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Old 11-08-2010, 08:41 PM   #701
CKxx
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Old 11-08-2010, 08:59 PM   #702
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damn that sucks. yea wendy and the babysitter heard it, wendy was like what was that, babysitter was like a car.. wendy was like uh.... duh. what kind/color? she told me she heard somebody drive by i told her it was u. then she explained it to the babysitter.
whats with all the tires btw?
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Old 11-08-2010, 09:26 PM   #703
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whats with all the tires btw?

lol they for sale.. my dad brings them here from his job, still decent thread so i make a few bucks.
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Old 11-09-2010, 08:21 AM   #704
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we all get the rev.. lol
Yah but when you have no horn what choice do you have to get someones attention? LOL
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Old 11-09-2010, 10:28 AM   #705
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Ron brought something to my attention..the valve that required a 4.48 bucket while most of the other valves were in the 4.90 range. I did quadruple check the clearances, but that one bucket was odd. I can pull the valve cover and recheck the valve lash. Big up to ron for spending the thought and helping me try and get this build sorted. I really appreciate nasiocs help!

Big up nasioc massive. I'll up date wed.
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Old 11-09-2010, 10:39 AM   #706
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thanks for waking me up at 5am

But just like someone posted earlier its probably an exhaust valve......its pretty much the only thing thats gonna increase your compression and cause the richness to make the plug look like that.

besides that i think the only other thing would be ring(s) being upside down......

exactly how high were you when you were assembling the motor?
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Old 11-09-2010, 10:45 AM   #707
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Haha nice one ron...
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Old 11-09-2010, 05:00 PM   #708
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I didnt mean to wake you up,syke yeah I did...

I am perminitely high.
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Old 11-09-2010, 06:52 PM   #709
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exactly how high were you when you were assembling the motor?
he wasn't high when he put that bucket in and checked the clearance maybe thats the issue?
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Old 11-09-2010, 07:19 PM   #710
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thanks ralph, i would have been but...anyway, ralph was there when we lashed the valves and for whatever reason it did call for a small bucket. i just have to think its related...

the valves springs and retainers were all new. i made sure that the springs were seated and to be honest a retainer wont lock if it is not set properly, so i dont think it is the valve install.

the bucket size is determined by the length of the valve correct? so it just so happens that one of my valves was a couple hundredths longer than the others, right?

something else i considered. the 2.0 v5 big port heads were 49cc's stock. the machine shop opened them up to 54cc's.this was done by hand. if cylider 3 is say 53cc's would that cause higher compression in that cylinder? would that cause a 12% difference from the other cylinders?
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Old 11-09-2010, 07:34 PM   #711
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They should have cc'd the chambers to ensure all are the same volume
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Old 11-09-2010, 07:39 PM   #712
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well of course they told me they did measure them to be perfect and 54cc's, but i have not been impressed by this place recently.
plus unlike ed@equalibrium these were done by hand, not on a machine. i also paid a ton more than what ed is charging but he's on the west coast and i didn't want to risk putting another 3000 shipping miles on my precious heads.
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Old 11-09-2010, 07:42 PM   #713
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how do you think they are professionally measured for cc's? big turkey baster sized eye dropper and water, then estimate level?
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Old 11-09-2010, 07:54 PM   #714
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Plexiglass plate with a hole or two in it and a burrette. You can be pretty accurate down to the half cc
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Old 11-09-2010, 08:04 PM   #715
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i wonder if half a cc could make up 12% difference? again i will be spending some time taking her apart tomorrow, but i would like to take some speculation with me.

big up your chest, kelly, for chiming in. i appreciate it.
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Old 11-11-2010, 12:14 AM   #716
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so the warm compression test showed the 170 cylinder come down to 167. the other cylinders were 150's.

we discovered a leak at the manifold to uppipe gasket, replaced that. we also smoked the top mount. we found air leaks. the sti top mount is not welded. its held together by tabs that are pressed on. these were not very tight. i hammered them tight and it stopped the leak. plugged the pcv valve. ran one line from the valve cover to the tee to the crank case to the valve cover to a tee to a bottle, with holes drilled in the top. this simply vents the pcv system.

the car is running much better.

maf tab and some pulls sent for you ron!

Last edited by maxpowr; 11-11-2010 at 01:46 AM.
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Old 11-11-2010, 01:44 AM   #717
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compression test warm

1. 154 2. 155 3. 167 4. 150

ran an engine cleaner through the engine to try and clean the carbon out of cyl 3 but the other cylinders looked similar. valves were seated.

oil is still full. 500 miles into 2nd oil change.
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Old 11-11-2010, 02:06 AM   #718
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can we assume that cylinder 3 is less than the 54cc's. these heads were cut by hand. does it add up if cylinder 3 was actuall 53.5cc's the compression ration would be higher?
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Old 11-11-2010, 04:09 AM   #719
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plugged the pcv valve. ran one line from the valve cover to the tee to the crank case to the valve cover to a tee to a bottle, with holes drilled in the top. this simply vents the pcv system.
Not cool. Those vents need vacuum from the intake to work properly.
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Old 11-11-2010, 08:00 AM   #720
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i don't know if i agree. the crankcase and the valve covers need to vent. they don't need vaccuum. the oem subaru uses vaccuum from the turbo inlet to pull the gases and blowby from the pcv system for emissions reasons. subaru uses the catalitic converter to burn unused gas and blowby. i am drawing way more vaccuum then as oem. i am using a catch can to trap the oil instead of returning it to the intake for recycling.

i have an eye dropper full of oil in the catch can, but can feel the air surging into my bottle.

Last edited by maxpowr; 11-11-2010 at 08:06 AM.
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Old 11-11-2010, 08:08 AM   #721
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i don't think there is metered air lost from the crankcase and valve covers(heads). but i could be mistaken. either way the car is running much better.

please continue to consider my situation.
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Old 11-11-2010, 08:25 AM   #722
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Glad you're getting things sorted out man. Did the afr's stay more stable? How's the log look from a knock perspective?
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Old 11-11-2010, 08:29 AM   #723
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I've got my lines run like yours (crankcase and both cyl. head vents T'd together and run to one spot), except I ran mine to an oil catch can and back to the turbo inlet for some "vacuum" so it works like the stock crankcase vent system under boost (where the PCV valve would have locked shut) but it doesn't have much suction at idle. Because of this lack of suction at idle I some time get a little smoke out of the exhaust (it seemed worse when on E85 for some reason too).

The pressure from blowby at idle is the only thing I'd be concerned about, since it isn't sucking out the pressure from blowby it has the potential to blow out oil seals with the pressure (Although I've seen seals similar to the ones in our engines hold over 50 psi)
The best option I see to combat this is to use an electric vacuum pump to keep a constant vacuum on the crankcase. Some people have even reported horsepower gains from such systems.
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Old 11-11-2010, 01:13 PM   #724
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the pressure from the crank case and heads doesn't simply push through the opening and into the vented bottle? it requires vacuum to relieve the pressure?

its rigged up anyway. i am certailing looking into an aos that returns that slop to the filler neck.

this looks like the best value...but i'm up for anything that helps it work better.

http://www.importimageracing.com/p/S...7-WRX-STi.html
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Old 11-11-2010, 01:23 PM   #725
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I'm not gonna tell you not to get that particular AOS I will tell you from my work experience that an effective moisture seperator/AOS needs enough volume to generate good swirl inside. Usually bigger is better. I'm sure it is somewhat effective but I can't see it being as effective as a large canister style AOS.
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