My evo ix knock sum ok?
Originally Posted by 5k6
Did 3 more runs today and put BP 93 in which is what it was tuned on:
Originally Posted by nj1266
Correct me if I am wrong, but shouldn't the ECU pull timing when there is increased knock sum? In the first log there is hardly any pulled timing despite that fact that the there is knock sum of 7, 6, 5 from 3600 to 5200. infact, timing goes up from 3 to 5 to 6 to 7. In the last log something similar is going on.
4-7 counts, ecu may pull a degree of timing
7+ counts, ecu pulls 1 degree for every 3 counts
this info is not yet confirmed to apply to the evo ecu's, but is now generally accepted.
and is completely incorrect. The evo ecu will pull timing on a knock sum of 1.
As for the original poster.
You really got no where by lowering the boost, your timing seems to have increased but still looks very low to me, on the stock turbo I was seeing 10-12 on peak boost and a steady rise to almost 20 degrees by redline.
Soooo....try adding some fuel.
send the logs to 4tun8@comcast.net if you need help finding where to add some fuel.
Depending on where your boost controller is tapped, this could also be an issue with a boost leak. Having your MBC tapped off the BOV for example in a boost leak condition would just force the turbo to spool harder, which would create more heat, which would make your knock counts increase (heat = more detonation).
For about 10 bucks at a hardware store you can build yourself a boost leak tester and find out what's going on.
As for the original poster.
You really got no where by lowering the boost, your timing seems to have increased but still looks very low to me, on the stock turbo I was seeing 10-12 on peak boost and a steady rise to almost 20 degrees by redline.
Soooo....try adding some fuel.
send the logs to 4tun8@comcast.net if you need help finding where to add some fuel.
Depending on where your boost controller is tapped, this could also be an issue with a boost leak. Having your MBC tapped off the BOV for example in a boost leak condition would just force the turbo to spool harder, which would create more heat, which would make your knock counts increase (heat = more detonation).
For about 10 bucks at a hardware store you can build yourself a boost leak tester and find out what's going on.
Originally Posted by 4TUN8
and is completely incorrect. The evo ecu will pull timing on a knock sum of 1.
As for the original poster.
You really got no where by lowering the boost, your timing seems to have increased but still looks very low to me, on the stock turbo I was seeing 10-12 on peak boost and a steady rise to almost 20 degrees by redline.
Soooo....try adding some fuel.
send the logs to 4tun8@comcast.net if you need help finding where to add some fuel.
Depending on where your boost controller is tapped, this could also be an issue with a boost leak. Having your MBC tapped off the BOV for example in a boost leak condition would just force the turbo to spool harder, which would create more heat, which would make your knock counts increase (heat = more detonation).
For about 10 bucks at a hardware store you can build yourself a boost leak tester and find out what's going on.
As for the original poster.
You really got no where by lowering the boost, your timing seems to have increased but still looks very low to me, on the stock turbo I was seeing 10-12 on peak boost and a steady rise to almost 20 degrees by redline.
Soooo....try adding some fuel.
send the logs to 4tun8@comcast.net if you need help finding where to add some fuel.
Depending on where your boost controller is tapped, this could also be an issue with a boost leak. Having your MBC tapped off the BOV for example in a boost leak condition would just force the turbo to spool harder, which would create more heat, which would make your knock counts increase (heat = more detonation).
For about 10 bucks at a hardware store you can build yourself a boost leak tester and find out what's going on.
Originally Posted by nj1266
Correct me if I am wrong, but shouldn't the ECU pull timing when there is increased knock sum? In the first log there is hardly any pulled timing despite that fact that the there is knock sum of 7, 6, 5 from 3600 to 5200. infact, timing goes up from 3 to 5 to 6 to 7. In the last log something similar is going on.
Originally Posted by elhalisf
0-3 counts, ecu does nothing
4-7 counts, ecu may pull a degree of timing
7+ counts, ecu pulls 1 degree for every 3 counts
this info is not yet confirmed to apply to the evo ecu's, but is now generally accepted.
4-7 counts, ecu may pull a degree of timing
7+ counts, ecu pulls 1 degree for every 3 counts
this info is not yet confirmed to apply to the evo ecu's, but is now generally accepted.
Knock:
Range: 0 to 43
The knock sum scale is given to represent the signal from the knock sensor to the ECU. The ECU then calculates the amount of detonation present. The higher the knock sum the more the ECU retards timing to get rid of the knock.
With a knock sum of:
3 or below, the ECU will advance timing.
Between 3 and 7, the ECU leaves timing alone.
Higher than 7, the ECU will begin retarding timing. Higher knock = higher retard, with the possiblity of seeing less than 4deg total advance at the maximum knock sum of 43.
One important note to remember is the knock sensor can detect "false" knock and retard timing. This is most commonly caused from the noisy lifters but anything it can audibly pick up could cause this.
Originally Posted by mad_VIII
looks to me like it pulled 4 degrees and kept it pulled for while. Just because it pulls timing does not mean timing will not ramp up it will just ramp up at a lower offset due to the timing pull. so instead of going 7,8,9 it may go 3,4,5.
RPM, Timing, O2
3125.0, 20.0, 0.88
3273.0, 13.0, 0.92
3438.0, 7.0, 0.92
3660.0, 4.0, 0.94
3938.0, 3.0, 0.94
4180.0, 7.0, 0.94
4430.0, 7.0, 0.94
4660.0, 7.0, 0.94
4898.0, 8.0, 0.94
5133.0, 9.0, 0.94
5355.0, 8.0, 0.96
5586.0, 9.0, 0.96
5813.0, 9.0, 0.96
6035.0, 11.0, 0.96
6270.0, 13.0, 0.96
6465.0, 15.0, 0.96
6660.0, 17.0, 0.96
6848.0, 19.0, 0.98
7055.0, 19.0, 0.98
7211.0, 21.0, 0.98
7391.0, 21.0, 0.98
Originally Posted by 5k6
OK here is one of the runs I did at 21 psi:
Al do you have the final log for my custom tune so I can see what the boost was at during the tune?It might of been set lower then 21 psi I can't remember.
Al do you have the final log for my custom tune so I can see what the boost was at during the tune?It might of been set lower then 21 psi I can't remember.
Is there any possibility that Evoscan does not work properly on Evo IX's. I only ask because even with my bone stock evo I was getting knock counts. I even lowered my boost to 17Psi or less and I still reported knock.
Here is a log of stock map with an intake (added after the previous incident I just described) at 17 psi.
Here is a log of stock map with an intake (added after the previous incident I just described) at 17 psi.
Code:
RPM TPS AirTemp Knock TimingAdv 3750 100 96.548 0 13 3812.5 100 96.548 0 11 3875 100 96.548 0 9 3875 100 95.504 0 9 3906.25 100 95.504 0 8 4000 100 95.504 0 7 4031.25 100 95.504 0 6 4093.75 100 95.504 0 4 4125 100 94.46 0 3 4187.5 100 94.46 0 2 4281.25 100 94.46 0 3 4375 100 94.46 0 5 4468.75 100 94.46 0 5 4531.25 100 94.46 0 6 4625 100 94.46 0 5 4718.75 100 94.46 1 4 4781.25 100 94.46 1 5 4906.25 100 94.46 1 7 4968.75 100 94.46 1 7 5062.5 100 94.46 4 5 5156.25 100 94.46 4 7 5250 100 94.46 4 7 5312.5 100 93.416 4 7 5343.75 100 93.416 4 7 5406.25 100 93.416 4 8 5500 100 93.416 4 8 5562.5 100 93.416 4 8 5625 100 93.416 4 8 5656.25 100 93.416 3 9 5718.75 100 93.416 3 10 5781.25 100 93.416 3 10 5843.75 100 93.416 3 10 5906.25 100 93.416 3 10 6000 100 92.372 3 10 6062.5 100 92.372 3 10 6125 100 92.372 3 11 6187.5 100 92.372 3 11 6281.25 100 92.372 3 12 6343.75 100 92.372 3 12 6406.25 100 92.372 3 13 6468.75 100 92.372 3 13 6562.5 100 92.372 2 13 6656.25 100 92.372 2 13 6718.75 100 92.372 2 13 6750 100 92.372 2 14 6843.75 100 92.372 2 14 6906.25 71.37254902 92.372 2 14 6781.25 12.94117647 92.372 0 38
I find this very interesting
4968 1 7
5062 4 5
5156 4 7
5250 4 7
5312 4 7
5343 4 7
At 5062 your ECU pulls 2 degrees of timing since it allegedly saw knock. Ok that is along the lines posted by DSMers. But then the 4 knock value continues and the ECU adds timing. So you have timing being added as knock continues.
4968 1 7
5062 4 5
5156 4 7
5250 4 7
5312 4 7
5343 4 7
At 5062 your ECU pulls 2 degrees of timing since it allegedly saw knock. Ok that is along the lines posted by DSMers. But then the 4 knock value continues and the ECU adds timing. So you have timing being added as knock continues.
Originally Posted by nj1266
I find this very interesting
4968 1 7
5062 4 5
5156 4 7
5250 4 7
5312 4 7
5343 4 7
At 5062 your ECU pulls 2 degrees of timing since it allegedly saw knock. Ok that is along the lines posted by DSMers. But then the 4 knock value continues and the ECU adds timing. So you have timing being added as knock continues.
4968 1 7
5062 4 5
5156 4 7
5250 4 7
5312 4 7
5343 4 7
At 5062 your ECU pulls 2 degrees of timing since it allegedly saw knock. Ok that is along the lines posted by DSMers. But then the 4 knock value continues and the ECU adds timing. So you have timing being added as knock continues.
Last edited by dudical26; Jul 16, 2006 at 09:21 AM.