BOV/Wastegate vacuum lines
BOV/Wastegate vacuum lines Just finished up my on3 kit and had a question on how to run the lines. I have the bov tee'd into the brake booster but what about the wastegate? No controller so the top port is just vented but on the side port can i just tee into the old evap line behind the TB on the drivers side? Just replace the hard line with a different line? Any help would be appreciated!
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From: Old Bridge, NJ/Corpus Christi, TX
You could always run a vacuum block off the back of the intake and have a few ports on it for various things. BOV, WG, boost referenced fuel pressure regulator, etc...
I'm with this guy. I swear I keep on adding and tee-ing into vacuum sources weekly. A block would have been way easier and cleaner. BOV, Wastegate, 3 Bar map, Hobbs switch, and boost gauge are all additional sources that I added. So, you can imagine that it get to be a mess pretty quickly.
Launching!
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From: Davisburg, MI
If you connect the wastgate right before the the throttle body and the BOV after it, when the throttle snaps closed the wastgate pressure will spike and open wide at the same time the BOV reads low pressure and also opens. If they are both after, the wastgate will be closed and the turbo will be trying to make boost through an open BOV for an instant. Lots of unnecessary turbine RPMs.
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From: Norn Iron
Launching!
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From: Davisburg, MI
I've read so many different opinions on where to reference the WG and boost referenced FPR. Some say before throttle body and some say after throttle body. I've decided to reference my wastegate before the throttle body from the compressor housing. But am still unsure about where to reference the FPR. Some say before the TB so the FPR only sees boost and no vacuum, while others say to reference it after the throttle body. Where are you guys referencing your FPR?
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From: Norn Iron
I've read so many different opinions on where to reference the WG and boost referenced FPR. Some say before throttle body and some say after throttle body. I've decided to reference my wastegate before the throttle body from the compressor housing. But am still unsure about where to reference the FPR. Some say before the TB so the FPR only sees boost and no vacuum, while others say to reference it after the throttle body. Where are you guys referencing your FPR?
FPR should be between the TB and intake valves. ie inlet manifold.
There is no sensible reason to take it from anywhere else.
Almost all boost control setups will tell you to take the pressure line from the compressor cover. Not all, but most and generally it is convenient anyway.
You should never take FPR, MAP sensor etc from the same line as the w/g pipe.
Truth.
There is no difference in opinion.
FPR should be between the TB and intake valves. ie inlet manifold.
There is no sensible reason to take it from anywhere else.
Almost all boost control setups will tell you to take the pressure line from the compressor cover. Not all, but most and generally it is convenient anyway.
You should never take FPR, MAP sensor etc from the same line as the w/g pipe.
FPR should be between the TB and intake valves. ie inlet manifold.
There is no sensible reason to take it from anywhere else.
Almost all boost control setups will tell you to take the pressure line from the compressor cover. Not all, but most and generally it is convenient anyway.
You should never take FPR, MAP sensor etc from the same line as the w/g pipe.
