Vortec bypass valve.
- Thread starter Ty 1885
- Start date
Tooky
Serious about performance
Re: Vortec bypass valve.
Why would you want a supercharger bypass on your turbo intake? I would get rid of it for the sake of simplicity.
I dont think it would make a difference to your idle, the MAP sensor will measure the amount of air pressure reaching past the throttle body, that's what really counts..
Why would you want a supercharger bypass on your turbo intake? I would get rid of it for the sake of simplicity.
I dont think it would make a difference to your idle, the MAP sensor will measure the amount of air pressure reaching past the throttle body, that's what really counts..
ghettosled
SYTY SUPERSTORE
Re: Vortec bypass valve.
you need to tighten the set screw or make sure your vacuum line is connected to manifold vacuum without any leaks. The valve is obviously not seating properly.
As for it causing a rich condition, it will not matter. Sounds like maybe you tapped into the vacuum line for the FPR and it is now loose or cracked. That would cause a rich condition and your BOV to leak.
you need to tighten the set screw or make sure your vacuum line is connected to manifold vacuum without any leaks. The valve is obviously not seating properly.
As for it causing a rich condition, it will not matter. Sounds like maybe you tapped into the vacuum line for the FPR and it is now loose or cracked. That would cause a rich condition and your BOV to leak.
midnightbluS10
Banned
Re: Vortec bypass valve.
According to Vortech, they're not just for superchargers.http://www.vortechsuperchargers.com/download.php?dir=pdf&file=2007Catalog_pg44.pdf
Tooky said:
According to Vortech, they're not just for superchargers.http://www.vortechsuperchargers.com/download.php?dir=pdf&file=2007Catalog_pg44.pdf
Tooky
Serious about performance
Re: Vortec bypass valve.
I am 90% sure he was running a Vortech bypass in the vid. Vortech's site says it's for controlling the charge under deceleration. Listen to the last second of the vid, right when he lets off the gas, you can hear an insane rush of air - the bypass opening (it really was loud and obnoxious driving around with this bypass sound all the time).
Because the blower is belt driven, it keeps pumping air even when the engine doesn't need it. So thats the purpose of a bypass in my understanding.
What similar situation would a turbo need this? When you let off the gas the exhaust flow drops and the turbine doesnt continue to spin like a blower. Maybe there's something I'm missing? Admittedly I have never ran a bypass, blowoff, popoff, etc. on any of my cars.
I read the page and I still don't get the purpose on a turbocharged engine. Check out this video I took riding in my buddy's 9 second 427SBF Vortech supercharged Mustang: http://www.youtube.com/watch?v=3nc0LlF9S94midnightbluS10 said:
I am 90% sure he was running a Vortech bypass in the vid. Vortech's site says it's for controlling the charge under deceleration. Listen to the last second of the vid, right when he lets off the gas, you can hear an insane rush of air - the bypass opening (it really was loud and obnoxious driving around with this bypass sound all the time).
Because the blower is belt driven, it keeps pumping air even when the engine doesn't need it. So thats the purpose of a bypass in my understanding.
What similar situation would a turbo need this? When you let off the gas the exhaust flow drops and the turbine doesnt continue to spin like a blower. Maybe there's something I'm missing? Admittedly I have never ran a bypass, blowoff, popoff, etc. on any of my cars.
ghettosled
SYTY SUPERSTORE
Re: Vortec bypass valve.
where do you think the compressed air goes when you let off the throttle, and the TB is closed? backwards through the inlet of the turbo. This creates harmonics, etc. In reality it is not really required on smaller turbo automatic applications with low boost, but becomes essential on large turbo drag applications with heavy rotating parts and high boost. Manual turbo cars use them to help maintain a more consistant boost level bewtween shifts, instead of making the turbo surge and fight air coming in and being pushed back out through the same oriface.
where do you think the compressed air goes when you let off the throttle, and the TB is closed? backwards through the inlet of the turbo. This creates harmonics, etc. In reality it is not really required on smaller turbo automatic applications with low boost, but becomes essential on large turbo drag applications with heavy rotating parts and high boost. Manual turbo cars use them to help maintain a more consistant boost level bewtween shifts, instead of making the turbo surge and fight air coming in and being pushed back out through the same oriface.
canadian
sy in progress
Re: Vortec bypass valve.
But the turbine does continue to spin after you let off the gas. As soon as those throttle blades close, that air has to go somewhere, and the only place is back at the compressor side of the turbo and tries to spin the impeller in the opposite direction.
Having an outlet for this air reversion is an attempt to prolong the life of the turbo. There should be a number of threads here on this topic.
Tooky said:
But the turbine does continue to spin after you let off the gas. As soon as those throttle blades close, that air has to go somewhere, and the only place is back at the compressor side of the turbo and tries to spin the impeller in the opposite direction.
Having an outlet for this air reversion is an attempt to prolong the life of the turbo. There should be a number of threads here on this topic.
Tooky
Serious about performance
Re: Vortec bypass valve.
OK I meant when you let off the turbo doesnt spin "like a blower" - i.e. doesn't continue to spin at high speed with direct connection to engine RPM. Obviously it still spins while it decelerates and we all hear that horse-sneezing "PFFFTTT" flutter noise when we let off our SyTys.
But whats the difference between a blowoff valve and a bypass valve then?
OK I meant when you let off the turbo doesnt spin "like a blower" - i.e. doesn't continue to spin at high speed with direct connection to engine RPM. Obviously it still spins while it decelerates and we all hear that horse-sneezing "PFFFTTT" flutter noise when we let off our SyTys.
But whats the difference between a blowoff valve and a bypass valve then?
Ty 1885
Member
Re: Vortec bypass valve.
I have it plum in lower front of the upper intake it works good i was just wondering. Also something new today. I was crussing and it started to idle at 2,000 rpm. Nothing lose, i backed idle srew out and nothing ,also diconected idle air valve and nothing no check light.
Any idies ?? Thanks
I have it plum in lower front of the upper intake it works good i was just wondering. Also something new today. I was crussing and it started to idle at 2,000 rpm. Nothing lose, i backed idle srew out and nothing ,also diconected idle air valve and nothing no check light.
Any idies ?? Thanks
ghettosled
SYTY SUPERSTORE
Re: Vortec bypass valve.
you have a vacuum leak.
In regards to the blowoff valve vs popoff valve etc..
Blowoff valves are typically used to release air when the throttle is closed. As soon as the motor has stored enough boost in your charge pipe to overcome the spring rate, and the motor switches to vacuum the stored boost pressure will be released. Cars with map sensors do not need to re-circulate the air back into the intake. Cars with mass air sensors need to plumb the spent air back into the system.
A pop off valve, surge valve etc is basically a valve that whenever the engine sees a certain amount of boost pressure it opens. Problem is that the turbo keeps spinning, and the RPM of the turbine keeps climbing en route to overspeeding the turbo.
The difference is that most blow off valves have a line to the top that under throttle/boost will keep the valve closed no matter what the boost.
will Manifold pressure forces the valve closed (the vacuum line going to the top), while vacuum will pull it open thus releasing the air. The spring inside will determine at what psi
you have a vacuum leak.
In regards to the blowoff valve vs popoff valve etc..
Blowoff valves are typically used to release air when the throttle is closed. As soon as the motor has stored enough boost in your charge pipe to overcome the spring rate, and the motor switches to vacuum the stored boost pressure will be released. Cars with map sensors do not need to re-circulate the air back into the intake. Cars with mass air sensors need to plumb the spent air back into the system.
A pop off valve, surge valve etc is basically a valve that whenever the engine sees a certain amount of boost pressure it opens. Problem is that the turbo keeps spinning, and the RPM of the turbine keeps climbing en route to overspeeding the turbo.
The difference is that most blow off valves have a line to the top that under throttle/boost will keep the valve closed no matter what the boost.
will Manifold pressure forces the valve closed (the vacuum line going to the top), while vacuum will pull it open thus releasing the air. The spring inside will determine at what psi