[WRX_XB9R]

Well I do. Take a look at the logs.
I am attempting to build up some boost. My wastegate is over ported. I was using the rescaled stage 2 v1.10 map. Thanks Wolfplayer
The first log is stock w/ 75% across the board for WDC, second is 80%, third is 85%. You can see KNOCK on the first run. On the second you can see dynamic advanced is pulled big time with negative values. For the third the ECU is already adding timing back in with the same or more being run with higher boost level.
Any ideas on what map to change to keep this from happening again? The timing seems to be coming back up to the same level right away.
The first two runs were within 10 seconds of each other. The third was about 5 minutes later.

[drfrink24]

I'll need to look at some things, but, it seems your total timing at 4000 RPMs is awfully high. The 3500-4500 range is where you are making peak power, too advanced timing at that point will result in knock.

[drfrink24]

I just took a look at my timing on some runs, and while I don't have that RPM range, I do have a data point at 4000, where I'm around 19.5 total timing. Taking a look at your logs, your highest engine load at that point as well. I'd say take some timing away in that area.

I also took a look at what I'm running, v1.04 stage2 base timing. If the ECU happens to pull from dynamic table B, at 4000 RPM, you could actually see 22.94 total advance at the peak VE for our engines.

I'm not sure, but, I think this calls for a

[WolfPlayer]

Originally Posted by drfrink24

I just took a look at my timing on some runs, and while I don't have that RPM range, I do have a data point at 4000, where I'm around 19.5 total timing. Taking a look at your logs, your highest engine load at that point as well. I'd say take some timing away in that area.

I also took a look at what I'm running, v1.04 stage2 base timing. If the ECU happens to pull from dynamic table B, at 4000 RPM, you could actually see 22.94 total advance at the peak VE for our engines.

I'm not sure, but, I think this calls for a

I have found that 4000rpms is a very senstive area ... especially when you up the boost. Be careful around 3800-4000rpms and back off the timing if necessary.

t

[drfrink24]

Knowing that it is a sensitive area for our cars, why would Cobb have a massive timing increase in dynamic table B?

[WolfPlayer]

Originally Posted by drfrink24

Knowing that it is a sensitive area for our cars, why would Cobb have a massive timing increase in dynamic table B?

Cobb hasn't changed the timing tables at all. They left the timing tables COMPLETELY stock. This is a subaru thing. Also, we don't really know what table B does. Don't assume that because there is a large jump there that that means the ECU is set to feed that much advance. Most of the time, my dynamic advance seems to follow DA A ... but can add advance on top of DA A based on the FUJI ignition advance scheme to yield MBT. I am beginning to think that the ECU will feed advance very slowly up to DA B. BUT, that doesn't mean that it starts with DA B ... AND it doesn't mean that it will ever reach DA B.

t

[jays05]

I run 17-17.5 degrees around 4000rpm, I see no problems besides the fact that it is running too much timing in that area. Did you do an ECU reset before these runs? I would expect the motor to knock a bit after a reset when the ECU is running max timing.

I suggest to pull some timing in the 3800-4800 range and add some in the 5000-6000 range (on the dynamic advance A table). Also, decrease the polling interval so there aren't so many duplicate logging entries.

For the over-ported wastegate you could try a helper spring on the wastegate arm, I can send you some pics of my setup if you like.

[WRX_XB9R]

I did just do a ECU reset.
I like the ECU safety factor. After seeing knock the ECU pulled 4 degrees of timing.
What I can not understand is just 3 minutes later I was able to pull more timing 21.5 vs. 19.5 at the same boost level of 17.26. And the same timing 19.5 at more boost 17.26 vs. 17.69 without knock.
I have made a map that pulls some timing out of these areas. More testing is in order.

[WRX_XB9R]

Last nights testing was good. No more knock or negative DAM. Timing is pulling up to about 18 in this area now.

My next thing to fix is a 20-30% throttle stumble at 2400-2550 rpm. The low engine load ignition maps in this area actually drop in value from the cells to the right and left. It think this is the culprit. I will test at lunch and have additioal information.

While driving it basically feels like I pulled back on the throttle and the car just hesitates. If I use enough throttle to increase the engine load there is no problem.

Anyone else find this?