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03-05-2013, 07:39 PM | #7101 |
Former Vendor
Member#: 190729
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Location: Marysville, WA
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03-05-2013, 07:50 PM | #7102 |
Scooby Specialist
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Join Date: Dec 2004
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MWSOC
Location: grove city ohio
Vehicle:04 sti 10.41@141 on e85@ 30psi--spinning |
wow just wow thats a schitload of timing and ding ding ding Dom called it right on the head from the getgo.
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03-05-2013, 07:54 PM | #7103 |
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Join Date: Feb 2001
Location: Dublin, CA
Vehicle:2002 WRX Sedan Midnight Black |
That looks an awful lot like a PSIa timing chart programmed into an ECU that's using PSIg.
At first, I looked at it and thought the axis was PSIa and thought it wasn't that bad... then I saw the negative numbers and that the axis was labeled PSIg... ouch. |
03-05-2013, 08:28 PM | #7104 |
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Join Date: May 2006
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SWIC
Location: Albuquerque, NM
Vehicle:2006 WRX Limited Wag 9.8@150 |
Another piece of the puzzle is that it bent 2 rods and they were both on the same side of the engine. Car had been running 3 step colder plugs but changed to 2 step colder to try to fix the breaking up.
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03-05-2013, 08:34 PM | #7105 |
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Location: j-ville fl
Vehicle:06 Wrx RWD Auto 76MM-AEM-2200's |
2/4? ^
and wow on the way cold plugs. sounds like there was just some bad tuning involved/ standalones dont tune themselves and are only as good as the tuner. |
03-05-2013, 08:35 PM | #7106 |
Former Vendor
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are you using crawford timing idlers to fix cam timing?
For e85, I rarely go more than one step colder. In some cases I'll go get a plug that doesn't have a protruding electrode. That helps pull the electrode out of the charge mixture. Since there is so much more fuel in the cylinder vs with pump gas, and fuel doesn't conduct electricity, there is a larger effective gap. Air doesn't conduct either, but the more non conductive material you place between two points of conduction the more resistance you'll get. |
03-05-2013, 08:43 PM | #7107 |
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sounds like there were alot of things stacked against this motor from the get go...
side note...Cam, sorry I didn't make it out for Isaac's tune. We got called into work thanks to some people I came here with not being able to behave themselves on Saturday nights Last edited by amalgrover; 03-05-2013 at 08:48 PM. |
03-05-2013, 08:43 PM | #7108 |
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Join Date: Dec 2004
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MWSOC
Location: grove city ohio
Vehicle:04 sti 10.41@141 on e85@ 30psi--spinning |
whats up with the idlers question Dom?
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03-05-2013, 08:47 PM | #7109 |
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Location: j-ville fl
Vehicle:06 Wrx RWD Auto 76MM-AEM-2200's |
what kinda plug gaps are you guys using on e85 at say 34-36 psi? i have heard stock coil packs and .022 gap and i should be good past 30 psi. havent tried yet though
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03-05-2013, 08:47 PM | #7110 |
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he bent rods on one side of the engine. What affects one side and not the other? Injectors are usually affected front to rear if someone goes parallel with their fuel setup (mistake many make).
The only real thing is either exhaust back pressure or cam timing. Since I'm pretty sure this had a full-race manifold on it, I don't think it's back pressure unless he's running only one wastegate. So cam timing is the obvious answer. What affects cam timing? AVCS maps, which could have been an issue since he was running an AEM and they have tons of issues with AVCS if your tuner isn't super familiar with tuning avcs on an AEM. HOWEVER, with his power levels I would assume that they didn't even use avcs because they used a big cam and this thing was laggy as fizznuck. So that leads me to the other common mistake people make and that is change the idlers to get the cam timing marks to line up perfectly. The problem with that is that it results in about 15-30 psi difference in static compression from one side to the other when you do that.... little known fact. Changing compression by doing that obviously affects AFR and MBT for that half of the engine, thus more cylinder pressure and bent rods. |
03-05-2013, 08:53 PM | #7111 | |
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Vehicle:2006 WRX Limited Wag 9.8@150 |
Quote:
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03-05-2013, 08:54 PM | #7112 |
Former Vendor
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03-05-2013, 08:58 PM | #7113 |
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Member#: 114730
Join Date: May 2006
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Location: Albuquerque, NM
Vehicle:2006 WRX Limited Wag 9.8@150 |
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03-05-2013, 09:00 PM | #7114 |
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hate ap rails. Do you know the version? They are known for uneven fueling and tons of misfires.
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03-05-2013, 09:02 PM | #7115 |
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Join Date: May 2006
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Vehicle:2006 WRX Limited Wag 9.8@150 |
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03-05-2013, 09:10 PM | #7116 |
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Vehicle:2006 WRX Limited Wag 9.8@150 |
And what rails are best?
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03-05-2013, 09:16 PM | #7117 |
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Vehicle:06 Wrx RWD Auto 76MM-AEM-2200's |
i personally would choose my aeromotives over the perrin/ap's.
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03-05-2013, 09:46 PM | #7118 |
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Vehicle:2006 WRX Limited Wag 9.8@150 |
Correction it's dual aeromotive pumps and a killer b header with single 44mm tial.
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03-05-2013, 09:50 PM | #7119 | |
Former Vendor
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Quote:
Vapor pockets are a big problem in some fuel rail designs and the number one reason I don't EVER do parallel rails on return style fuel systems. Fuel line pulse damping is an important part of a fuel system as well. Under certain pulse widths and rpms you can actually cause large pressure fluctuations and even internal fuel rail resistance to go up. This is something that OEM manufacturers compensate for and it's rarely thought of in aftermarket systems. Parallel systems are known for problems. Heck look at the 08+ STi. People are removing the parallel system and going to series to help get rid of the bad hesitation those cars get around 2800rpm. The newest AP rails ( I think V3) have a singe in and out on opposite sides of the rail and they appear to be -6AN instead of the old -4AN. I haven't run them, but I bet they are much better than the old design. If I had a set, I'd still run them in series. The new Perrin rails are not cross drilled between the goes-in and goes-outs either so I haven't had a lot of problems with them. The older V1's were. The Perrin side feed rails are miserable too because they enter at the center, then discharge out the side. One injector is operated like a dead head system and the other is normal. I've had multiple issues where heat soak has caused vapor lock in the 'dead headed' injector. Unseat the injector and you hear a hiss of vapor before fuel comes out. Re-seat it and it runs great for another 5 minutes or so until vapor builds up around the injector. |
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03-05-2013, 09:51 PM | #7120 |
Former Vendor
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03-05-2013, 09:55 PM | #7121 |
Scooby Specialist
Member#: 114730
Join Date: May 2006
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SWIC
Location: Albuquerque, NM
Vehicle:2006 WRX Limited Wag 9.8@150 |
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03-05-2013, 10:06 PM | #7122 |
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Location: Cedar, MI HP Techs MPS-SSLR2.5
Vehicle:2006 XTI Limited OBP, Junior tuned 573WHP |
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03-05-2013, 10:25 PM | #7123 |
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Vehicle:2006 WRX Limited Wag 9.8@150 |
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03-05-2013, 10:33 PM | #7124 |
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picture isn't too helpful. It does look good on the side of the bearing, but there's no load there. A better look at the part in red is what's needed to determine bearing condition.
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03-05-2013, 10:38 PM | #7125 |
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Vehicle:2006 WRX Limited Wag 9.8@150 |
I think this is the load side.
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