ECU Closing Throttle

[TiredGXP]

I'm currently modifying a Cobb Stage 1 91 octane tune for my 10 LGT.

Based on my logs, boost was about 1.3 pounds less than commanded (15.2 commanded), so I figured I'd do my own HWG changes. Looking pretty good so far, peak boost is now about 14.6, but is still dipping below 12 psi by 5500 RPM. Need to do a bit more work on the WGDC....

What I noticed in my logs today is that the ECU is closing the throttle after about 6100 rpm, this is knocking boost back to 9.3 by 6500. at this point the TB is only 60% open. While the Stage 1 tune is supposed to hold 12 lbs (+/-) until 7000 RPM, there is no way this can happen if the ECU is closing the throttle.

The only thing I can see to account for this is that the Requested Torque A/B/C tables fall below 350 Nm after 6000 rpm. This should, in turn decrease the "requested torque ratio" in the Throttle Angles A/B/C tables below 1.00, which then commands a smaller throttle opening angle. Does this make sense, or is something else happening?

I'd like to keep WOT until 6500 (not really interested in running the engine up to 7000) anyone have some advice on how to eliminate this?

The options I see are to either increase the requested torque in the Requested Torque tables, or to increase the throttle angle in the Throttle Angles tables. Is there a better way?

TIA

[Bill@COBB]

The x-axis of the target throttle angle table is determined as follows:
req torque/req. torque ratio

So, with the stage 1 map, at WOT at 6400 RPM, req. torque would 320 and req. torque base ratio would be 345:
320/345 = 0.93

If we look target throttle angle table, that closes the throttle to less than 50% (throttle deg/.86)

If you want the throttle target to be WOT in those areas, you can raise the req. torque to 345.

[TiredGXP]

Thanks, Bill

Sounds like I was on the right track with the throttle position issue.