I have seperation between high/low octane maps, just for this reason. Knock is out-of-control. WHy? I am not going to copy/paste my high octane maps to my low... There is a purpose in this engineering. I am not worried about the timing being retarded. The ecu is doing what it's supposed to be doing.
BUT, do I trust the knock sensor, or trust my diagnostics, as a knock sensor on premo meds? How often do these knock sensors go bad.... yeah, really not that often (never, except if they are broke,i.e. from a team-of-monkeys, changing a clutch).
W/ Mitsuscan, can I trust the knock count? How sensitive are EVO knock sensors w/ External wastegates??
I am crippling this EVO, because I need to figure out this knock situation. Some pulls, on the dyno, there can be 25 counts, causing -10 degrees timing. That , usually, causes about a 110hp drop in performance. But then pull again to make a 400hp+ pull.

I feel my own timing is retarded, need a hard-reset.
Absubtle

 

If the car is tuned right it will never see the lo-octane maps anyway. I think if the lo-octane map needs to be tuned to make the car run "great", the tune isn't "great" to begin with.

 

yah knockbound tune

 

In the event of the "not so great fuel" we all get on occasion it would be wise to make sure the low maps are tuned as for the cars specific mods. We all know that as we mod the cars the farther away from a stock tune we become and need to tune in order to keep the car running top knotch.

I agree that we "should" never see the low map, but it does happen. Thus, why not set yourself up for success and have it tuned too?

The low map is there for safety. If something goes terribly wrong, as it sounds like it is here, a fall back map will ensure you get home and not tear things up too bad.

 

I agree, I never said to make the lo-octane maps the same as the high.

if there is enough knock, for a long enough time to really be dipping into the lo-octane maps, something is wrong with the car. Be it a noisy build tripping the knock sensor, bad tuning, a failed part, running over ball bearings, 87 octane in the tank, etc

absubtle, what is the octane flag when you are seeing so much timing being pulled? This would give us a better idea on just how much it's dipping into the lo-octane tables.

 

Like I have stated before, this car was tuned previously. Ran perfect for couple thousand miles, but then this issue arose.
I am stating this engine is in good health. I put 91 octane, on the dyno, in this period of diagnostics... since we almost ran the car out of fuel.
I hate starting a Thread, due to the fact, that VERY few people read the WHOLE thing, and start adding their own theory, even though, it's irrelevant.

I have stated my problems, I have stated my previouses fixes (and a potential fix to this lying problem) , I have also answered suggested actions, for things to try.

I need to stop the BS, and get down the the QUESTION I ASKED.
Knock sensor? External Wastegate problem? WHy so much knock? But, the next pull be perfect.
I just need some insght, not somebody reading this, and then questioning something retarded, just to get a post.

I understand high octane and low octane maps, I, on purpose, leave low octane maps stock....... huge safety barrier.

I don't know.
I know what I do for living, been doing this for a long time, just need a 'freakin' bone here'.
Absubtle

 

absubtle,

I threw you a couple bones already in this thread (which I have read all the way through), now that you are coming back with the attitude, no mo' bones for you!

The octane flag was another bone, which you chose to ignore.

Actually, here I will help you a little more. Yes it could be your knock sensor, yes it could be a poorly fabbed external wastegate plumbing, yes it could be the car.

I love the new posters coming in here asking questions and when they don't get the perfect answer they want, they throw a hissy fit.

Awesome stuff.

How much ign timing are you using on 91 octane with this car and turbo?

 

no wonder your getting probing replies buddy.

have you gone back and re-read your posts... they don't make much sense. lots of words not much thought gone into getting it onto paper..

if you want a yes/no answer then phrase the question properly, stating the facts in some sort of order...

post a log of the hicup so we can see what you are feeling...

 

Sorry, sorry, I mean no disrespect. Honestly, just been working some long hours, alittle stress, I shouldn't be typing w/ I get home. I apologize.
I haven't re-read my previous posts, I am just progressing, in this progressively-frustrating situation.
Ok, quick recap: Changed plugs, helped, but still had a hiccup. Changed to non-Greddy 9's. The BPR8ES'es did lean out my pre-spool up, but after that, it was the same.
I tried a different set of coil packs, and the problem stopped showing up on the dyno. I would say it was fixed, but I can't say absolutely.
But now, with that resolved, with a complete ignition burn to redline, I did notice a high knock count.
It's not all-the-time, just random, but when knock-count sees... 20 counts, it kills the performance (obviously).
91 octane up here at 6000ft, does pretty well. I can't be hit-and-miss on 2 different dyno pulls, w/n a 8 minute window.
I will log a Mitsulogger log, if anyone will review it. Yes, I need Evoscan, but I get by.
Absubtle
CO

 

Sure it can, that is part of making a solid tune.

What kind of ignition timing are you trying to run when it knocks?

 

0 to 2 degrees, then the knock count pulls me into the High Detontion map, and it goes to -10 degrees... and I still get knock counts.
Absubtle
CO

 

The only time I have seen timing pulled to -10* was with a severe boost leak.

 

One of the guys here at the shop had a 58 trim on MS 109 making over 500whp on stock plugs, the original coils and wires with 60,000 miles on them and had no ignition problems. He has since upgraded to a 35r and makes over 450whp on 91oct with all stock ignition. I firmly believe the problem is somewhere else not in the ignition.

 

Well, a new set of OE coil packs, made the difference (meaning the car car make a full boost pull, w/o a severe lost of ignition). But the high knock count still concerns me. We are still able to reach same boost, w/o adjusting boost controller. I have checked for a boost leak, 4 times now.
But, honestly, even w/ the OEM coil packs, still had a miss, very, very slight, but I dont think anyone would have noticed besides me.

I really dont know on this case. I have tried everything, except pushing it off a cliff.
Absubtle
CO