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Old 01-14-2021, 08:31 AM   #1
K3rm1tth3fr0g
Scooby Specialist
 
Member#: 508105
Join Date: Nov 2019
Chapter/Region: NWIC
Location: Greater Seattle Area
Vehicle:
Link G4X flex tuned
02' EJ205 20G 6MT wagon

Default Car pulling timing at WOT

Hey guys,
While I wait for my tuner to review my logs and get back to me, I wanted to ask you all for some advice on some issues I'm having with my tune on my EJ205 w/ a VF39. (Tuner decided to use EJ207 knock control scheme)

I am getting consistent -2.46 fine knock learn when I go into boost almost every time.

Here are some logs: Log 1, Log 2

I know as long as the DAM stays consistent, things are usually okay, however the high RPM, high load, consistent learned knock corrections are worrying me. This has been consistent on this tune for the last few weeks. Should I just clear the ECU and hope it was bad gas? (I did put in some middle of nowhere premium a few weeks ago). I am currently using Lucas octane booster per my tuner's advice but I haven't reset the ECU yet.

Any advice is appreciated!

Car is a 2002 WRX tuned on 92 octane with A V3 Cobb AP by John @ InFront Automotive (tune was determined as a 7/10 in terms of aggression)
EJ205 w/ VF39
Killer B headers
COBB TBE
ID 1050x, Walbro 255
STI TMIC
2005 4.44 JDM 5MT
etc.
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Last edited by K3rm1tth3fr0g; 01-14-2021 at 11:48 AM.
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Old 01-15-2021, 02:25 AM   #2
Fino
Scooby Newbie
 
Member#: 417685
Join Date: Apr 2015
Chapter/Region: Tri-State
Location: Pennsylvania
Vehicle:
'03 V7 EJ207, 6MT
Sonic Yellow

Default

You should get a wideband O2 sensor and log that too. Your calling for an AFR of 12 at WOT and your front O2 sensor is reading a constant 11.25 so you're likely outside of it's range and your actual AFR is unknown. Your MAF table probably needs some adjusting. Is the timing you logged total timing or just base?
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Old 01-15-2021, 08:39 AM   #3
K3rm1tth3fr0g
Scooby Specialist
 
Member#: 508105
Join Date: Nov 2019
Chapter/Region: NWIC
Location: Greater Seattle Area
Vehicle:
Link G4X flex tuned
02' EJ205 20G 6MT wagon

Default

Quote:
Originally Posted by Fino View Post
You should get a wideband O2 sensor and log that too. Your calling for an AFR of 12 at WOT and your front O2 sensor is reading a constant 11.25 so you're likely outside of it's range and your actual AFR is unknown. Your MAF table probably needs some adjusting. Is the timing you logged total timing or just base?
Thanks for the reply!

That makes sense that I'll probably need a wideband.

As for logged or base timing, how do I determine which it is? I'm using the default AP logging criteria.
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Old 03-03-2021, 09:39 PM   #4
K3rm1tth3fr0g
Scooby Specialist
 
Member#: 508105
Join Date: Nov 2019
Chapter/Region: NWIC
Location: Greater Seattle Area
Vehicle:
Link G4X flex tuned
02' EJ205 20G 6MT wagon

Default

Update:

After sending logs back and fourth with my tuner and running more tanks through the car the -2.11 fine knock disappeared and the car is as knock free as can be (barring the occasional - 2.11 feedback knock on throttle change).
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