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01-06-2013, 04:12 AM | #101 | |
Scooby Newbie
Member#: 292364
Join Date: Aug 2011
Chapter/Region:
MWSOC
Location: Neeebraska
Vehicle:2011 WRX ISM |
Quote:
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01-06-2013, 11:28 AM | #102 |
Former Vendor
Member#: 190729
Join Date: Oct 2008
Chapter/Region:
NWIC
Location: Marysville, WA
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Looks like you had too much knock on that cylinder. The top ring land looks like it's seen quite a bit.
You said you tuned it yourself, right ? How much knock were you getting ? I've had guys think knock was ok because they had forged pistons. Knock is never ok. |
01-09-2013, 09:11 PM | #103 | |
Scooby Newbie
Member#: 292364
Join Date: Aug 2011
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MWSOC
Location: Neeebraska
Vehicle:2011 WRX ISM |
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01-10-2013, 01:07 PM | #104 |
Former Vendor
Member#: 190729
Join Date: Oct 2008
Chapter/Region:
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Location: Marysville, WA
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.3 volts? What are you using for EMS?
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01-10-2013, 01:33 PM | #105 |
Scooby Newbie
Member#: 292364
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Chapter/Region:
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Location: Neeebraska
Vehicle:2011 WRX ISM |
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01-10-2013, 02:13 PM | #106 |
Former Vendor
Member#: 190729
Join Date: Oct 2008
Chapter/Region:
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Location: Marysville, WA
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I can barely see it in the picture. It looked like a lot of small pits below the upper ring. Plus the wear on the wrist pin made me think detonation.
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01-10-2013, 05:17 PM | #107 |
Scooby Specialist
Member#: 316296
Join Date: Apr 2012
Location: Metro Detroit
Vehicle:2006 STIROID 10.5@131 on 29psi |
Were these upgraded wrist pins??
I'm not going to bash said shop but I do know for a fact they are a little timing happy on their tunes and based on the dyno sheets I have from the previous owner they aren't exactly the most well-versed in Subaru tuning. |
01-10-2013, 06:33 PM | #108 |
Former Vendor
Member#: 190729
Join Date: Oct 2008
Chapter/Region:
NWIC
Location: Marysville, WA
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Is it safe to say that nobody verified the pin to piston clearance?
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01-10-2013, 06:40 PM | #109 |
Scooby Newbie
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Join Date: Aug 2011
Chapter/Region:
MWSOC
Location: Neeebraska
Vehicle:2011 WRX ISM |
They were not upgraded pins, I don't remember where timing was at. It made 450/449 on AMS's dyno. The tune really wasn't that great, drivability kind of sucked
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01-10-2013, 06:42 PM | #110 |
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Vehicle:2004 WRX STi HTA86 |
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01-10-2013, 06:53 PM | #111 |
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Location: Chattanooga, TN
Vehicle:2007 WRX STi PTE6266 OBP |
If his issues were anything like mine...the car would cruise so lean it would hesitate if you stepped on the gas faster than a grandma on a Sunday drive. Throttle so touchy it looks like you just started driving your first stick shift car. Throttle accel issues out the azz.
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01-10-2013, 06:56 PM | #112 | |
Scooby Specialist
Member#: 316296
Join Date: Apr 2012
Location: Metro Detroit
Vehicle:2006 STIROID 10.5@131 on 29psi |
Quote:
Look at the ignition accel and decel tables. Mine were spaced out. |
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01-10-2013, 07:19 PM | #113 |
Scooby Newbie
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What they said^
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01-16-2013, 06:47 PM | #114 |
Scooby Newbie
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Vehicle:2011 WRX ISM |
Would it be worthwhile to replace all the wrist pins with JE's upgraded pins? I'm wondering if the wrist pin bent slightly because of the extreme load
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01-16-2013, 06:51 PM | #115 |
Former Vendor
Member#: 190729
Join Date: Oct 2008
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Pm sent
Stronger pins are always worth it. |
01-16-2013, 08:09 PM | #116 | |
Scooby Specialist
Member#: 316296
Join Date: Apr 2012
Location: Metro Detroit
Vehicle:2006 STIROID 10.5@131 on 29psi |
Quote:
JE recommends the upgraded pins for over 500 hp. |
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01-16-2013, 08:23 PM | #117 |
Former Vendor
Member#: 190729
Join Date: Oct 2008
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Location: Marysville, WA
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I think I have them in stock...
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01-17-2013, 10:12 PM | #118 |
Scooby Guru
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Chapter/Region:
AKIC
Location: Oneonta, NY
Vehicle:2005 WRX STi WRB |
Do it... mine are and offset iirc.
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01-24-2013, 10:28 PM | #119 |
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SCIC
Location: orange california
Vehicle:2006 STi WRB |
I found out a tapping noise was one of my rod bearing being bad and the noise was only from 2.5k rpm-4k rpm. The rod and crank were f'ed up bad. So, a tear down would be adviseable if you have a spare car or borrow one.
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01-24-2013, 10:45 PM | #120 |
Scooby Newbie
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Problem was cyl 2 wrist pin. Rebuilding right now should be running in a couple weeks or less
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03-12-2013, 12:20 PM | #121 |
Scooby Newbie
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UPDATE: just fired the car up anddddd the tick is still there although it doesn't sound as bad. I'm grabbing some 20w50 right now to try out and see if it goes away. It's only there now when completely warmed up
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03-12-2013, 03:14 PM | #122 |
Scooby Newbie
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Location: Neeebraska
Vehicle:2011 WRX ISM |
Another update..switching from 10w40 to 20w50 made absolutely no difference in sound..car still runs perfect. Swapped avcs solenoids around to see if the noise followed..it didn't. Car still runs perfect. I am seriously lost as to what this could be.
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03-12-2013, 03:27 PM | #123 |
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Assuming you put new pistons and wrist pins in?
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03-12-2013, 04:04 PM | #124 |
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Location: j-ville fl
Vehicle:06 Wrx RWD Auto 76MM-AEM-2200's |
upppdates!! if you swapped to new pistons, and replaced the rod bushing...seems tou should run car wihtout timing belt cover and visually look at tensioner. sounds dumb but very easy to do and only takes a short amount of time.
maybe its an oil flow issue, also did the lash check out before you installed new motor? if lash is good and all bearings/wrist pins are clearanced right shouldnt be any more noise loud tap wise... maybe avcs issues...... |
03-12-2013, 04:28 PM | #125 |
Scooby Newbie
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Join Date: Aug 2011
Chapter/Region:
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Location: Neeebraska
Vehicle:2011 WRX ISM |
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