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38mm WG...need help on BOV

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Old Mar 17, 2008 | 07:04 AM
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Default 38mm WG...need help on BOV

Hey have a 38mm tial WG searched that that would be fine for me (or at least i interperated it as it would be...) anyways have a TC76 on a 346ci with 317 heads on a stock cam. was reading that i would need a 50mm BOV....going to try and explain it the way im reading it, for low boost numbers you need to order a larger one to allow it to bleed off more air quickly, and when running bigger boost you need a smaller one, am i right on that?

have a .6 baro spring on the WG but dont know what spring size to get on the BOV, i know you do it off based on intake vacuum....but i dont know what that is on a stock car.

help me out, i'm pretty sure i'm screwing up alot of information
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Old Mar 17, 2008 | 09:46 AM
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You need a bigger Waste Gate. I have the same 38mm tial and have boost creep bad by atleast 3 psi. It wont controll the boost at high levels. I also have a GTS 76 turbo.
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Old Mar 17, 2008 | 11:12 AM
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damn

the joy of custom turboing

going to have to sell that and all the other stuff i got for it and upgrade to a larger one

but for the bov? what spring would i need for that?
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Old Mar 17, 2008 | 06:18 PM
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ok well i have the 38 up for sale right now, but i still havnt gotten my orignal question answer, what spring for the BOV with a stock cam?
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Old Mar 17, 2008 | 09:27 PM
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More boost - less gate
Less boost - more gate

If you are looking at the Tial 50 - I would go with the 7psi spring, you can order it with the gate or afterwards...I usually go heavier (11psi) and it works fine, also it is easier to hear it surge once then leak for months...
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Old Mar 20, 2008 | 07:47 PM
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Originally Posted by bawb4787
LS1 F body turbo kit. This is a stage 2 turbo kit with inter cooler tial 44mm b o v
waste gate injectors headers up pipe down pipe 62mm turbo makes 502whp at 9.5 psi of boost e boost 2 boost controller and mutch more i only recommend this for a standard transmition we have went thru 4 4L60e transmitions and a couple of turbo 400s the motor finally gave out at 130,000 so i decided to sell this turbo kit and put a used motor in the car and sell it, this turbo kit was purchased for 6,000 has about 15,000 mi on it,this comes with a water methonal kit also. contact @ bawb4787@hotmail.com or 479-806-3007

so....


is this a sale pitch?
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Old Mar 20, 2008 | 08:37 PM
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you want the 11 psi spring in the bov. tial suggest the 11 psi spring for engines with vacum around 19-21 psi , which a ls1 is.


You already know you need the 44 gate.


Good luck, Chris
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Old Mar 20, 2008 | 08:43 PM
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thank you very much sir!
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Old Mar 20, 2008 | 09:23 PM
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If it has a cam in the engine it will not see 19-21 inches of vaccume. I usually go with a smaller psi spring in the bov.
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Old Mar 20, 2008 | 09:25 PM
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nope stock cam
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