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01-17-2018, 02:33 PM | #76 |
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Member#: 110078
Join Date: Mar 2006
Location: Long Island N.Y.
Vehicle:02 Bugeye JDM STi OBP BLACK |
I see, I guess when you have a graph like shown above the better oiling and breathing makes sense. I see a terribly laggy setup, I’d be miserable on my street car with that. I like my td04 for dd, don’t need a top end setup for that. I also have a 2.0L STi motor with an 18g and supporting mods. The STi with the 18G kicks hard at 3900 rpm and continues pulling hard to redline. I wish the spooling started at 3400rpm and kept pulling as it does to redline. I paid $1400 for a low mile jdm ej205 that was basically a drop in motor. I wired avcs and run it on a jdm ecu. I can swap ecu back and fort between usdm and jdm, simple. How cheap do you buy your type motors for ?
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01-17-2018, 03:28 PM | #77 |
Scooby Newbie
Member#: 457177
Join Date: Oct 2016
Chapter/Region:
Tri-State
Location: New Jersey
Vehicle:03 EJ20X GDA FP-blue |
It is quite laggy indeed. I was told that if I get dual AVCS to function, it would move my curves to the left. I'm not sure where it would end up but supposedly it is much better. The computers that run dual AVCS are 32 bit though, and mine is 16. So, I could do a simple setup like yours but would be limited to intake avcs only.
Once it spools though, it's a rocket. These things can be had for 700+ or 1400 with the tranny. There was a considerable amount of work to get my build going.. but.. I'm happy with it. There are people on other forums who praise it.. I also heard from my shop this is one of the best flowing heads you can get. Basically I just had to adjust my driving habits to be "on the pipe" |
01-17-2018, 03:40 PM | #78 |
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Member#: 297396
Join Date: Oct 2011
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I would at least suggest to park the cams at the non-avcs settings using some sprockets.
It would move the curve left and more like a normal EJ205. Would probably help the spool of the turbo as well. It is semi-involved. You would need at least intake sprockets, plugs for the cams (all four), cam seals and may be able to cheat by skipping teeth on the dAVCS sprockets. It's pretty well covered in proven power bragging. I even included virtual dyno screenshots to show where the curve would move to. Ultimately, your call. |
01-17-2018, 05:19 PM | #79 |
Scooby Specialist
Member#: 110078
Join Date: Mar 2006
Location: Long Island N.Y.
Vehicle:02 Bugeye JDM STi OBP BLACK |
EJ20X EJ20Y Power potential
Just make sure you install plugs that are not permanent if you ever want to get avcs functional. I bet you could spool 1,000 rpm sooner with the suggested setup.
Last edited by D-Rodman; 01-17-2018 at 07:57 PM. |
01-18-2018, 10:37 PM | #80 |
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Member#: 457177
Join Date: Oct 2016
Chapter/Region:
Tri-State
Location: New Jersey
Vehicle:03 EJ20X GDA FP-blue |
Yes I had everything apart and considered it.. but.. realized my efforts were better off being spent on actually getting davcs functional.. so.. We;ll see
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08-02-2018, 07:34 PM | #81 |
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Member#: 331683
Join Date: Sep 2012
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What about sensors and solenoids for the engine? Is there any other usdm cars that will interchange the different sensors and solenoids?
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10-17-2018, 12:24 PM | #82 |
Scooby Guru
Member#: 33782
Join Date: Mar 2003
Chapter/Region:
MAIC
Location: Milton Keynes, UK
Vehicle:96 3MI Racing search FIRST, then PM!!! |
So has anyone verified the rumors about these have forged crown/cast pistons? I can't find anything other than forum comments and no pics, and the below web page.
http://australiancar.reviews/Subaru_...0Y_Engines.php |
10-31-2018, 09:49 PM | #83 |
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Member#: 493448
Join Date: Oct 2018
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Will these motors survive on 91?
I purchased a project and it has the following USDM ecu EJ20Y TGY deletes 3" downpipe and w resnator exhaust VF39 STI cams with legacy GT gears AVCS plugged USDM intake and just a wix standard filter 1 step colder plugs catch can. 255 pump and yellow side feeds The car has about 2000 miles on it before I purchased it. I took it to the tuner and it made decent power but it was detonating like crazy according to him. At least that is what the ECU and knock sensor was telling him. He first inquired as to what octane I was running and I got it from Superamerica and that's a certified top tier gas. I checked out the knock sensor and it was about 600ohms and I hit the manifold with a hammer and the resistance changed so I think its working. The voltage from the car into the sensor was 4.7 volts. I have a feeling its something simple but I'm replacing the knock sensor and heading back to the tuner next tuesday. The AFR was steady at 12.0 and the car wasn't losing power it was just detonating according to the knock sensor. Can't decide on the hard to get 93 or 91 gas tank tune though but I'm having trouble on where to start trying to figure out why it is knocking |
10-31-2018, 09:57 PM | #84 | |
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Join Date: Nov 2002
Chapter/Region:
SCIC
Location: Orange County CA
Vehicle:2004 WRX wagon silver |
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10-31-2018, 11:35 PM | #85 |
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thats what I'm trying to figure out, the tuner said they tune for these engines but this one is detonating for some reason and from what I have measured with the knock sensor it is good and the voltage to it is good, it didn't throw a CEL for knocking either or any other CEL's.
I got a new genuine subaru knock sensor coming on monday. I checked for boost leaks and didn't find any. |
10-31-2018, 11:37 PM | #86 | |
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Location: Orange County CA
Vehicle:2004 WRX wagon silver |
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11-01-2018, 12:01 AM | #87 | |
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Ignition and fuel showed fine according to the tuner. |
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11-01-2018, 12:07 AM | #88 |
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Location: Orange County CA
Vehicle:2004 WRX wagon silver |
why wouldnt be one of those 2 things? I dont quite understand so you were getting knock and your tuner is saying the fuel and ignition were okay? I think you need him to validate his statement. if you are getting detonation, somethings not right, so do you have a AFR gauge in the car? I would try the octane to rule it out. either that or get some torco and put half the can in the gas tank and see what happens
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11-01-2018, 07:27 AM | #89 | |
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Quote:
tuner was questioning if it was bad gas, lower octane, or a bad knock sensor. I inspected the knock sensor and although it measured out ok i ordered a new knock sensor. I will switch to 93 next tuesday for the tune but if it's not the gas where do I start to look? Last edited by stgdz; 11-01-2018 at 08:56 AM. |
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11-01-2018, 10:30 AM | #90 | |
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Member#: 395793
Join Date: Jul 2014
Chapter/Region:
Tri-State
Location: SLC and Lake Placid
Vehicle:2005 92x Aero Beige |
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There's more to a tune then just simply setting the AFR and getting on the throttle. What else was going on with the tune? Having 9.5:1 CR changes how you use AFR, boost and hole bunch of other variables as well. You say it was't pulling "power". Do you mean it wasn't pulling timing? You state USDM ecu and avcs plugged. Do you mean the avcs holes in the cams were plugged? Why did the tuner choose 12.0 AFR? Could also be the gas. If they just filled the tanks the day you filled up then you may have sh** in there causing issues. |
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11-01-2018, 11:52 AM | #91 | |
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Join Date: Nov 2002
Chapter/Region:
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Location: Orange County CA
Vehicle:2004 WRX wagon silver |
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11-01-2018, 02:19 PM | #92 |
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Member#: 33782
Join Date: Mar 2003
Chapter/Region:
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Location: Milton Keynes, UK
Vehicle:96 3MI Racing search FIRST, then PM!!! |
Personally, if I had one of these and 91 octane, I'd add a good water/meth system and a slightly larger turbo or turbine housing.
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11-01-2018, 08:15 PM | #93 | ||
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Join Date: Oct 2018
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So this was the e-mail I sent to the tuner
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My accessport crapped the bed just now, so I will need to the get the v3 upgrade from cobb. I have an obd2 scanner and the torque app. The AFR readout is a digital AEM display and I don't think I can tap into it. I have been watching the timing graph on torque though during pulls. What should I do? |
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11-01-2018, 08:49 PM | #94 |
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Join Date: Nov 2002
Chapter/Region:
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Location: Orange County CA
Vehicle:2004 WRX wagon silver |
If you acess post crapped out before you had a chance to uninstall youre SOL. Youre going to have to get a new ecu. Sorry
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11-02-2018, 08:02 AM | #95 |
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11-02-2018, 11:13 AM | #96 | |
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Member#: 395793
Join Date: Jul 2014
Chapter/Region:
Tri-State
Location: SLC and Lake Placid
Vehicle:2005 92x Aero Beige |
Quote:
Contact Cobb about this but I've read that they can help when the screen dies. You may need to send the ecu in with the AP so they can uninstall it since it's just the screen that died. Pretty common on the V2 APs. The higher the CR the more likely your are to det. I'd tend to lean toward your tuners thought that you need to check the signal output of the old sensor vs new. This is the only way to know if it is reading correctly. Aside from that 12.0 AFR WOT does seem a bit lean for the higher CR. What psi was the turbo set to? I'm running 9.0:1 CR VF34 @19.2 psi on 91 and my tuner set AFR to 11.0 WOT. I have done a lot to battle heat soak. What have you done for heat retention? Are you still running the stock LGT TMIC? Have you coated/wrapped any exhaust parts? Turbo blanket/heat shield? If your IAT is high that could be contributing as well. I'm wondering if it's a combination of things right now, CR + X psi + 91 + higher IAT. |
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11-02-2018, 12:46 PM | #97 |
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Join Date: Oct 2018
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I've got a gs heat shield with an sti top mount. Air intakes are roughly 70 degrees or about 20 above ambient.
The inside of the heat shield is gold taped a d the outside of the time is gold taped. I didn't put it over the fins. I can't believe how cool both the time and the intercooler are. |
11-03-2018, 06:09 PM | #98 |
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Join Date: Oct 2018
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well the geniune subaru knock sensor is incompatible. My knock sensor has a brown connector and the one I hot has a grey, bot of them are a single wire though and the new one measure 600 on the bench so according to the bench readings they are the same. Realworld is up in the air.
damnit |
11-04-2018, 12:11 AM | #99 | |
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11-05-2018, 09:02 AM | #100 |
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