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Old 03-31-2007, 05:25 PM   #1
Arts
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Default what is the max boost on a vf39?

hey guys I have a 03 wrx with a vf39 and other supporting mods... I wanted to know... what is the max boost on a vf39??? ??
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Old 03-31-2007, 09:04 PM   #2
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You got that right!
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Old 03-31-2007, 11:16 PM   #3
Master2192
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The VF39 can get up to about 21-22 psi of boost but that is as far as it will go. This will depend on the pressure drop across your intercooler however.
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Old 03-31-2007, 11:30 PM   #4
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weld the wastegate shut and tell us; i'd say about 50 psi
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Old 04-01-2007, 12:36 AM   #5
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im running 21 on my vf34...i know they arent the same turbo though, and not sure if will help with info on the 39 but its worth a shot
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Old 04-01-2007, 09:48 AM   #6
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really it's gonna depend on your tune, but probably in the low 20's on most setups, higher if your running water/meth.
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Old 04-01-2007, 10:22 PM   #7
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i HEARD OF SOME BOOSTING UP TO 25 PSI ON C16 VP FUELS... U THINK IT COULD BE DONE?
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Old 04-02-2007, 12:14 AM   #8
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^clever use of the caps lock
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Old 04-02-2007, 12:28 AM   #9
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i'd say low 20's, above that and the turbo won't last long..
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Old 04-02-2007, 12:42 AM   #10
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Quote:
Originally Posted by Master2192 View Post
The VF39 can get up to about 21-22 psi of boost but that is as far as it will go. This will depend on the pressure drop across your intercooler however.

Thats about right
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Old 04-02-2007, 03:32 AM   #11
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My VF39 usually runs at about 1.7bar. I have gotten it to hit 2.0bar when ambient temps were around 25F. But for everyday street driving I set the boost to 25psi. This is on straight 93 octane.

Of course this is in the low to mid range. At high rpms it has trouble holding more than 19psi at 45F and about 18psi at 75F.
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Old 04-02-2007, 10:01 AM   #12
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Low 20's with a proper tune sounds about right.
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Old 04-03-2007, 12:19 AM   #13
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how many hp's can I make with this 21-22psi?
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Old 04-03-2007, 12:27 AM   #14
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As many hp's as you want. LOL......what does it say under your user name besides Scooby?
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Old 04-03-2007, 01:09 AM   #15
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Quote:
Originally Posted by Arts View Post
how many hp's can I make with this 21-22psi?
300/300 should be attainable on high octane or water/meth.

I'm using a VF39/FMIC on 92 pump and run 19psi through peak, tapering to 17psi at redline. I've pushed it as far as 24->18 on high octane (100+).

Quote:
Originally Posted by 2ndGearFling View Post
As many hp's as you want. LOL......what does it say under your user name besides Scooby?
From the guy who started this thread

http://forums.nasioc.com/forums/showthread.php?t=972189
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Old 04-03-2007, 03:24 AM   #16
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Quote:
Originally Posted by WolfInSheepsCLothing View Post
i'd say low 20's, above that and the turbo won't last long..
yeah cause i was runnin 21 psi on third and 24 on 4th and 5th and guess what?? i blew the turbo kinda. rite now my turbo wont boost past 10 and when it does it drops below 0 and major power loss. but before that it was runnin like a champ. i hit 260whp and 280 tqe w/o meth or alk inj so to put it on safe grounds go under 21. now im getting a evo3 16g im still waiting for to come. good luck
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Old 04-03-2007, 05:18 AM   #17
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Quote:
Originally Posted by prometheum View Post
weld the wastegate shut and tell us; i'd say about 50 psi
... I'd like to see someone try that just to see what they'd run. Their engine would probably blow up before making it down the track once.. You never know though..i've seen stock Civic engines take huge shots of Nitrous and still pull a few times before dying.
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