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Old 02-02-2018, 05:06 PM   #1726
undyjr
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Originally Posted by gn4rwhals View Post
Mishimoto cans?

I think you posted before that the hoses and fitting were garbage.
Yessir, I enjoyed reengineering the hoses and fittings. A copper tubing bender and 1/2 ACR copper tubing allowed me to duplicate the Mishimoto bends. Slides right in the hose. The same tubing makes a swedged bushing for the PCV valve.
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Old 02-07-2018, 09:57 PM   #1727
Scoobman20
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Default Lean at initial boost

Hey everyone. I'm struggling to figure out where this lean spike is coming from when I reach boost. I replaced the header gaskets and j-pipe gasket thinking it could be an exhaust leak above the O2 sensor, but no improvement. I also looked over the intake and intercooler couplings. Could this be blow-by from AVCS or some other leak? My other concern is my calculated load seems higher than quite a few logs I'm seeing with similar mods.

Here is the OTS Stage2 Big SF - https://datazap.me/u/scoobman20/stag...og=0&data=8-26

Here is the same map with an OL MAF re-cal and the CL delay reduced and CL map high load changed slightly (better but the spike is still there in the beginning) - https://datazap.me/u/scoobman20/stag....91&tmax=99.60

Mod List:
Catless J-pipe
3" Catback
Cobb 3" intake
TGV delete
EGR delete
Restrictor pill delete
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Old 02-07-2018, 10:10 PM   #1728
gn4rwhals
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Have you thought about getting a 3 port to contain your overboost? Seems to happen after it spikes then reaches target.
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Old 02-07-2018, 10:35 PM   #1729
Scoobman20
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Originally Posted by gn4rwhals View Post
Have you thought about getting a 3 port to contain your overboost? Seems to happen after it spikes then reaches target.
Interesting observation and thanks for the suggestion, but I don't understand why exceeding the target boost would cause higher values than the commanded AFR. Maybe you know something I don't.
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Old 02-08-2018, 12:21 AM   #1730
gn4rwhals
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No just noticed it, figured I'd mention it.

Are you running a modified COBB map for the TGV/EGR deletes?
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Old 02-08-2018, 12:25 AM   #1731
Scoobman20
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No just noticed it, figured I'd mention it.

Are you running a modified COBB map for the TGV/EGR deletes?
Yes but only matched the open and closed tgv related maps and disabled all the codes.
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Old 02-08-2018, 07:02 AM   #1732
ericdet
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Originally Posted by Scoobman20 View Post
Hey everyone. I'm struggling to figure out where this lean spike is coming from when I reach boost. I replaced the header gaskets and j-pipe gasket thinking it could be an exhaust leak above the O2 sensor, but no improvement. I also looked over the intake and intercooler couplings. Could this be blow-by from AVCS or some other leak? My other concern is my calculated load seems higher than quite a few logs I'm seeing with similar mods.

Here is the OTS Stage2 Big SF - https://datazap.me/u/scoobman20/stag...og=0&data=8-26

Here is the same map with an OL MAF re-cal and the CL delay reduced and CL map high load changed slightly (better but the spike is still there in the beginning) - https://datazap.me/u/scoobman20/stag....91&tmax=99.60

Mod List:
Catless J-pipe
3" Catback
Cobb 3" intake
TGV delete
EGR delete
Restrictor pill delete
I don't see a spike. I see one log that is lean the entire time and another that is lean for a good portion. The only spike I see anywhere is the Command spike at CL/OL switch which is common. I think you're looking at the wrong end in terms of problems. It appears you have either a scaling issue or a leak in the intake tract. Even the closed loop portion of your log has a very large correction being applied. Almost 24% before the transition. You go from -8% to +25% total fuel in the span of 2000RPM.

If you're using the same valve timing with the factory TGV Open side I don't see AVCS causing these issues. TGV would be normally open in that region. So unless you're changing valve action it shouldn't be an issue. If you have reset to the Cobb OTS for that parameter and see if it changes.

Last edited by ericdet; 02-08-2018 at 07:08 AM.
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Old 02-08-2018, 09:40 AM   #1733
tegxsi
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Quote:
Originally Posted by Scoobman20 View Post
Hey everyone. I'm struggling to figure out where this lean spike is coming from when I reach boost. I replaced the header gaskets and j-pipe gasket thinking it could be an exhaust leak above the O2 sensor, but no improvement. I also looked over the intake and intercooler couplings. Could this be blow-by from AVCS or some other leak? My other concern is my calculated load seems higher than quite a few logs I'm seeing with similar mods.

Here is the OTS Stage2 Big SF - https://datazap.me/u/scoobman20/stag...og=0&data=8-26

Here is the same map with an OL MAF re-cal and the CL delay reduced and CL map high load changed slightly (better but the spike is still there in the beginning) - https://datazap.me/u/scoobman20/stag....91&tmax=99.60
This is pretty much what you get with OTS maps and from what I've read the COBB BIG SF intake is a pain.

The calculated load on some logs you see on here have the MAF along with a few other things scaled to avoid hitting the 3.30 load limit on the ECU. You will usually see it on Phatbotti/Ron Watson tunes.

When I tune for WOT open loop I zero the delay counter. I don't want any of that Evo like lean spool shenanigans lol.
If I were to tune for WOT full time closed loop then it would be the opposite along with a bunch of changes with the CL fueling and other delays.
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Old 02-08-2018, 10:11 AM   #1734
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Originally Posted by tegxsi View Post
This is pretty much what you get with OTS maps and from what I've read the COBB BIG SF intake is a pain.

The calculated load on some logs you see on here have the MAF along with a few other things scaled to avoid hitting the 3.30 load limit on the ECU. You will usually see it on Phatbotti/Ron Watson tunes.

When I tune for WOT open loop I zero the delay counter. I don't want any of that Evo like lean spool shenanigans lol.
If I were to tune for WOT full time closed loop then it would be the opposite along with a bunch of changes with the CL fueling and other delays.
Thanks for the helpful replies. That's interesting with the phatbotyi and Ron tunes. I'll try a few more WOT MAF Cal's and see where that gets me but I'm sure I'll hit that load limit. So if I scale the MAF lower then would I have to crank up the VE?
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Old 02-08-2018, 10:53 AM   #1735
tegxsi
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Originally Posted by Scoobman20 View Post
Thanks for the helpful replies. That's interesting with the phatbotyi and Ron tunes. I'll try a few more WOT MAF Cal's and see where that gets me but I'm sure I'll hit that load limit. So if I scale the MAF lower then would I have to crank up the VE?
On basic bolt-on's I think most will stay under the limit.
Look for "Boost/Load Hard-coded limits" in Cobb's DIT Accesstuner tuning guide. It's not as easy as it seems since all load related tables need manipulating. You really need to know what you are doing...especially with ignition timing.
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Old 02-08-2018, 11:43 AM   #1736
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Originally Posted by tegxsi View Post
On basic bolt-on's I think most will stay under the limit.
Look for "Boost/Load Hard-coded limits" in Cobb's DIT Accesstuner tuning guide. It's not as easy as it seems since all load related tables need manipulating. You really need to know what you are doing...especially with ignition timing.
These are all percentage changes based on load. It's not that time consuming considering your just changing everything by what you removed. Lower Maf calibration x%, increase Fuel Trim x%, scale cranking x%, lower load x%.
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Old 02-08-2018, 12:14 PM   #1737
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These are all percentage changes based on load. It's not that time consuming considering your just changing everything by what you removed. Lower Maf calibration x%, increase Fuel Trim x%, scale cranking x%, lower load x%.
That's the easy part. The thing is that every table that references load (Z-AXIS, i.e., ignition, AVCS, Fuel) becomes shifted depending on % change.

Last edited by tegxsi; 02-08-2018 at 12:26 PM.
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Old 02-08-2018, 12:17 PM   #1738
ericdet
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Default FA20 COBB Logs - Post Yours Here!

Quote:
Originally Posted by tegxsi View Post
That's the easy part. The thing is that every table that references load (ignition, AVCS, Fuel) becomes shifted depending on % change.


Yes but youíre only changing the headers by the default % again. Itís still not difficult and doesnít require anything but time.
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Old 02-10-2018, 12:10 AM   #1739
YungBoba
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Old 02-10-2018, 02:59 PM   #1740
gn4rwhals
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Mods? Fuel? Mans needs to post more info.
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Old 02-10-2018, 03:39 PM   #1741
YungBoba
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Originally Posted by gn4rwhals View Post
Mods? Fuel? Mans needs to post more info.
It's in the Datazap link but I got too lazy to post here, whoops

TGV deletes
EGR deletes
Grimmspeed EBCS
Grimmspeed TMIC
Grimmspeed charge pipe
Cobb catback

Protuned by Ron Watson on ACN 91 hippy gas
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Old 02-12-2018, 06:36 AM   #1742
cdog82
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Car: 2016 WRX
Power Mods:
-Invidia catted j pipe
-Invidia q300 catback
-Killer B Headers
-Grimmspeed Stealthbox intake
-Grimmspeed TMIC
-Grimmspeed Charge Pipe
-Grimmspeed 3 Port EBCS
-IAG EGR Delete
-AG Billet TGV Delete
-IAG Street Series AOS
-COBB Flex Fuel Kit
-DeatschWerks DW300C Fuel Pump
Tranny: 6MT
Fuel: Flex Fuel @ E57
Tune: Brentuning Flex fuel Etune
Gear: 3rd

https://datazap.me/u/cdog82/log-1518...log=0&data=5-8
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Old 02-12-2018, 09:43 AM   #1743
ericdet
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Originally Posted by cdog82 View Post
Car: 2016 WRX
Power Mods:
-Invidia catted j pipe
-Invidia q300 catback
-Killer B Headers
-Grimmspeed Stealthbox intake
-Grimmspeed TMIC
-Grimmspeed Charge Pipe
-Grimmspeed 3 Port EBCS
-IAG EGR Delete
-AG Billet TGV Delete
-IAG Street Series AOS
-COBB Flex Fuel Kit
-DeatschWerks DW300C Fuel Pump
Tranny: 6MT
Fuel: Flex Fuel @ E57
Tune: Brentuning Flex fuel Etune
Gear: 3rd

https://datazap.me/u/cdog82/log-1518...log=0&data=5-8
Reset to Cobb default parameters. Not enough here.
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Old 02-13-2018, 12:57 AM   #1744
cdog82
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oops sorry, here you go.

Car: 2016 WRX
Power Mods:
-Invidia catted j pipe
-Invidia q300 catback
-Killer B Headers
-Grimmspeed Stealthbox intake
-Grimmspeed TMIC
-Grimmspeed Charge Pipe
-Grimmspeed 3 Port EBCS
-IAG EGR Delete
-AG Billet TGV Delete
-IAG Street Series AOS
-COBB Flex Fuel Kit
-DeatschWerks DW300C Fuel Pump
Tranny: 6MT
Fuel: Flex Fuel @ E57
Tune: Brentuning Flex fuel Etune
Gear: 3rd

https://datazap.me/u/cdog82/log-1518...?log=0&data=33
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Old 02-13-2018, 12:39 PM   #1745
That_Boosted_Life
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Quote:
Originally Posted by cdog82 View Post
oops sorry, here you go.

Car: 2016 WRX
Power Mods:
-Invidia catted j pipe
-Invidia q300 catback
-Killer B Headers
-Grimmspeed Stealthbox intake
-Grimmspeed TMIC
-Grimmspeed Charge Pipe
-Grimmspeed 3 Port EBCS
-IAG EGR Delete
-AG Billet TGV Delete
-IAG Street Series AOS
-COBB Flex Fuel Kit
-DeatschWerks DW300C Fuel Pump
Tranny: 6MT
Fuel: Flex Fuel @ E57
Tune: Brentuning Flex fuel Etune
Gear: 3rd

https://datazap.me/u/cdog82/log-1518...?log=0&data=33
Looks good. Is that the final revision? Just wondering why boost isn't so high in the 5k+ range as other logs
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Old 02-13-2018, 06:01 PM   #1746
cdog82
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Originally Posted by That_Boosted_Life View Post
Looks good. Is that the final revision? Just wondering why boost isn't so high in the 5k+ range as other logs
Yes it's the final revision. I'll check with Bren but I got the impression that with my mods and the flex fuel etune they lean a tiny bit more towards the conservative side in order to preserve stock internals. Could be why they let boost drop a bit more than expected?
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Old 02-13-2018, 06:36 PM   #1747
gn4rwhals
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That tune is knocking, check right before 5k and 6k, FKL during WOT is not desired as the engine will pull timing out.

A little lean but it is ethanol and boost falls off hard and fluctuates at the tail end a bit, perhaps an upgraded BPV is in order?

https://datazap.me/u/cdog82/log-1518...19-20-24-33-36
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Old 02-14-2018, 12:58 AM   #1748
Orochi
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Did a random log on the drive home tonight to see how the car is doing. Noticed a bit of overboost. Is this something to worry about?

https://datazap.me/u/orochi/2015-wrx...a=3-8-11-26-30
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Old 02-14-2018, 01:51 PM   #1749
sth36
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Catless exhaust? Could be a little bit of boost creep there at the end, but it doesn't appear to be THAT cold out.
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Old 02-14-2018, 01:53 PM   #1750
GlarryHoodDIT
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Phatron Tuned

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That log shows no overboosting and no boost creep. .5PSI over target is well within acceptable parameters- especially if it's that incredibly brief.

In the future you don't need to wind it out to 6700- the car is dead on power about 700rpm before that.
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