables i believe. i'm at work so i don't have the program in front of me but there is burst knock vs. coolant temp, burst kncok vs. % airflow, and maybe one or two more that I can't think of off the top of my head. i raise them all to match the rest of my tune and surprise no more knock. the burst knock tables are in the constants tables. go slow and you will find them all.
there are a couple burst knock tables i believe. i'm at work so i don't have the program in front of me but there is burst knock vs. coolant temp, burst kncok vs. % airflow, and maybe one or two more that I can't think of off the top of my head. i raise them all to match the rest of my tune and surprise no more knock. the burst knock tables are in the constants tables. go slow and you will find them all.
the knock attack rates are how fast the knock rmoves timing and how fast it puts it back.
there are a couple burst knock tables i believe. i'm at work so i don't have the program in front of me but there is burst knock vs. coolant temp, burst kncok vs. % airflow, and maybe one or two more that I can't think of off the top of my head. i raise them all to match the rest of my tune and surprise no more knock. the burst knock tables are in the constants tables. go slow and you will find them all.
there are a couple burst knock tables i believe. i'm at work so i don't have the program in front of me but there is burst knock vs. coolant temp, burst kncok vs. % airflow, and maybe one or two more that I can't think of off the top of my head. i raise them all to match the rest of my tune and surprise no more knock. the burst knock tables are in the constants tables. go slow and you will find them all.
Ok i found them what did you raise them to? Do you have an explanation of what these tables actually mean? Thanks for the help I have been messing around with this knock issue for a couple years on and off.
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Whenever you tune your car doesn't the lt4 km become next to useless? I don't know why but this is what i've been told.. I have lt4 km on tuned pcm.. This is what Ion told me..
Well i have a lt4 km and it didn't do anything on my car with just bolt ons. I still ended up tuning out the ks all together again but im trying to figure out how to just take out what ever is causing the false retard and not tuning it out completely.
Seems like if you have a loud valve train or headers that are making a decent rumble, it will cause a little false retard. All that I've found to get rid of it is by getting rid of the ks all together or getting the lt4km, some valve covers that will hold the noise in better and hope the headers don't cause it to retard any.. As far as I know those are about the routes to take.. If i'm mistaken please inform me so i know!
Why physically remove it though, that makes no sense. If its unpluged then thats the same as it not being there but it's still keeping coolant in the block. If you physically ditched it, you would have to find some thing to go in the block to takes its place, just kinda makes no sense to physically remove it.
Ive had false knock for a long time and when I decide to tune my car I turned the thing off. Its been tuned on the dyno both part throttle and wot. I get no knock and I run about 38 degree of timing at wot.
I zeroed out all the low octane tables as well
Bumped up the knock retard enable coolant temp to 95C
Bumped up the burst knock enable %diff airflow thresh to 14.8%
Bumped up the burst knock enable coolant temp thresh to 95C
Worked for me and i had knock for years. I made these changes (except low octane tables) all at the same time so I couldn't point out which one solved the issue. maybe it was a combination. just glad to have fixed the problem.
