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01-23-2021, 03:41 PM | #1 |
Scooby Newbie
Member#: 519477
Join Date: Oct 2020
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DAM dropping Need some help
Can someone please take a look at my Data log and maybe point me in the right direction.
I have an 03 wrx stage 2, recently my DAM dropped to 8 after a 3rd gear pull. It came back up to 11 shortly after. I reset the ECU and started back at 12 this then jumped to 16 but then immediately fell back to 15. I wasnt logging when this happened but have logs from before and after, pretty new to these cars and just looking for a good starting point as to where to look for issues. This happened on a low tank of gas, light was not yet on. Maybe dirty gas tank/water?? I have a compression test kit and will be doing that this weekend just to see where this motor stands. Any help is appreciated. *Most Current https://docs.google.com/spreadsheets...gid=2027524553 *Dam Between 10-11 https://docs.google.com/spreadsheets...gid=1518419979 *After ECU Reset https://docs.google.com/spreadsheets...gid=1173335110
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01-24-2021, 08:42 PM | #2 |
Scooby Specialist
Member#: 29292
Join Date: Nov 2002
Chapter/Region:
SCIC
Location: Orange County CA
Vehicle:2004 WRX wagon silver |
get a good tank of gas and see if it raises your dam
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01-25-2021, 01:11 AM | #3 |
Scooby Newbie
Member#: 519477
Join Date: Oct 2020
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01-25-2021, 06:18 PM | #4 |
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 |
My dam dropped with Costco gas and my tuner said it's significantly worse than Shell and 76 in regard to additive FWIW
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01-27-2021, 01:19 PM | #5 | |
Scooby Newbie
Member#: 519477
Join Date: Oct 2020
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Quote:
Interesting, from what I had read I thought it was comparable to shell. Too bad cause you def can’t beat the price. I’ll run this tank down and see what happens when I switch. Thanks for the info |
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04-19-2021, 07:10 PM | #6 |
Scooby Newbie
Member#: 519477
Join Date: Oct 2020
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Ok so I have now gone through 2 tanks of Shell gas and my DAM is still dropping. Where should I start to try to get this resolved. This is my daily driver and without an AP I wouldn’t even know this was happening. Idle fine, not losing any MPG’s not throwing any codes. I’d like to get this resolved just looking for some direction.
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04-19-2021, 07:18 PM | #7 | |
Scooby Newbie
Member#: 519477
Join Date: Oct 2020
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Quote:
Just for added info. I have put on an invidia catless up pipe, invidia catted dp, and invidia n1 race catback. I am running the stage 2 ACN tune due to the Cali gas. It seems the DAM drops when I’m under boost in the higher rpm range or when barely on the gas at cruising speeds in 3rd-5th. This is My commuter and if I baby it I can keep at 16 all day. If I romp on it sometimes it’s fine, other times I’ll look down and major drop in DAM. It hit 0 the other day and found that my oil was about a quart low. Had no idea I was burning so much oil. Maybe 1500 since last oil change. No leaks. Fwiw. Appreciate any help. |
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04-19-2021, 08:49 PM | #8 |
Scooby Specialist
Member#: 29292
Join Date: Nov 2002
Chapter/Region:
SCIC
Location: Orange County CA
Vehicle:2004 WRX wagon silver |
well that is where detonation is the most dangerous.. I would get a protune. the off the shelf stuff is questionable. how long have you had your tune. I would try a couple of gallons of E85 to see if that helps
Last edited by subaru_gc8; 04-19-2021 at 08:55 PM. |
04-19-2021, 09:18 PM | #9 |
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 |
Protune or go back to stock. Boostleak test it.
Have your tuning shop diagnose the car if you aren't comfortable doing it. |
04-19-2021, 10:24 PM | #10 |
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Join Date: Oct 2020
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Ok sounds good. I have a good tuner near my work that I will contact tomorrow.
Current tune is just an OTS stage 2 and I’ve only been running it since doing exhaust upgrades. |
04-19-2021, 10:25 PM | #11 | |
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Quote:
Is throwing in some E85 a safe option? How many gallons per 91 would you say? |
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04-19-2021, 11:16 PM | #12 | |
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 |
Quote:
Its way more resistant to knock and it will effectively raise your octane. But if you're seeing DAM drop when you go into boost consistently, I would bet that it is a mechanical problem rather than bad gas. |
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04-20-2021, 10:09 AM | #13 |
Scooby Specialist
Member#: 385256
Join Date: Mar 2014
Chapter/Region:
NESIC
Vehicle:'18 Giulia QV '21 Giulia Q4 |
Do you have the intercooler shroud and do you have the intercooler mounted to both brackets on either side of it? If not and you have gaps around the ic then that may cause dam to drop. Likewise if youre looking for your next upgrade consider an sti intercooler.
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04-20-2021, 10:51 AM | #14 | |
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 |
Quote:
There are guys I know running non-scooped Impreza hoods with no direct airflow over their intercooler and they are running stock top mounts and yeah they have higher temps than if they were using the WRX hood but their DAM doesnt drop. I don't think a gap in the shround would drop the DAM. +1 for 08+ STI TMIC as an upgrade tho. I just doubt your DAM drop is related to this. |
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04-20-2021, 11:18 AM | #15 |
Scooby Specialist
Member#: 385256
Join Date: Mar 2014
Chapter/Region:
NESIC
Vehicle:'18 Giulia QV '21 Giulia Q4 |
This.
I had this problem on a stage 2 wrx and fixing the intercoooler helped, upgrading the intercooler helped even more. there are many factors to consider with your friend isolating their tmic from airflow. are they running an ots tune? was the vehicle tuned in that condition? what kind of gas is being used? the list of questions goes on. the reason its always recommended that you get a protune is because an OTS tune isnt tailored to whatever peculiarities a motor might have. even between two identical setups one might make a little more power than the other for a reason that isnt obvious or easy to identify. The best you can hope to do in OPs situation is eliminate as many variables as possible, and being meticulous and specific about the way the different pieces of the vehicle are installed helps to ensure this. I am speaking from first hand experience on this. It may not solve the problem, but if its not installed correctly its not installed correctly and suggesting that he half ass it doesnt really get him any closer. These things are engineered this way for a reason. Last edited by 86Dreams; 04-20-2021 at 11:25 AM. |
04-20-2021, 11:35 AM | #16 |
Scooby Newbie
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Join Date: Oct 2020
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Thanks for all the input guys. I will check over all fittings and check for anything suspicious as well as perform a boost leak test this weekend.
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04-20-2021, 11:48 AM | #17 | |
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 |
Quote:
There is one guy I know running a COBB OTS stage 2+ setup with a scoopless impreza and he has rock solid DAM w/ only occasional fine and feedback knock FWIW I agree tho that installing parts correctly yields the best results obviously. |
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04-20-2021, 01:08 PM | #18 | |
Scooby Specialist
Member#: 385256
Join Date: Mar 2014
Chapter/Region:
NESIC
Vehicle:'18 Giulia QV '21 Giulia Q4 |
Quote:
do you know if its a stage 2+ for acn, 91 or 93? if hes using like an acn map and putting in 93 that could explain it, the igntion timing on the acn maps was quite a bit lower iirc |
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04-20-2021, 01:21 PM | #19 | |
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 |
Quote:
He doesn't track the car but he definitely gets it nice and hot. |
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04-20-2021, 03:56 PM | #20 |
Scooby Newbie
Member#: 519477
Join Date: Oct 2020
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Spoke to M45 auto near where I live and will be getting a tune from Travis with Snail tuning in May. Over the phone they said the issue is most likely that I’m running all invidia parts and Cobb OTS isn’t liking it.
As far as intercooler I will try to get a new one by tune day. Any other things I should add to help with tuning? I was considering an EBCS... is there a tuner preferred EBCS? |
04-20-2021, 04:51 PM | #21 |
Scooby Specialist
Member#: 395793
Join Date: Jul 2014
Chapter/Region:
Tri-State
Location: SLC and Lake Placid
Vehicle:2005 92x Aero Beige |
Ask your tuner which EBCS they recommend. They all have various parts they prefer to use for those types of items
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04-20-2021, 05:16 PM | #22 | |
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 |
Quote:
And a used oem 08+ Sti top mount will outperform almost every aftermarket top mount in the real world just fyi Last edited by K3rm1tth3fr0g; 04-20-2021 at 06:25 PM. |
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04-20-2021, 05:54 PM | #23 |
Scooby Specialist
Member#: 395793
Join Date: Jul 2014
Chapter/Region:
Tri-State
Location: SLC and Lake Placid
Vehicle:2005 92x Aero Beige |
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04-20-2021, 06:01 PM | #24 |
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 |
I'll try and find the thread but it was mentioned by killer B directly and it was comparing a Grimmspeed top mount vs the 08+ STI top mount in regard to real world IATs overtime. and also Dom who makes the cooling mods said that as well in one of his videos on YouTube. In actual real world non dyno runs, the OEM tmic is better than 99% of top mounts available. Almost every aftermarket intercooler manufacturer advertises their gains on a dyno not on the road, the road and the real world is where the OEM tmic performs better.
Last edited by K3rm1tth3fr0g; 04-21-2021 at 08:48 AM. |
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