NefMoto > Technical > Tuning > med17.5 boost dropping off at 5,400rpm
Pages: [1]
« previous next »
Author Topic: med17.5 boost dropping off at 5,400rpm  (Read 4875 times)
karlblanch
Newbie
*

Karma: +0/-0
Offline Offline

Posts: 4
« on: May 28, 2018, 09:11:20 AM »
I've had this car a few months now, wrote various different maps, however, I can't stop boost dropping off after 5,400rpm

Is it a mapping problem? or maybe a problem with the n75? or do I need to change boost PID?

This is the first med17.5 i've mapped, so I'm still learning

please find attached the stock, modified file and the vcds log

Any help would be great  Smiley
Logged
vwaudiguy
Hero Member
*****

Karma: +53/-37
Offline Offline

Posts: 2024
« Reply #1 on: May 28, 2018, 01:22:24 PM »
Log N75 duty.
Logged
"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
Beaviz
Full Member
***

Karma: +8/-4
Offline Offline

Posts: 190
« Reply #2 on: May 29, 2018, 02:48:29 AM »
Stock turbo and exhaust? If yes, then it is simply just running out of puff.
Logged
karlblanch
Newbie
*

Karma: +0/-0
Offline Offline

Posts: 4
« Reply #3 on: May 29, 2018, 02:39:35 PM »
I have a 3" downpipe, with stock exhaust, I've seen plenty of k03's holding at least 1 bar to redline, mine drops off to 0.5 bar

Heres a log of the n75
Logged
vwaudiguy
Hero Member
*****

Karma: +53/-37
Offline Offline

Posts: 2024
« Reply #4 on: May 29, 2018, 03:50:36 PM »
How many miles on the turbo? Might be a weak actuator. Most recent DV revision? Doubt it's anything tuning related if you're @ 95% duty and not meeting req. I didn't look though your tune.
Logged
"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
Beaviz
Full Member
***

Karma: +8/-4
Offline Offline

Posts: 190
« Reply #5 on: May 30, 2018, 12:09:04 AM »
Quote from: vwaudiguy on May 29, 2018, 03:50:36 PM
How many miles on the turbo? Might be a weak actuator. Most recent DV revision? Doubt it's anything tuning related if you're @ 95% duty and not meeting req. I didn't look though your tune.

I agree! Not tune related.
Logged
gman86
Hero Member
*****

Karma: +45/-128
Offline Offline

Posts: 705
« Reply #6 on: May 30, 2018, 03:00:09 AM »
"Wrote" multiple maps but not even logging in turbo mode on VCDS?

Your N75 is maxxed. You've ran out of turbo.
Logged
littco
Hero Member
*****

Karma: +52/-7
Offline Offline

Posts: 903
« Reply #7 on: May 30, 2018, 04:59:45 AM »
Quote from: Beaviz on May 30, 2018, 12:09:04 AM
I agree! Not tune related.

I agree too. The turbo is capable of making more than the actuator is capable of holding the boost for so I almost definitely say the actuator/Wastegate is blowing open..

Logged
nyet
Administrator
Hero Member
*****

Karma: +608/-168
Offline Offline

Posts: 12270


WWW
« Reply #8 on: May 30, 2018, 08:50:49 AM »
Or leak.

He didn't mention trims
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:  

Navigation
Personal Tools
  • November 28, 2024, 04:38:22 PM
  • Welcome, Guest. Please login or register.
    Did you miss your activation email?

    Login with username, password and session length
Search
 
Advanced Search
About Disclaimer
All Rights Reserved 2010 Nefarious Motosports
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Page created in 0.023 seconds with 18 queries. (Pretty URLs adds 0s, 0q)