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Old 01-12-2009, 09:22 AM   #31 (permalink)
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Default better understanding

ok so reading that i understand how it works, my question is, on a stage two WGA, what pressure does that spring take safley? ( attempting to fine tune my tru boost WGA Spring setting )

AEM said to set it at five, but then i'm only boosting to like 7 max, but i dont want to go some insane number like 20 0r 25 and blow up something.
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Old 01-12-2009, 03:23 PM   #32 (permalink)
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Quote: Originally Posted by mahkis View Post
the word vacuum should be replaced with pressure. there is never vacuum in the compressor housing/bc/wg.

you beat me to it. i was about to call him a dumbass and go back and change his posts to reflect what it should say as opposed to what was said. obviously he is still a newb though.
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Old 01-12-2009, 03:32 PM   #33 (permalink)
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good info, i was trying to explain it to a buddy and just confused myself. ill have to show him the post. bump for more people to read.
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Old 01-12-2009, 06:10 PM   #34 (permalink)
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Default answer?

bump for an answer on my "?". thanks.
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Old 01-12-2009, 10:42 PM   #35 (permalink)
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Quote: Originally Posted by goblin42 View Post
ok so reading that i understand how it works, my question is, on a stage two WGA, what pressure does that spring take safley? ( attempting to fine tune my tru boost WGA Spring setting )

AEM said to set it at five, but then i'm only boosting to like 7 max, but i dont want to go some insane number like 20 0r 25 and blow up something.

why are you only boostin 7psi? you should be boosting at least 15 if you are stock.
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Old 01-12-2009, 11:47 PM   #36 (permalink)
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Default AEM said. .. blach

well i was going by AEM's manual, so it had me set the the spring pressure at 5 so it doesnt seem to want to go over 7psi. so i went ahead and put the spring pressure to like 18 and so i was able to peak it higher. only issue i'm geting now is that i'm having sort of a sputtering sound while boosting. any ideas??
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Old 01-13-2009, 12:48 AM   #37 (permalink)
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Quote: Originally Posted by goblin42 View Post
ok so reading that i understand how it works, my question is, on a stage two WGA, what pressure does that spring take safley? ( attempting to fine tune my tru boost WGA Spring setting )

AEM said to set it at five, but then i'm only boosting to like 7 max, but i dont want to go some insane number like 20 0r 25 and blow up something.

stage2 WGA is exactly the same WGA as the stock one, but with an adjustable spring
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Old 01-13-2009, 01:00 AM   #38 (permalink)
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Good reading.
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Old 01-13-2009, 04:49 PM   #39 (permalink)
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Default more WGA / Boost help

okay next question would be how do i adjust it, what is it safe to adjust to, and why am i getting a sputtering airsound that seems to be comming from around my turbo?
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Old 01-15-2009, 05:07 AM   #40 (permalink)
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That sound is part throttle boost(PTB) or should I say, part throttle OVERboost.

What is happening is pretty much a compressor surge...

You are holding too much boost for your engine to manage at part throttle so the compressed air has no way to go but back through the compressor... and thus ensue a thug-a-war game between air coming in and air going out.
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Old 01-16-2009, 01:03 AM   #41 (permalink)
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So all you gotta to is turn it down a bit right? Or the BOV? Both???
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Old 01-16-2009, 02:03 AM   #42 (permalink)
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Quote: Originally Posted by SRTGallardo View Post
So all you gotta to is turn it down a bit right? Or the BOV? Both???

ye, your spring is holding too much... so at part throttle it doesnt let the wastegate open and slow the turbine...


or what you can also do is modify the way you drive....

be gentle on the throttle when daily driving and dont WOT in gears above 1st and 2nd unless your at 3k rpm
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Old 01-16-2009, 11:27 AM   #43 (permalink)
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Yeah I did modify the way I drive. Had to. lol
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Old 01-16-2009, 11:40 AM   #44 (permalink)
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The minimum boost you can really run is the spring in the wastegate. If you have an adjustable wastegate and you have it too loose (you can usually tell if it is too loose because you can physically move the wastegate arm back and forth when it is installed) the flapper will just blow open with exhaust pressure and the turbo will never spool.

To answer another question, people upgrade their WGA's becuase the stock WGA's spring is too light, which will blow open from the exhaust pressure after a certain amount of boost. Ultimately the best combo is a boost controller and an aftermarket WGA, but most aftermarket WGA's are adjustable so you can preload the spring to make it open at a higher boost.
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Old 02-03-2009, 04:57 PM   #45 (permalink)
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AWESOME write up.!! Two thumbs up.
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