Kinda weird that both of us saw a change in boost when we did this. I wonder why/how it's affecting it.

 

Both of you had your boost increase with the change in the timing maps?

That's great.

I have actually seen it where the ECU will assume or "make" knock, when there really isn't any. I was tuning an Evo 10, logging the normal stuff on Evoscan, and I also had my detcans. So I put the low oct timing map 5 degrees lower than the high oct map, and did 3 pulls on the same road, going the same direction (lots of U-turns, lol) well I would get 5-6 counts of knock consistently at 6800 rpm on all 3 runs.

Then I put the low oct timing map the same as the high oct timing map, and did 3 more pulls on the same road, same direction. No knock at all. Weird huh? Well I did this multiple times, and whenever the difference between the maps was >4, the ECU "made" knock.

I used my detcans to confirm that there was actually no knock during all the runs.

 

Evolution 8 - Standard Mods.

 

Looks good. Could maybe be a bit smoother between 120-200 load though.

 

i didnt have an increase in boost, my normally peak and steady hold profile became a little jagged, which is odd, and i have never seen before. but the air was 51 degrees at the maf...so

 

Higher timing can cause lower boost.

 

.
nope, my overall numbers were the same. but normally my boost plot is a nice flat line, this time it was a little jagged in spots, but not on every run. almost a momentary second peak.

 

Well I went to the track today and confirmed that changing the Lo-Octane map is somehow affecting everything else. I tried to upload the logs but I can't seem to figure out how, so if any knows how to upload a .csv file let me and I can show you guys exactly what I'm talking about.

Long story short- with matching Lo and Hi-Octane timing maps I ran more boost, richer AFRs, and got more knock. I dropped th Lo-Octane map 2* in the boost areas and boost dropped almost a full psi in 4th gear, AFRs increased .5, and I got less knock.

FWIW, 1 byte load was virtually the same on both runs so I'm questioning if boost was actually different or if something was just causing my Omni Map sensor to read things differently. It should also be noted that my times were very similar on all my runs so I'm not sure how or if these changes affected my power output at all. I don't know about you guys but this is making no sense to me...

 

Either put them in a .zip archive or just change their extension from .csv to .pdf or something. (Make sure you tell people to change it back to csv, lol)

 

I attached them as a .zip so hopefully it works. Let me know if it doesn't and I'll give it another shot.

 

something isnt right there

 

The ECU richens the fuel mixture under heavy knock; that could be causing the richer AFR since it`s as soon as you hit 12 knocksum that it gets considerably richer, prior to that it was pretty much the same as the other log.

 

I realized I never posted my timing map before. So heres my contribution to this thread. Power mods: Perrin filter, HKS intake, muse LICP, AMS IC and UICP, synchronic BOV (***** style), megan downpipe/testpipe, JIC catback. And saikou michi DC3 catch can. Pretty typical mods list so this map will probably be a good reference for pump gas stock turbo VIII people without cams.



Things to note is this is on 94octane canuck gas (which is surprisingly good). This is unsafe for 91octane (8-12 counts of knock), and very occasionally gives me knock on 93octane east coast US gas. Also its not advisable to run that much timing up top on a IX. I just do it because I have my boost tapering from 23psi (240ish load) to 21psi (200ish load) and it keeps my torque curve flat all the way through. And well...doesn't knock so.... If I happen to pump a bad batch of gas I just trigger alt maps which is pretty safely tuned.

Also I custom scaled the map to my preferences and how my turbo spools. I think its a good idea anyone else to rescale their maps too, you don't need that many low rpm/load cells when they're all the same. But just remember that when you do that your fuel map needs to be redone.

 

I know it.

That makes sense. So at least we have an answer for the change in AFR. Now what about the knock and the boost. Oddly enough, when I did 4th gear pulls the other day while checking the tune, I didn't get any knock. However, my car has always knocked a little in 4th whenever I've been at the track but the counts rarely went above 5.

I wonder if Tephra might have an idea of what's going on since it's a V7 ROM.

 

Which V7 is it?