Megasquirt Timing and Fuel Map Thread

[Jaxx_]

I believe that yes, the tune I sent you has ego on. The car has not run with it yet. I was just getting it ready. I do not believe the car was tuned with the afr target incorporated but it looks like the table is set up for it? I'm not sure what that will do. In your opinion would it be ok to turn on ego control and not incorporate the afr table.?

I can email the tuner and ask if it was or was not tuned with it on. He has been open to questions even after getting this done 6+ months ago.

From what it looks like, I don't think it was tuned with it on. The AFR target values are too far from what the logs are. Also, the high boost areas don't match up for what it was tuned for. The AFR targets are generally leaner.

Because most of the AFR targets are leaner, if you turn on EGO now without modifying the table you will effectively be pulling 10% fuel everywhere. Basically, a less safe tune.

[turbski]

yes, the tune I sent you has ego on. The car has not run with it yet. I was just getting it ready. I do not believe the car was tuned with the afr target incorporated but it looks like the table is set up for it? I'm not sure what that will do. In your opinion would it be ok to turn on ego control and not incorporate the afr table.?

I can email the tuner and ask if it was or was not tuned with it on. He has been open to questions even after getting this done 6+ months ago.

[Jaxx_]

My Ego is currently off. It was advised that i do not turn the authority up past 10% which i understand.
I would have to look at the tune again as im at work right now, but i do not think i have the tune programmed to incorporate my Target AFR table and am unsure what i would actually have to do to use it, if i even need to

If your tune is close, it probably won't even need more than 5%. In MS3 there are EGO authority tables that allow you to dictate depending on the area of the map you're in—effectively blending into open loop if you'd like to think of it that way.

I don't remember if your tune had EGO on, but I thought it did. Perhaps I'm recalling incorrectly. If you incorporate AFR target your VE values will need to change. Basically if you don't include it, your VE table will be based on 14.7; this means that if you are at 100VE at 14.7, you'll have to add more to get to 12.5, for example. The advantage of tuning while incorporating AFR target is that you only tune the VE table "once" and then can adjust your AFRs by the target table alone, rather than having to retune VE values at all. Since your car was tuned without it on, you'd effectively have to tune it again if you turned it on.

As you know, having correct AFR targets related to your tune also allows EGO to pull or add fuel in the correct direction.

[turbski]

Regarding EGO control and AFR targets, you need to adjust them so that they are inline with what the tuner wanted to aim for. It looks like 11.5 or 11.3 in boost. Adjust your target AFR table.



When you get better weather, do a log of the 3rd gear issue you have. Drivability areas of a tune are the hardest part of the tune, imo.[/QUOTE]

My Ego is currently off. It was advised that i do not turn the authority up past 10% which i understand.
I would have to look at the tune again as im at work right now, but i do not think i have the tune programmed to incorporate my Target AFR table and am unsure what i would actually have to do to use it, if i even need to

[turbski]

correct, I was able to download megalog viewer MS lite (instead of HD lite) and look at a full log and that was the first thing i noticed. On the dyno sheet that was posted from the tuners computer its showing roughly 8psi at peak.

I have run into this issue before but never got it resolved. I have tested the MAP sensor with key on, engine off and it reads 98.9 kpa. Correct from what I understand. The log is showing over 190kpa in full boost.

When driving the car my mechanical boost guage usually maxes out somewhere around 10psi (hard to get a great read on it when its pulling)

The Tuner says he is seeing 8psi. I have my boost control solenoid disabled. I dont need the car to make more power, But i am unsure what spring is in the wastegate. Im gonna assume around 11psi+-.
Am I missing something? Is there something in the log or MSQ that would tell us different?

[ForcedFirebird]

You said earlier in the thread you were making 320hp/320tq @8psi. The log labeled "pull9" says otherwise. 198kpa (closer to 13psi) and 19.8° at 5840rpm. After looking at the logs, I agree with Jaxx, the timing isn't as bad as I suspected with the tables you posted, also agree the fuel needs to be dialed in a little more.

Seems the upper tables are flat because those cells haven't been reached yet. Interpolated tables look nice, but don't always translate to what the engine wants.

[turbski]

Thanks again for reviewing the info. Ya went way above and beyond. Aside from the blow by issue the car does run well. Its good to know the tune looks good as I can't review the logs at this time. I may pull some timing to be safe. Hopefully the new arps will hold the head down haha

[Jaxx_]

I personally think the timing is probably a bit aggressive if the head was lifting! Nonetheless, if the tuner thinks that it's the best timing, OK. Stock head bolts? With that said, the timing table doesn't look too bad to me.

I was surprised to see how well the fuel was tuned—despite the relatively flat upper fuel areas. I do think that it could use more fuel in the transition cells from just above 100kpa to full boost. It goes leaner than I'd like in that area. However, I'm always quite conservative in my tunes, so...

Regarding EGO control and AFR targets, you need to adjust them so that they are inline with what the tuner wanted to aim for. It looks like 11.5 or 11.3 in boost. Adjust your target AFR table.



When you get better weather, do a log of the 3rd gear issue you have. Drivability areas of a tune are the hardest part of the tune, imo.

[turbski]

Jaxx, thanks for all the help this morning. huge help! hopefully nothing is to sketchy in what we see. the first couple pulls was out of control boost. the last couple was lifting the head and dumping coolant

[Jaxx_]

I haven't looked at them yet, but here are turbski's MSQ and logs.

http://jaxxd.com/e30/turbski/

[turbski]

test

[Jaxx_]

Perhaps try uploading the log to datazap.me? I don't know if it'll support MSL—if it doesn't you could attempt to change the file name to .CSV. worst case, you can email it and I'll host it

[turbski]

still fighting with this. I can only view a part of the log as I only have mega log viewer lite. is there a way to convert the msl so I can upload directly?

[Jaxx_]

Also save the .MSQ (tune). You can upload them onto Google docs and share them here.

[turbski]

ok, I got the files. didn't think he would still have them. how do I upload them for viewing. its currently an msl