Low IAM / low boost / Fine Learning Knock Correction

Posts specific to the 2.5 litre turbo engine

Re: Low IAM / low boost / Fine Learning Knock Correction

Postby Cam_Haug » Fri Oct 13, 2017 9:06 am

I decided to learn how to fix it myself, already had a tactrix, grabbed an innovate wbo2, and got logging.

So far I have pulled a touch of timing from the load areas that were seeing knock, re scaled my maf with the CAI to within 5% for closed loop and open loop areas, followed Kiddo's advice on the fuel trim ranges, adjusted some transition timing and set full load fuelling to about 11.2.

IAM is staying at 1 and no pulled timing, only place i still see fbkc is around 2000 rpm at 1ish load cruising in CL - from what i read this is pretty normal for these cars.

My only other worry is i burn a shitload of oil, its using well over a litre in 5000km with a GS AOS, other than that its running great.

Cam
Cam_Haug
 
Posts: 13
Joined: Sun Nov 27, 2016 11:47 pm
Location: Perth
Car: 07 Liberty GT Spec.b
Real name: Cameron Haug

Re: Low IAM / low boost / Fine Learning Knock Correction

Postby MadmanSean » Fri Oct 13, 2017 9:12 am

Cam_Haug wrote:I decided to learn how to fix it myself, already had a tactrix, grabbed an innovate wbo2, and got logging.

So far I have pulled a touch of timing from the load areas that were seeing knock, re scaled my maf with the CAI to within 5% for closed loop and open loop areas, followed Kiddo's advice on the fuel trim ranges, adjusted some transition timing and set full load fuelling to about 11.2.

IAM is staying at 1 and no pulled timing, only place i still see fbkc is around 2000 rpm at 1ish load cruising in CL - from what i read this is pretty normal for these cars.

My only other worry is i burn a shitload of oil, its using well over a litre in 5000km with a GS AOS, other than that its running great.

Cam


Awesome stuff mate! Well done! :D These engines do have a habit of using oil that doesn't seem excessive to me, just remember to keep an eye on it after doing a spirited drive.
Garage:
2007 Subaru Liberty GT SpecB wagon - RIP
Cosmic Racing Coilovers | Kobe 340 Pump | AVO 3" Inlet | ID1000 | DBA T2 Discs | MU NS400 Pads | Invidia DP | Tomei FPR | Tuspeed BCS | GTX3071 | TGV Delete | W2A Intercooled | Catch Can | 20 Row Trans Cooler | Cusco Stuff | Whiteline Stuffs | Kido Tuned E85 | Empire 3" Exhaust |

1996 Hilux Surf SSRG
Non intercooled 1kz-te | Diesel | Auto | 2" Lift | 18psi MBCS | K&N Filter | 33" Muddies | 105RWkW and a shit tonne of Torque!
User avatar
MadmanSean
 
Posts: 165
Joined: Tue Mar 17, 2015 6:27 pm
Location: Melbourne
Car: 2007 Libert GT SpecB wagon
Real name: Sean
Profile URL: viewtopic.php?f=10&t=33793

Re: Low IAM / low boost / Fine Learning Knock Correction

Postby bigBADbenny » Fri Oct 13, 2017 9:14 am

Awesome :)
Oil use, internal: possibly gummed oil control rings, worn valve guides
External: rear main seal, rocker cover gaskets and half moons, o ring at oil filler base, cam seals...
User avatar
bigBADbenny
 
Posts: 8305
Joined: Tue Oct 04, 2011 6:36 pm
Location: Collingwood, Melbourne
Car: MY07 GT-B 6MT OBP Wagon
Real name: Ben Richards
Profile URL: http://tinyurl.com/agvbzop

Re: Low IAM / low boost / Fine Learning Knock Correction

Postby Cam_Haug » Sun May 06, 2018 2:32 pm

Have some further updates on this, while my IAM is staying at 1.0 now - it def has less power, and seems excessively rich with the re-scaled MAF (i have killed two WBO2 sensors, back of car is sooty) its been bugging me as to why and I even lowered the MAF scaling down manually from what i calced to to be.

Anyway, the past couple of months i have been thinking about patching the ROM with Aijii mod so have been going over my rom further, and I think i have figured it out! Whoever the guys were that tuned the new intake reduced the injector scaling down to 510 instead of scaling the MAF, from what i can tell this would explain the insane fine learning corrections and the richness with my new scaling!

So Im going to change the scaling back to 550 now with my previously calculated MAF scaling, - wish me luck!

Cam
Cam_Haug
 
Posts: 13
Joined: Sun Nov 27, 2016 11:47 pm
Location: Perth
Car: 07 Liberty GT Spec.b
Real name: Cameron Haug

Re: Low IAM / low boost / Fine Learning Knock Correction

Postby jslayz » Sun May 06, 2018 8:44 pm

goodluck!
CURRENT - ATP GTX 3576 - 22psi - 283.7awkw
OLD - Dom 1.5Xtr - Last dyno 254ahkw, previous 238ahkw, first 224awkw.
My journey thread: http://forum.liberty.asn.au/viewtopic.php?f=10&t=15523
My Lib Pics here: http://forum.liberty.asn.au/viewtopic.php?f=10&t=15523&start=570#p370656
User avatar
jslayz
 
Posts: 2810
Joined: Tue Mar 09, 2010 11:32 pm
Location: Perthhhhhh
Car: 2005 Liberty GT Wagon
Real name: J

Re: Low IAM / low boost / Fine Learning Knock Correction

Postby bigBADbenny » Mon May 07, 2018 3:36 pm

I recommend megalog viewer, the paid version has 3D scatter graphs for fuel and spark tables etc...
A small investment to get very granular analysis of your logs...
https://www.google.com.au/search?q=mega ... 20&bih=523
User avatar
bigBADbenny
 
Posts: 8305
Joined: Tue Oct 04, 2011 6:36 pm
Location: Collingwood, Melbourne
Car: MY07 GT-B 6MT OBP Wagon
Real name: Ben Richards
Profile URL: http://tinyurl.com/agvbzop

Re: Low IAM / low boost / Fine Learning Knock Correction

Postby Cam_Haug » Sat May 19, 2018 4:08 pm

Got the log Viewer, very cool.

So this totally worked, AF learning is perfect now.
knock is gone (!) I had to add HEAPS of fuel at the top (first run was 12.2:1 - yikes) still gotta tweak the midrange as it has moved the load points a bit, but over all its amazing, I have been able to add all my timing back so power is waaaaay up again

Also, it had a really weird rev hang that used to drive me nuts, its completely gone.

I honestly don't know why a shop would tune an intake by scaling injectors, but there you go :\

Cam
Cam_Haug
 
Posts: 13
Joined: Sun Nov 27, 2016 11:47 pm
Location: Perth
Car: 07 Liberty GT Spec.b
Real name: Cameron Haug

Re: Low IAM / low boost / Fine Learning Knock Correction

Postby jslayz » Sat May 19, 2018 7:59 pm

Great to hear a result from effort in Cam
CURRENT - ATP GTX 3576 - 22psi - 283.7awkw
OLD - Dom 1.5Xtr - Last dyno 254ahkw, previous 238ahkw, first 224awkw.
My journey thread: http://forum.liberty.asn.au/viewtopic.php?f=10&t=15523
My Lib Pics here: http://forum.liberty.asn.au/viewtopic.php?f=10&t=15523&start=570#p370656
User avatar
jslayz
 
Posts: 2810
Joined: Tue Mar 09, 2010 11:32 pm
Location: Perthhhhhh
Car: 2005 Liberty GT Wagon
Real name: J

Previous

Return to 2.5T engine specific

Who is online

Users browsing this forum: No registered users and 1 guest