Evo 9 w/ TBE w/HFC, MBC spiking around 23psi, cone filter, walbro, 93 octane shell v power.



Knock seems to be consistent but sporatic in count. Does it look like im trying to run too much timing for a 9? The csv file named roll-in was 6th gear at normal highway speeds and a steady increase in throttle to WOT and then a steady decrease back out.

I dont know if i should try to take big chunks of timing out of the middle to lower right side of the timing map, or if i should try to chase it around cell to cell to cell. Could it be false knock? Please advise.

 

Try dropping your timing in the 240-260 load from 2500 to 4500 down to 2 degrees and see what happens. Basically removing 3 degrees where the knock is starting.

 

Im actually having the same issue (GSR) in 5th.

You need to log your car and see what load cells your hitting, and make adjustments by what load cells your hitting. Ex. 3 counts @ 3500, 280 load, you would open up your HO timing map and look up 280 load and 3500 rpm and take out 1*. Every 3 counts, take out 1*.
I think 3 - 5* @ peak is the "sweet spot" on a IX w/ an IC, and 2-3 w/ out. You have 6-5. Other than that your timing looks fine. So does your afr.

 

Forgot to mention, just for clarification, all 3 of my HO timing maps are the same.

 

Shell is now adding nitrogen to the fuel. (saw it on a commercial). I would try chaning brands to see if it helps. I had the same problem with the new shell gas. The nitrogen seems to change the way he fuel burns.

Oh and do the timing adjustments already suggested. Can't be too safe.

 

Def. dont remove big chunks......you will just be hurting yourself rather than helping, you just have to make small adjustments in an area at a time right before the knock event occurs until you get it. I mean all it could take is a 1-degree adjustment and it all goes away, I have seen that on my car with similar consistent knock counts.

 

The thing that bothers me, is this was non-existent to this degree up until last night. I would never have consistent knock like this throughout my logs. I would get the usual 1 run where knock seems to spread, but all other logs would be 1's and maybe a few 2's in certain areas. Then all of a sudden, with no changes to the maps, this happens - and it happened to the entire WOT pull. That never happened before. Partly worried, partly confused.

 

You just have to remember tunes dont stay perfect.....unfortunately. They always need tweaked now and again and many factors can come into play that make a car knock one day and not another - Temp., humidity, moon alignment, etc. Also things like boost leaks can cause things like this to happen, so it is impossible for everything to be perfect all the time. Even fuel can be a factor, run the tank out and take it easy then fill up with some fresh 93 or do a boost leak test before you go modifying the map.

I mean hell I have seen my car knock more towards the end of an oil change cycle and a fresh oil change completely cleans it up? Strange things happen and you will drive yourself crazy trying to always decipher it, check the obvious and go on from there.

 

also your AFR jumps around too much