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Old 03-26-2013, 05:19 PM   #6076
iNfEk
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Quote:
Originally Posted by 25rsti View Post
But the factory jdm downpipe does have cats.
Don't you have an aftermarket exhaust? There is no CEL generated for this sensor
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Old 03-26-2013, 05:28 PM   #6077
25rsti
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I have a 1 piece Fujitsubo exhaust, but if I'm talking about removing the factory rear o2 sensor and putting a wideband sensor in it's place then I still have the cats pre and post the sensor on the jdm downpipe.
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Old 03-26-2013, 06:10 PM   #6078
lil'redwagon
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yeah, you don't want to run your wideband after a cat. shops do it when they tune cars with a cat, but i don't know how it skews the readings. i'm sure there's a fixed amount of change that the cat imparts on the readings, so if you can find that out, you could just make the mental change in your head when you're reading the AFR gauge.
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Old 03-26-2013, 06:16 PM   #6079
25rsti
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Hmm, so where is everyone on here with the stock jdm downpipe putting their widebands?
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Old 03-26-2013, 07:03 PM   #6080
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So running a standalone is better than the jdm as far as communication, and it's more reliable if you're looking to have a slightly built DD. I'm talking about the AEM EMS-4 or Haltech unit.

Last edited by JDM_Thompson914; 03-26-2013 at 07:09 PM.
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Old 03-26-2013, 08:08 PM   #6081
WhiteBgeye02
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okay im going to end this. my friend has a bugeye with a ej25 engine and we made 570whp on it w/o avcs on a bugeye 02 wrx ecu. u dont need standalones any more. its just a waste of money. The carberry SD rom I am running on his ecu for the tune is the ****. its free and does all the same ****!

on a second note lets keep this to JUST ej207 stuff. any drivetrain questions can be made in the drivetrain section of the forums. its not wonder ppl ask the same questions weekly. its cluttered with other bull****!

third note. anyone here that does there own tuning or has a reputable shop tune with valuable info want to start another thread for just tuning and not the same questions week after week? I have small things i like to talk about when it comes to e85 and stuff on these engines and timing but it just gets lost and forgot with everything dumb being posted.

not the fella that is doing the full v8 swap. if u didnt buy the IA perf harness yet hit me up and ill save u 60 bucks.
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Old 03-26-2013, 08:14 PM   #6082
25rsti
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Ok so back on topic.

Quote:
Originally Posted by 25rsti View Post
Where is everyone on here with the stock jdm downpipe putting their widebands?
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Old 03-26-2013, 08:59 PM   #6083
jhenry1983
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Wideband in rear 02 is where I put it
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Old 03-27-2013, 07:12 AM   #6084
eqlized_aero
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I wasn't sure if anyone had a picture of a GM open element AIT mounted in approximately the same location as the stock manifold sensor. It's a trick to get it in there, but with proper machining it will fit. I ended up using an end mill that was 9/16" because your new center point for drilling is in the previous hole. Tap with 3/8" NPT and you're good to go.

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Old 03-27-2013, 05:49 PM   #6085
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I was running the stock boost solenoid on my old V9 and I'm going for a 3 port this time around for my new JDM swap. What are you guys using for 3 ports? Does it matter? Cobb, Grimmspeed. I read from Vlad saying in the past that the Prodrive wasn't so great.
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Old 03-27-2013, 08:57 PM   #6086
96SubyImpreza
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Quote:
Originally Posted by 25rsti View Post
I was running the stock boost solenoid on my old V9 and I'm going for a 3 port this time around for my new JDM swap. What are you guys using for 3 ports? Does it matter? Cobb, Grimmspeed. I read from Vlad saying in the past that the Prodrive wasn't so great.
I just picked up a grimmspeed as per recommendation of EFI, I'll let you know what I think of it.
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Old 03-27-2013, 09:09 PM   #6087
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Quote:
Originally Posted by 96SubyImpreza View Post
I just picked up a grimmspeed as per recommendation of EFI, I'll let you know what I think of it.
Grimmspeed here also. Managing to see full boost right at 3000RPMs on a hybrid setup with that and an MBC
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Old 03-28-2013, 12:07 AM   #6088
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Hey guys, So im having a little bit of an issue with a cam postion sensor on my usdm257/jdm ecu ran engine. Im throwing a cam position sensor code and have come to the conclusion that the drivers side usdm avcs cam gear does not have the notches on the back to trigger the cam sensor.

So what i was wondering if any of you 207 owners have a jdm 207 drivers side avcs cam gear off and willing to snap a picture of the back side of it for me?

Any help would be much appreciated.
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Old 03-28-2013, 12:14 AM   #6089
murrdogg24
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Quote:
Originally Posted by 25rsti View Post
Ok so back on topic.
wideband in the rear of the downpipe where everyone should be putting them
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Old 03-28-2013, 09:51 AM   #6090
Vlad
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I have the wideband after the metal substrate converter in the downpipe.
I had it 6" down from the bellmouth and went through 2 O2 sensors in 1.5 years.
I have logged and plotted the graphs of the OEM and the wideband. The OEM is semi-wideband.
So in the cells where the OEM is active and loggable, if you watch the graphs in real time, they look identical, but the one where the wideband is time delayed:
-Wideband O2 6" post bellmouth vs OEM O2 pre-turbo (V7 or USDM), wideband is time-delayed to where it reads correctly a half cell later.
The cell is the X axis of the graph, reading in time.
-Wideband O2 1' post bellmouth, after Metal substrate converter, vs JDM OEM O2, 2" post bellmouth, is time delayed 1 cell, reading in time, same shape graph.

With this knowledge, you can have a wideband that will last vitually lifetime and still use it.
You can confirm your time delay by plotting the graph in the same window with the OEM O2 sensor and look at the time delay.

Oh and I tried the copper shield, but you have to have one preffessionally made, my hammered Home depot, piece of copper would prevent the wideband O2 from being properly seated.

Then I went and bought the very expensive Innovate heat sink.
That has an exhaust gas inlet that needs to be indexed with the direction of the exhaust gas flow.
You need to know this when you're welding the bung for it and they don't tell you this.
In Europe, many times you see threading with multiple "starts". Here, in automotive applications there is mostly one thread start.
If the indexing is wrong, you have to cut the bung and re-weld it in the correct indexed position.
Some suggested using a thicker copper washer for this. By the time I thought of this, the Innovate washer was kinda crushed and non removable...

Anyway, the point of this saga is.. just position the wideband sufficiently far back and assess the time delay, it's the cheapest, most painless alternative.
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Old 03-28-2013, 01:20 PM   #6091
JDM_Thompson914
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What does the ground wire on the intake manifold (left front corner between coolant overflow and inlet)?
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Old 03-28-2013, 03:23 PM   #6092
25rsti
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What does? How about a pic?

Fill out your profile.

What are you driving what did you swap in?
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Old 03-28-2013, 03:24 PM   #6093
cheese tits
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What is the leakdown spec for V8s? I got 3-4% on cyl 1-3 and 6% on cyl 4. Ive heard 0%, Ive heard 7%.
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Old 03-28-2013, 03:30 PM   #6094
25rsti
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I've read from Clark 0%. But who knows. He wrote that the V8s and V9s are so air tight.
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Old 03-28-2013, 05:26 PM   #6095
JulianDelphiki
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I was under the impression that <7% is acceptable.
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Old 03-28-2013, 05:28 PM   #6096
25rsti
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It might be, I'm just restating what I've read in this thread posted by Clark.
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Old 03-28-2013, 06:01 PM   #6097
JulianDelphiki
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Quote:
Originally Posted by 25rsti View Post
It might be, I'm just restating what I've read in this thread posted by Clark.
I remember him saying that earlier also, however he has been incorrect before......
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Old 03-28-2013, 06:03 PM   #6098
25rsti
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haha That's exactly why I made it a point to state I saw Clark posted it. I honestly do not know what the safe limits are other than the lower the better.
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Old 03-28-2013, 06:18 PM   #6099
stlnation
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http://db.tt/CWa2J5xJ



Maaybe I did it wrong.


I think this is what you want to know
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Old 03-28-2013, 06:25 PM   #6100
JulianDelphiki
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Quote:
Originally Posted by stlnation View Post
http://db.tt/CWa2J5xJ

Maaybe I did it wrong.

I think this is what you want to know
Thanks for the post. I have that same manual and that page is for a compression test not leak down.
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