Injector duty near 100% up top - EvolutionM - Mitsubishi Lancer and Lancer Evolution Community



General Engine Management / Tuning Forum Discuss general EMS tuning concepts that do not pertain to a specfic brand or product.

Injector duty near 100% up top

Reply
 
 
 
Thread Tools Search this Thread
Old Sep 7, 2017, 12:00 PM   #1
Evolving Member
Thread Starter
 
D1andonlyantman's Avatar
 
Join Date: Jun 2014
Location: Near Cambridge, UK
Posts: 255
Thanked 1 Time in 1 Post

Drives: Evo IX FQ-320... Well it was 320 anyway ;-)

Injector duty near 100% up top

Hi everyone. My injector duty is near 100% at redline. I've been tuning my ix and it was too rich there but even with the afr back to 11.5 or thereabouts I'm still in the 90s. Is that normal or could my hardwired walbro 255 be tired?

Thanks
Offline
 
Reply With Quote
Old Sep 8, 2017, 07:19 PM   #2
Evolving Member
 
Join Date: Mar 2013
Location: in a garage
Posts: 455
Thanked 11 Times in 11 Posts

Drives: Lancer

Your fuel pressure will be all cocked up, as in too high at low load and too low at high load.
That's what happens when you hard wire the pump.
Then you'll be asking why you blew the engine.
Offline
 
Reply With Quote
Old Sep 8, 2017, 07:31 PM   #3
Evolved Member
 
4b11slayer's Avatar
 
Join Date: Nov 2015
Location: Santa Ana
Posts: 1,393
Thanked 65 Times in 65 Posts

Drives: 2004 rs ct9a

90 is ok id say. 100 doesnt leave you much room for error. Get some injectors.
Offline
 
Reply With Quote
Old Sep 9, 2017, 01:21 AM   #4
Evolving Member
Thread Starter
 
D1andonlyantman's Avatar
 
Join Date: Jun 2014
Location: Near Cambridge, UK
Posts: 255
Thanked 1 Time in 1 Post

Drives: Evo IX FQ-320... Well it was 320 anyway ;-)

Quote:
Originally Posted by RightSaid fred View Post
Your fuel pressure will be all cocked up, as in too high at low load and too low at high load.
That's what happens when you hard wire the pump.
Then you'll be asking why you blew the engine.
Isn't that what the fpr is for? I didn't touch the map for ages after I hardwired the pump but it was driving fine. Now I've started working on the map and the afr is even more consistent.
Offline
 
Reply With Quote
Old Sep 9, 2017, 12:53 PM   #5
EvoM Guru
iTrader: (8)
 
razorlab's Avatar
 
Join Date: Aug 2003
Location: Alameda, ca
Posts: 10,426
Thanked 152 Times in 134 Posts

Drives: a laptop connected to your ECU.

Quote:
Originally Posted by D1andonlyantman View Post
Isn't that what the fpr is for? I didn't touch the map for ages after I hardwired the pump but it was driving fine. Now I've started working on the map and the afr is even more consistent.
Pay no attention to him.
Offline
 
Reply With Quote
Old Sep 9, 2017, 05:43 PM   #6
Evolving Member
 
Join Date: Mar 2013
Location: in a garage
Posts: 455
Thanked 11 Times in 11 Posts

Drives: Lancer

Quote:
Originally Posted by razorlab View Post
Pay no attention to me.

100% IDC on a logger is closer to 80% because it reports wrong.
It's the difference between calculated and actual IDC.
Offline
 
Reply With Quote
Old Sep 9, 2017, 06:06 PM   #7
EvoM Guru
iTrader: (8)
 
razorlab's Avatar
 
Join Date: Aug 2003
Location: Alameda, ca
Posts: 10,426
Thanked 152 Times in 134 Posts

Drives: a laptop connected to your ECU.

Quote:
Originally Posted by RightSaid fred View Post
100% IDC on a logger is closer to 80% because it reports wrong.
It's the difference between calculated and actual IDC.
Yea, why would we trust injector pulse width. That's just silly
Offline
 
Reply With Quote
Old Sep 9, 2017, 06:34 PM   #8
Evolving Member
 
Join Date: Mar 2013
Location: in a garage
Posts: 455
Thanked 11 Times in 11 Posts

Drives: Lancer

Quote:
Originally Posted by razorlab View Post
Yea, why would we trust injector pulse width. That's just silly


Of course it is..........unless you've double checked using other means......it's wrong.

Just like timing advance?


Obviously you've got no idea.


The IDC is a calculated value, not a directly measured value.
It's calculated from IPW and RPM.
IPW has 2 different values. one is the theoretical one, the other is the real one, the one with adder applied (deadtime)
IDC is derived from the actual IPW so it always displays higher than it really is.
Offline
 
Reply With Quote
Old Sep 9, 2017, 06:38 PM   #9
EvoM Guru
iTrader: (8)
 
razorlab's Avatar
 
Join Date: Aug 2003
Location: Alameda, ca
Posts: 10,426
Thanked 152 Times in 134 Posts

Drives: a laptop connected to your ECU.

Quote:
Originally Posted by RightSaid fred View Post

Obviously you've got no idea.
Now aren't you just a barrel of laughs...
Offline
 
Reply With Quote
The Following User Says Thank You to razorlab For This Useful Post:
whtrice (Sep 16, 2017)
Old Sep 13, 2017, 04:27 PM   #10
Evolving Member
Thread Starter
 
D1andonlyantman's Avatar
 
Join Date: Jun 2014
Location: Near Cambridge, UK
Posts: 255
Thanked 1 Time in 1 Post

Drives: Evo IX FQ-320... Well it was 320 anyway ;-)

I was actually going to reply to this because I'm planning on finishing my map this weekend but am not really any clearer on where I stand with the IDC. So what is the verdict? Let's say when my map is done my idc touches the 90s right up top of the rpm. Is that ok because it's just a calculated number that's probably a bit off anyway and I'll rarely rev it that high, or should I consider winding back the boost or something?
Offline
 
Reply With Quote
Old Sep 13, 2017, 08:10 PM   #11
Evolved Member
iTrader: (7)
 
Tuxevo's Avatar
 
Join Date: Aug 2010
Location: Silver Spring, MD
Posts: 506
Thanked 5 Times in 3 Posts

Drives: WW IX RS

You can safely listen to Razorlab. He been tuning longer than most have been driving. You'll want bigger injectors if you plan on making more power, but for now you're fine.
Static open for injectors in evoscan is something like 110%
Offline
 
Reply With Quote
Old Sep 13, 2017, 11:20 PM   #12
Evolving Member
 
Join Date: Mar 2013
Location: in a garage
Posts: 455
Thanked 11 Times in 11 Posts

Drives: Lancer

Quote:
Originally Posted by Tuxevo View Post
, but for now you're fine.
Static open for injectors in evoscan is something like 110%

Depends on the ROM but some of them are safe at a reading of 118%.

Obviously 118% isn't a real number, nor any other number greater than 100%.
Offline
 
Reply With Quote
Old Sep 14, 2017, 12:03 AM   #13
Evolving Member
Thread Starter
 
D1andonlyantman's Avatar
 
Join Date: Jun 2014
Location: Near Cambridge, UK
Posts: 255
Thanked 1 Time in 1 Post

Drives: Evo IX FQ-320... Well it was 320 anyway ;-)

Ok Cool, I'll keep an eye on it. I'm pretty sure it won't be past early 90s so should have a bit of wiggle room.
thanks
Offline
 
Reply With Quote
Old Sep 14, 2017, 06:25 PM   #14
Newbie
 
Join Date: Aug 2017
Location: florida
Posts: 18
Thanks: 0
Thanked 3 Times in 3 Posts

Drives: Evo

what type of injector do you have
Offline
 
Reply With Quote
Old Sep 15, 2017, 12:06 AM   #15
Evolving Member
Thread Starter
 
D1andonlyantman's Avatar
 
Join Date: Jun 2014
Location: Near Cambridge, UK
Posts: 255
Thanked 1 Time in 1 Post

Drives: Evo IX FQ-320... Well it was 320 anyway ;-)

Quote:
Originally Posted by shutterboy10 View Post
what type of injector do you have
standard injectors with the standard 80 series turbo and basic bolt-ons.
Offline
 
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Another Busted Throw out Bearing and ACT clutch questions Konradj Evo Engine / Turbo / Drivetrain 12 Sep 13, 2017 12:35 PM
Evo IX Another Busted Throw out Bearing and ACT clutch questions/decisions Konradj Evo Engine / Turbo / Drivetrain 1 Sep 10, 2017 09:52 PM
Injector Duty Cycle logging Chet3215 Evo X Engine Management / Tuning Forums 2 Jul 24, 2016 11:51 AM
Injector Duty Cycle ridenrunwv Evo Engine / Turbo / Drivetrain 2 Sep 29, 2015 09:59 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -7. The time now is 05:55 AM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: