Join Date: May 2011
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wow....your ecu is sorta guessing, it has nothing to go on. You really need to have that table changed as you go well beyond 3.4 load, that looks like a stock rom table. Mine along the top row goes to 4.75, but if you do that you will basically have to redo the entire table and all the compensation tables to go with it, I am wondering how many of your other tables are left in the stock form. I mean requested torque is just a number, like your boost table uses etc, (even though I changed mine there as well), but your ecu relies heavily upon g/revs based off your maf, and you are well beyond that table so it's sorta guessing at the values using a set of rules.
Step one, get that top row correct extending load out to at least 4.25 and match all your tables in your timing...What does your open loop fueling look like? It's the same deal.
***NOTE, do not just change the row and not change your timing values to match up, even though it would effectively bring your timing down, you still need to try to match it up as close as possible. Jot down what your timing value is at say 5000rpms and 3.4 g/rev, and then match that number by adjusting the entire table accordingly when you change the top row, minus a couple degrees to stay safe.**
Sadly, this is almost a full on tune. I don't mind helping in any way I can, but depends on what you are thinking of doing.
You can get the timing close as I suggested and then run a log, and bump timing up a half degree until you see knock and then back it off about 1.25 degrees if you want max tune.
Man whoever tuned this has very different ideas about tuning than I. The wastegate duty is falling right in there as far as tuning so that's about as close as you can get for tuning out spikes, although with a stiff spring its hard to keep your boost perfect. Since I didn't read this entire thread I am going to assume you have a 3 port, in which case your compensation for +/- should be almost doubled from stock form so it makes quicker adjustments. And..your wastegate with those kind of numbers is already opening before you hit peak boost, my wastegate duty is 100% until 18lbs and then opens up quick, vs slowly creeping open as soon as boost starts coming on. With duty cycles that low the manifold pressure is already cracking the wastegate open at low boost, but with a spring that stiff it would be very hard to tune a spike out leaving it shut till the last second. Making any sense?
But my main question was if it was bottoming out, which it's not.
I would be a bit worried about the feedback knock correction, especially if it doesn't find it's way back to zero quickly. Fine knock isn't good either. They should both be at zero on a full throttle pull on a smooth surface.
Check out this video that Cobb put together. It will tell you what to look for when logging and what's acceptable and unacceptable. You may need a little more learning time with regular driving. You could give it a few days of regular driving and then do a few more logs at full boost. If you still see the knock correction you will need to get a hold of tuner. I'd call him soon to tell him about the knock you're seeing.
cobbtuning's Channel - YouTube
I don't have a whole lot of experience tuning. I just starting working with a friend on his built E85 EVO. He's been tuning using open source and we did a couple of pulls and he showed me a few things to look for. I only logged my car to make sure nothing was wrong and my logs showed 0's for the whole run in the Fine knock and feedback knock correction.
Here's my log. I hope this helps.
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