BoostedBeaver
Moderator
- 951
- 265
- Aug 15, 2009
-
Augusta,
Georgia
Ok, so I finally got enough injector to push the boost past 24lbs. I am running BPR7es that are gaped to .026 with magnacore 8mm wires with stock coil pack that passes the resistance test.
The first log is the pull just before my problem occurs. This was taken maybe 15min before my problem log. It was a nice clean pull. You will notice that the AFR is actually a little lower than commanded due to the E85 grade change. No worries, I was going to change after a 2nd log confirmed it. The boost does spike in the 4500 range to 26 psi with no problems. This was a strong pull and felt pretty good.
The next two logs will contain the problem. All three logs where taken within an hour. The only change that was made is one increment up on duty cycle in the 4500 and up 3rd gear row in the WGS tab. Around 4500 in both logs the car feels like it hits the rev limit. It stumbles really hard. Of course I let out. I checked to make sure the rev limit did not change and NLTS was not activated. The log shows a lean spike while studdering like a misfire. The injector duty cycle does not rapidly change and no knock is present.
When the problem kicks in it seems to be within the same parameters as the above log. I am guessing that since the pressure is continuing to rise(not fall to 23-24lbs like the first log), the cylinder pressure is causing spark blow out?? It happens each time around 4500rpm, 6.27 loadfactor, 25-26lbs of boost, good battery voltage, constant duty cycle, and solid AFR's. The problem does not persist if boost is turned back down. I have never seen blowout on a log and was wondering if this was it??? Any suggestion or personal preference of what gap you run is also greatly appreciated.
The first log is the pull just before my problem occurs. This was taken maybe 15min before my problem log. It was a nice clean pull. You will notice that the AFR is actually a little lower than commanded due to the E85 grade change. No worries, I was going to change after a 2nd log confirmed it. The boost does spike in the 4500 range to 26 psi with no problems. This was a strong pull and felt pretty good.
The next two logs will contain the problem. All three logs where taken within an hour. The only change that was made is one increment up on duty cycle in the 4500 and up 3rd gear row in the WGS tab. Around 4500 in both logs the car feels like it hits the rev limit. It stumbles really hard. Of course I let out. I checked to make sure the rev limit did not change and NLTS was not activated. The log shows a lean spike while studdering like a misfire. The injector duty cycle does not rapidly change and no knock is present.
When the problem kicks in it seems to be within the same parameters as the above log. I am guessing that since the pressure is continuing to rise(not fall to 23-24lbs like the first log), the cylinder pressure is causing spark blow out?? It happens each time around 4500rpm, 6.27 loadfactor, 25-26lbs of boost, good battery voltage, constant duty cycle, and solid AFR's. The problem does not persist if boost is turned back down. I have never seen blowout on a log and was wondering if this was it??? Any suggestion or personal preference of what gap you run is also greatly appreciated.
Post back after the new plugs. 
