Evoscan knock detection
#1
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Evoscan knock detection
what would be an acceptable knock count that could be detected by evoscan? some of my DSM buddies say that they dont worry about 1-2 counts that get detected by DSMLink. when i log sometimes i get 2-3 counts. now i know that i should tune for 0 knock but i dont wanna go lowering my timing if the knock is engine noise or something like that. any help is appreciated.
#3
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what would be an acceptable knock count that could be detected by evoscan? some of my DSM buddies say that they dont worry about 1-2 counts that get detected by DSMLink. when i log sometimes i get 2-3 counts. now i know that i should tune for 0 knock but i dont wanna go lowering my timing if the knock is engine noise or something like that. any help is appreciated.
#7
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I would say 4 counts is acceptable. It will vary depending on daily changing variables. That is just the ecus way of adjusting itself. With 2-3 you should be fine. One day you could see 0 knock next day you may see 4 counts especially if you tuned on a hotday and then you do a log on a cold day. Long as your not getting something outrageous like 10 counts throughout the rpm band.
You should also look at the timing in the load cells above and below those you calculate to hit on a given run. 2-3 counts might be ok if you only get that ocasionaly, but if you see that on every run or accross alarge part of the rev range then you need to re tune.
MB
Last edited by burgers22; Mar 2, 2007 at 09:32 AM.
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#8
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How is the ECU adjusting its self if you are not decrementing the octane number? The octane number is the only way the ECU will change the way it deals with timing and fuel in open loop over a long term. Knock count will pull timing, but that is not really adjustment, because unless you reach the point where the octane number is changed the car will keep knocking. You can adjust the barometric compensation if there are significant changes in the way your car behave due to tempreture change.
You should also look at the timing in the load cells above and below those you calculate to hit on a given run. 2-3 counts might be ok if you only get that ocasionaly, but if you see that on every run or accross alarge part of the rev range then you need to re tune.
MB
You should also look at the timing in the load cells above and below those you calculate to hit on a given run. 2-3 counts might be ok if you only get that ocasionaly, but if you see that on every run or accross alarge part of the rev range then you need to re tune.
MB
#11
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I live in the same climate as Houston (Rio Grande Valley), you can tune your knock out. I'll tell you this, when my car was custom tuned it didnt knock and it had block timing (custom tuned in Houston). Later the car started knocking and I decided to go with a different tuner, while working with him I decided.. I can do this myself and then I did. My tune looks more conservative than both of the professional tuners tunes that I tried but when I look at the logs I know my non knocking tune is faster than theirs (LogSeconds and no knock). Now, just to be fair I didnt work with the second tuner long enough to allow him to get it perfect and the first tuner spent a grand total of 2hrs with my car where I've spent countless hours reviewing logs and making changes to my image for it to run with very little knock (occaisional 1's with equal amounts of totally knock free runs) and yes it knocks less than it does on the stock map.
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I'd add that it depends on what you use your evo for. I'm tuning for zero knock becuase I track the car also and dont' change my tune for the track. If the car was my daily driver only, 2-3 counts here and there are ok.
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I was testing this yesterday....by 1-4 does this mean that 1.5634 is like 1 and 1/2 counts of knock thanks! How will I link my zeitronix to this program when I install it?
#14
1. As close to 0 as possible
2. 4 and below is mild to nothing at all
3. Above 4 and consistant, look at ignition timing, fuel, type of plug, boost, air temp, gear, and most importantly early rpm A/F
2. 4 and below is mild to nothing at all
3. Above 4 and consistant, look at ignition timing, fuel, type of plug, boost, air temp, gear, and most importantly early rpm A/F