Questions about STS
Why not just go buy the right size t from lowes or home depot and just tie it into the brake booster vac line? It makes for a smaller vac hose off the BOV. My hose from my BOV was always cracking and spliting. It makes less hose to have to buy if it does it to you too. Other than that I have no idea which one to t into on the throttle body, honestly I haven't even heard of anybody doing that. But, I have now.
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From: Baltimore, MD
Why not just go buy the right size t from lowes or home depot and just tie it into the brake booster vac line? It makes for a smaller vac hose off the BOV. My hose from my BOV was always cracking and spliting. It makes less hose to have to buy if it does it to you too. Other than that I have no idea which one to t into on the throttle body, honestly I haven't even heard of anybody doing that. But, I have now.
Hmmm, one problem is you should not have any lines running off the throttle body into the valve covers or whatever that do not have check valves on them.
With a turbo or any boosted application the TB goes from having vacuum to having boost. If any hoses are connected directly to the motor like in an NA application you will now send the boost to the TB into the motor WHICH IS BAD.
That is a whole different problem though. Any line off the TB or intake will provide the correct info for a BOV. But you cannot have a line from the TB to the valve cover without having a check valve on a boosted motor or else you will be sending air from the turbo into the crankcase of the motor. The Brake booster must have a check valve also.
Hope that helps you understand.
PS. and SCH all I see is a red x
With a turbo or any boosted application the TB goes from having vacuum to having boost. If any hoses are connected directly to the motor like in an NA application you will now send the boost to the TB into the motor WHICH IS BAD.
That is a whole different problem though. Any line off the TB or intake will provide the correct info for a BOV. But you cannot have a line from the TB to the valve cover without having a check valve on a boosted motor or else you will be sending air from the turbo into the crankcase of the motor. The Brake booster must have a check valve also.
Hope that helps you understand.
PS. and SCH all I see is a red x
Joined: Jun 2004
Posts: 1,501
Likes: 7
From: Ft. Irwin, California (But Virginia is home)
Hmmm, one problem is you should not have any lines running off the throttle body into the valve covers or whatever that do not have check valves on them.
With a turbo or any boosted application the TB goes from having vacuum to having boost. If any hoses are connected directly to the motor like in an NA application you will now send the boost to the TB into the motor WHICH IS BAD.
That is a whole different problem though. Any line off the TB or intake will provide the correct info for a BOV. But you cannot have a line from the TB to the valve cover without having a check valve on a boosted motor or else you will be sending air from the turbo into the crankcase of the motor. The Brake booster must have a check valve also.
Hope that helps you understand.
PS. and SCH all I see is a red x
With a turbo or any boosted application the TB goes from having vacuum to having boost. If any hoses are connected directly to the motor like in an NA application you will now send the boost to the TB into the motor WHICH IS BAD.
That is a whole different problem though. Any line off the TB or intake will provide the correct info for a BOV. But you cannot have a line from the TB to the valve cover without having a check valve on a boosted motor or else you will be sending air from the turbo into the crankcase of the motor. The Brake booster must have a check valve also.
Hope that helps you understand.
PS. and SCH all I see is a red x
Think on a stock throttle body the vacuum port might have a cap on it.You do bring up a good point about not boosting the crankcase though! Either way....I'm good
BTW....don't know why you can't see the pic. It's an imageshack hosting....... Must have been my router sucking out cuz now I see it. Yeah wastegate, bov, FPR and boost gage need to see the complete spectrum. On the passenger side of your TB there should be an outlet that is pluged or has a check valve inline.
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From: Baltimore, MD
well, my tb isnt stock, it is a bbk 80mm. thanks alot for all the info. where can i pick up a check valve from? and when i got everything hooked up, how do i know if everything is running right?
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