Dev Blog
Forum
Wiki
About
NefMoto
>
Technical
>
Tuning
>
Throttle Cut With Actual Boost Less Than Requested
Pages: [
1
]
« previous
next »
Author
Topic: Throttle Cut With Actual Boost Less Than Requested (Read 3288 times)
Cadensdad14
Full Member
Karma: +8/-1
Offline
Posts: 134
Throttle Cut With Actual Boost Less Than Requested
« on: December 10, 2018, 08:21:51 PM »
Im having issues with a 5120 hacked me7.1.1 551R cutting throttle. 3 bar MAP. Its consistently cutting around 4850 rpms, 180 g/s, 13 to 14 psi. Actual boost is less than requested. Configuring the turbos, the wastegates are running a static 30% WGDC. MAF is rescaled in MLHFM and MLOFS. mshfm matches msdk closely. Car is running a modified gearbox with longer gears. One log is a pull in third, one in second.
The me7logger isnt adjusted for the 5120 so all pressure variables are half what they are.
Doubled KFDLULS and did not have any change. Where do i go next? ESP? Edit the gearing in the ecu to reflect actual gearing?
Logged
vwaudiguy
Hero Member
Karma: +53/-37
Offline
Posts: 2024
Re: Throttle Cut With Actual Boost Less Than Requested
« Reply #1 on: December 10, 2018, 11:34:01 PM »
Do you feel your load request is *roughly* an accurate representation of what is possible with your combination of hardware?
Logged
"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
Cadensdad14
Full Member
Karma: +8/-1
Offline
Posts: 134
Re: Throttle Cut With Actual Boost Less Than Requested
« Reply #2 on: December 12, 2018, 08:09:17 PM »
I feel like the high end load request is reasonable for the target and hardware. I had left this stock while we were running configuration and had CWMDAPP set to 08 for the purpose of configuring the PID. CWMDAPP is Codeword For Configuration Without Torque Structure. I only edited the load request when I ran into the throttle cut issues.
Logged
Cadensdad14
Full Member
Karma: +8/-1
Offline
Posts: 134
Re: Throttle Cut With Actual Boost Less Than Requested
« Reply #3 on: December 14, 2018, 07:22:23 PM »
Here are 4 logs showing the throttle cut. Wastegates at static 30% WGDC. Fuel issue solved for the most part. Gear ratios adjusted for the long ratio gear box. pulls in 2nd. I believe B_lr being 0% is because of the system going open loop with narrowband sensors. Torque structure should be ignored. Could I be hitting a problem at 190 g/s on the MAF? Logs consistently cut throttle at around 4,900.
Logged
nyet
Administrator
Hero Member
Karma: +608/-168
Offline
Posts: 12270
Re: Throttle Cut With Actual Boost Less Than Requested
« Reply #4 on: December 14, 2018, 10:24:37 PM »
Not sure if it is relevant, but ps_w seems pretty far off.
That said, I can't figure out why you would be seeing throttle cut :/
Logged
ME7.1 tuning guide
ECUx Plot
ME7Sum checksum
Trim heatmap tool
Please do not ask me for tunes. I'm here to help people make their own.
Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
Pages: [
1
]
Print
« previous
next »
Jump to:
Please select a destination:
-----------------------------
General
-----------------------------
=> Introductions
=> General Discussion
-----------------------------
Noob Zone
-----------------------------
=> Noob Questions
=> Noob Guides and FAQs
-----------------------------
Technical
-----------------------------
=> NefMoto Software
=> Tuning
===> Documents & Helpers & How To's
===> Community Projects
=> Diagnostics
=> Flashing and Chipping
=> Cluster and Immobilizer
===> ECU EEPROM images
===> Original Cluster dumps
===> Original Cluster dump requests
=> Data Logging
=> Reverse Engineering
=> Communication Protocols
-----------------------------
ECU Files
-----------------------------
=> ECU Definition Files
===> ECU Definition File Requests
=> Original ECU Files
===> Original ECU File Requests
=> Checksum Update Requests
-----------------------------
Vehicles
-----------------------------
=> Vehicle Tech
=> Project Cars
-----------------------------
Regional
-----------------------------
=> Canadian Regional Discussion
=> US Regional Discussion
-----------------------------
Classifieds
-----------------------------
=> For Sale
=> Wanted
=> Services
-----------------------------
Miscellaneous
-----------------------------
=> Off Topic
=> Forum Tech Support
=> Bizarro Messages Posted by Bots and Spammers
Navigation
Home
Help
Login
Register
Personal Tools
November 28, 2024, 03:40:25 PM
Welcome,
Guest
. Please
login
or
register
.
Did you miss your
activation email?
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
Search
Advanced Search
Loading...