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Old 12-11-2017, 03:15 PM   #1651
GlarryHoodDIT
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Quote:
Originally Posted by gn4rwhals View Post
I'm very aware of where the midpipe is, hence me telling him/her/yes to start the tuning process immediately.

Never said to run Stage 2 OTS either, I'm confused.
I was just saying there is no OTS for him, it was directed at you specifically.


The mid pipe is part of the cat back and does NOT require tuning. He didn't touch his mid pipe, so I wasn't sure why you brought that up. Hence me explaining the difference between the I pipe which does.need tuning and the mid pipe which does not.
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Old 12-11-2017, 03:46 PM   #1652
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Ah you know what I got confused and interchanged intermediate and midpipe, I've heard people refer to the exhaust a few ways.

J-pipe - Catback

J-Pipe - Midpipe - Catback

J-Pipe - Intermediate Pipe - Midpipe - Axelback < - This is the full list.

Anyway, that intermediate pipe most definitely needs a tune, or you can replace the J portion and run a MAP OTS Stage 2.
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Old 12-11-2017, 05:21 PM   #1653
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I can't prove it, but I'm pretty sure exhaust manufacturers are deliberately trying their hardest to cofuse and disorient us with their 100x combinations of piping.
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Old 12-11-2017, 05:36 PM   #1654
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Quote:
Originally Posted by gn4rwhals View Post
Ah you know what I got confused and interchanged intermediate and midpipe, I've heard people refer to the exhaust a few ways.

J-pipe - Catback

J-Pipe - Midpipe - Catback

J-Pipe - Intermediate Pipe - Midpipe - Axelback < - This is the full list.

Anyway, that intermediate pipe most definitely needs a tune, or you can replace the J portion and run a MAP OTS Stage 2.
Yes, I was originally sold on the PRL intermediate pipe (2nd half of a replacement J-pipe) for lower noise and less stink (easier install/removal was a plus). I'd swear that it was promoted as a piece that could run safely on a Cobb OTS Stage 1, but the feedback seems to indicate it is sufficiently different from an OTS stage 1 or even a stage 2 map, that it really needs a specific tune.
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Old 12-11-2017, 05:37 PM   #1655
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I know, I know. This is for posting logs. But kind of related, no? I’ve been trying to break through the 13 sec 1/4 mile. So I’m loud and proud right now.

Next goal—breaking through 12
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Old 12-11-2017, 05:51 PM   #1656
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Good run!
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Old 12-14-2017, 08:09 AM   #1657
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Old 12-19-2017, 09:25 PM   #1658
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Hey guys (in the know). I just pumped my first tank of ethanol in. (10 gal, the rest 93 oct). How can I use my Accessport to determine my concentration ? I turned on ethanol raw but it only reads 0.0
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Old 12-19-2017, 11:47 PM   #1659
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Originally Posted by jnorwooddds2004 View Post
Hey guys (in the know). I just pumped my first tank of ethanol in. (10 gal, the rest 93 oct). How can I use my Accessport to determine my concentration ? I turned on ethanol raw but it only reads 0.0


Never mind! I didn’t hook up my TGV Cable
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Old 12-20-2017, 01:42 AM   #1660
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Anybody have any logs with leaky headers or turbo gasket? Would like to see how the afr behaves from low to high boost. Thinking I have an exhaust leak and false lean.
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Old 12-20-2017, 02:22 AM   #1661
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Compare Commanded Fuel Final with your AFR. If you're hitting the AFR then you probably don't have a leak, if you're not hitting AFR investigate.
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Old 12-20-2017, 02:37 AM   #1662
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Compare Commanded Fuel Final with your AFR. If you're hitting the AFR then you probably don't have a leak, if you're not hitting AFR investigate.
I'm not but I have to wonder too whether it has to do with valve timing and blow through.
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Old 12-20-2017, 11:06 AM   #1663
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https://datazap.me/u/jnorwooddds2004...0&data=6-12-21

I was thinking I did 3rd gear WOT but I guess this is 2nd thru 4th WOT. Preparing to add ethanol
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Old 12-20-2017, 11:59 AM   #1664
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Originally Posted by jnorwooddds2004 View Post
Hey guys (in the know). I just pumped my first tank of ethanol in. (10 gal, the rest 93 oct). How can I use my Accessport to determine my concentration ? I turned on ethanol raw but it only reads 0.0


You should monitor Ethanol Final.
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Old 12-20-2017, 12:03 PM   #1665
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Originally Posted by ericdet View Post
You should monitor Ethanol Final.


I am now. Big point about that! If you look at my earlier post from last night. I didn’t realize it at the time but I hadn’t hooked up the flex fuel unit to the old TGV connector. So the flex fuel system was not getting any power. I realized it after I added ethanol and went to monitor it, which read 0.0. So any further logs will have it. Thanks for the input!
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Old 12-20-2017, 12:08 PM   #1666
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He's saying monitor Ethanol Final not Ethanol Raw like you mentioned. Ethanol Raw is constantly changing because your gas doesn't have 100% consistency- typically there is a 1-2% variance in Ethanol you'll notice within the same tank. Ethanol Final is what your car is compensating for, that's what is important.
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Old 12-20-2017, 12:11 PM   #1667
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Originally Posted by GlarryHoodDIT View Post
He's saying monitor Ethanol Final not Ethanol Raw like you mentioned. Ethanol Raw is constantly changing because your gas doesn't have 100% consistency- typically there is a 1-2% variance in Ethanol you'll notice within the same tank. Ethanol Final is what your car is compensating for, that's what is important.


Ah. I can do both for sure. I asked Mike Botti what he wanted me to monitor out of the two and he said he wanted raw monitored. I’ll bump something else out and add final too.
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Old 12-20-2017, 06:15 PM   #1668
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my DAM dropped on E40 i gave it half throttle coming out of a corner and heard a single "clack". the windows were down, maybe it was just gravel, don't say LSPI . immediately my DAM went down and i triggered the biggest FKL i've ever seen on my AP, -5.62. i turned logging on and cruised around while the FKL went down.

https://datazap.me/u/brian/big-knock...&data=11-15-22
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Old 12-20-2017, 06:19 PM   #1669
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Originally Posted by _brian_ View Post
my DAM dropped on E40 i gave it half throttle coming out of a corner and heard a single "clack". the windows were down, maybe it was just gravel, don't say LSPI . immediately my DAM went down and i triggered the biggest FKL i've ever seen on my AP, -5.62. i turned logging on and cruised around while the FKL went down.

https://datazap.me/u/brian/big-knock...&data=11-15-22


Oh...I will pray to the Subaru gods for you. I’m interested to see your log, must be pretty long cause my phone isn’t doing the trick.

Maybe one of these wizards on here will tell you they can see it’s nothing major
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Old 12-21-2017, 06:51 AM   #1670
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Quote:
Originally Posted by _brian_ View Post
my DAM dropped on E40 i gave it half throttle coming out of a corner and heard a single "clack". the windows were down, maybe it was just gravel, don't say LSPI . immediately my DAM went down and i triggered the biggest FKL i've ever seen on my AP, -5.62. i turned logging on and cruised around while the FKL went down.

https://datazap.me/u/brian/big-knock...&data=11-15-22
Given the RPM, Load, and audible knock. I'd say you're probably correct.

Just remember Ethanol while amazing at preventing knock is prone to pre-ignition much more than gasoline.
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Old 12-21-2017, 09:59 AM   #1671
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Quote:
Originally Posted by _brian_ View Post
my DAM dropped on E40 i gave it half throttle coming out of a corner and heard a single "clack". the windows were down, maybe it was just gravel, don't say LSPI . immediately my DAM went down and i triggered the biggest FKL i've ever seen on my AP, -5.62. i turned logging on and cruised around while the FKL went down.

https://datazap.me/u/brian/big-knock...&data=11-15-22
Quote:
Originally Posted by ericdet View Post
Given the RPM, Load, and audible knock. I'd say you're probably correct.

Just remember Ethanol while amazing at preventing knock is prone to pre-ignition much more than gasoline.

If the ECU read FKL and DAM dropped it wasn't LSPI. You have to remember that the ECU is not listening for knock during the time that LSPI occurs.

That was likely just a nasty old regular knock
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Old 12-21-2017, 10:07 AM   #1672
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Originally Posted by uofime View Post
If the ECU read FKL and DAM dropped it wasn't LSPI. You have to remember that the ECU is not listening for knock during the time that LSPI occurs.



That was likely just a nasty old regular knock


We get knock for loose exhaust pieces and A/C compressors. A giant loud resonance in the engine is going to get picked up in the same characteristic. Especially the description of the loud clacking sound.
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Old 12-21-2017, 10:08 AM   #1673
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Originally Posted by uofime View Post
If the ECU read FKL and DAM dropped it wasn't LSPI. You have to remember that the ECU is not listening for knock during the time that LSPI occurs.

That was likely just a nasty old regular knock
LSPI has knock events that follow the main preignition. The initial event can't be detected with this kind of system but following detonations can.
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Old 12-21-2017, 10:55 AM   #1674
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Hey all. Just got my new accessport and I loaded the cobb 91 octane ots tune to it. (normal wastegate selected)

Car has always run great with stock tune but was hoping to fix the 4k rpm lag from it.

This is my first ever datalog taken on the way to work this morning. Not really sure what I am looking at but it seems I am underboosting (stock tune doesnt ever do this to me)? Also, should I be concerned about the fine knock learn? Cobb documentation states up to -2.5 is "normal" but I would like to see that gone!!
perhaps its bad gas....I dont know.

conditions:
39 degrees, 4rth gear pull, car was warmed to normal temps, oil at 190 degrees.
car:
All stock aside from nameless axle back muffler deletes.

I am still learning the AP so I do not know how to monitor the fueling just yet as I read earlier on in the thread that I should be monitoring that, I think I need to go into the AP and tell it to monitor it? Still learning the interface.

https://datazap.me/u/vtwinjunkie/91o...-6-10-11-16-17

all suggestions welcome. Thanks

Car regularly sees 18-19 psi (indicated on the dash) tapering down a bit as rpm's increase to redline so when I saw this low boosting after the tune I was alarmed.
I think I may try the HWG tune and see if this helps.

Last edited by vtwinjunkie; 12-21-2017 at 03:15 PM.
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Old 12-21-2017, 02:24 PM   #1675
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Originally Posted by vtwinjunkie View Post
You are going slightly lean 5k-6k rpm, also without TD boost error or target boost its hard to tell if you are on or off target.

https://datazap.me/u/vtwinjunkie/91o...7&zoom=291-519

I would double check all intercooler hoses and make sure your intake piping has no leaks after the MAF.

You can see the FKL pulling timing out of the motor in the zoomed in part of your log, usually feedback knock (FBK) values of -1.41 to -2.81 will occur and are generally accepted due to AC compressor etc. but that learned knock and AFR tells me the primary O2 is seeing more air somewhere, or OTS MAF scale could just not work for your car.

An easy way to find out would be to get a smoke test done at a local shop, if that comes back good look into a protune.
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