1.8, gt2554r, 420cc, ms3, 12.5psi
#4
Moderator
iTrader: (12)
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 20,675
Total Cats: 3,017
Safe means different things to different people. I don't know your duty cycle but I wouldn't consider over 85-90% duty cycle safe. Changes in ambient temperature or pressure from the conditions on the day it was tuned can lead to the ECU demanding more or less fuel at the same rpm and load. With many injectors roughly 85% DC can be the threshold beyond which the injectors don't close before being energized to be reopened. They are therefore always open and no additional fuel can be added if longer opening times are requested by the ECU. This can lean out a mixture at high RPMs and loads.
#5
Steve's right.
Food for thought though: what I've noticed is there's usually quite a big "cushion" between what the MS (and other ecu's) say is "maxed out" and the the actual physical limit.
While some see this at 80%, most can go to 100, I've even gone to 125% on EV6 injectors before actually physically running out of fuel.
Food for thought though: what I've noticed is there's usually quite a big "cushion" between what the MS (and other ecu's) say is "maxed out" and the the actual physical limit.
While some see this at 80%, most can go to 100, I've even gone to 125% on EV6 injectors before actually physically running out of fuel.
Thread
Thread Starter
Forum
Replies
Last Post
Zaphod
MEGAsquirt
47
10-26-2018 11:00 PM
JesseTheNoob
DIY Turbo Discussion
15
09-30-2015 02:44 PM