Just about to finish up 7M GTE rebuild with some mods. After market intercooler and pipes, the "3000" replacement pipe does not have bung for hose that goes to the vacuum switched 1/2" hose that I don't know the function of. Does someone have a diagram of all the vacuum lines and what is needed and what can be safely deleted? Thanks. (FWI, I am using the replacement turbo elbow and full 3" exhaust from Driftmotion)
What vacuum mods to make?
- Thread starter rustfarmer
- Start date
Perhaps I was less than clear, since I don't know what the hose in question is for. It is large (1/2' id) and runs from the 3000 pipe through a vacuum operated valve then to the accordion hose. I don't see it in the routing diagrams you so kindly provided.
That's the factory bypass valve, or BOV. It will have two big hoses, and You need it, or an aftermarket alternative.
This thing, two big hoses, 1 small vacuum line:
This thing, two big hoses, 1 small vacuum line:
Thanks to all for the help. I do have after market BOV as part of the intercooler upgrade, so stocker will be deleted.
Be aware that if you vent the aftermarket blowoff valve to the atmosphere(rather than recirculating it), you will
generally encounter stumbling and stalling issues after letting off boost. That is, if you're on the stock MAF.
generally encounter stumbling and stalling issues after letting off boost. That is, if you're on the stock MAF.
supraguy@aol;2059828 said:
Only if his VTV by the throttle body isn't working correctly. The throttle shouldn't slam closed but most overlook it.
Even with an operating throttle dash pot, it will still stumble and falter. It's not a matter of the throttle closing too quickly it's a matter of the air that has been drawn threw the AFM has already been accounted for, and fuel has been added for that air. A vented BOV allows this metered air to escape but the fuel is still added.
This results in a ton of fuel being thrown into the motor with almost zero air to burn it.
This results in a ton of fuel being thrown into the motor with almost zero air to burn it.
Thanks for this info. Makes good sense, so if running a modified intercooler pipe and the fancy (and wrong, apparently) BOV, is there a simple work around? If I want to use the new BOV is there a easy way to dump the air back into the intake?Nosechunks;2060401 said:
im sure you could attach the hose to BOV and recirculate it back into the intake. if you like that chu chuuu sound you can use high flow air filter, with even better aluminium intake pipe that will resonate the sound and you'll be able to hear it pretty loud. some bows even have option recirculated or vented in atmosphere.
Is your car a stick? It's not likely to stall between gears because the speed of the car and the solid connection of the clutch keeps it turning.
However on an automatic or in slower speed maneuvers it can release enough air to cause stumbling/stalling. If the motor stalls you use power steering.
However on an automatic or in slower speed maneuvers it can release enough air to cause stumbling/stalling. If the motor stalls you use power steering.