Pages: 1 [2]
Author Topic: Boost greater than 1.5 bar  (Read 20009 times)
Tony@NefMoto
Administrator
Hero Member
*****

Karma: +130/-4
Offline Offline

Posts: 1389


2001.5 Audi S4 Stage 3


« Reply #15 on: October 12, 2010, 11:04:27 AM »

I thought that stage 3 B5 S4s who run that high boost have a hardwired (open loop) N75 duty cycle at WOT.

In partial throttle there is still PID control, correct?

These cars are still controlled using the N75 linearization map, and the PID controller. The way they make it "open loop" at WOT is by tuning the N75 linearization map at the loads you see at WOT.
Logged

Remember you have to log in if you want to see the file attachments!
Info or questions, please add to the wiki: http://www.nefariousmotorsports.com/wiki
Follow NefMoto developments on Twitter: http://twitter.com/nefmoto
m1ke
Newbie
*

Karma: +0/-0
Offline Offline

Posts: 4


« Reply #16 on: March 12, 2011, 07:37:39 PM »

The problem is the code in the ECU is only written to handle up to 2550mbar. So even if you rescale the reading of the signal from the MAP sensor, if can't represent a value larger than 2550. There is no easy way to make the ECU handle a MAP reading larger than 2550mbar.

Have you ever tried not increasing the 2550mbar value but decreasing the voltage at which 2550 occurs, the sensor is linear and so these numbers should just calculate larger map with higher voltages.?
Logged
nyet
Administrator
Hero Member
*****

Karma: +604/-166
Offline Offline

Posts: 12232


WWW
« Reply #17 on: March 12, 2011, 11:30:52 PM »

Have you ever tried not increasing the 2550mbar value but decreasing the voltage at which 2550 occurs, the sensor is linear and so these numbers should just calculate larger map with higher voltages.?

see this thread

http://www.nefariousmotorsports.com/forum/index.php?topic=263.0title=

and here

http://www.nefariousmotorsports.com/forum/index.php?topic=110.0title=
Logged

ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

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 experience.
Pages: 1 [2]
  Print  
 
Jump to:  

Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Page created in 0.014 seconds with 16 queries. (Pretty URLs adds 0s, 0q)