Using the Flappy Valve soleniod to controll boost
12-19-2004, 02:18 AM
#1
Drifting
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Using the Flappy Valve soleniod to controll boost
The flappy valve soleniod, little thing on the driver's side TB cover with vac lines and electrical connectors coming off it, can be used to open and close the Magnusson by-pass valve and therefore controll boost.
To accomplish this you will need to put a check valve, such as comes with the BEGI 2025 in the line that comes on the by-pass valve. This is necessary because boost will close the by-pass no matter what. Atmospreric will close it too, but just a little bit of vacuum can keep it open. You'll also need some sort of electronic controll of the soleniod such as an RPM switch, TPS signal, or just a plain old switch. The vac line in to the soleniod will need to go to the TB and out will be teed into the existing line to the by-pass on the vacuum side of the check valve.
The uses of doing such could be: having something like valet mode, limiting boost below a certian rpm, whatever, you name it, mainly just something simple, fun and inexpensive to discuss.
Enjoy,
Andy K
To accomplish this you will need to put a check valve, such as comes with the BEGI 2025 in the line that comes on the by-pass valve. This is necessary because boost will close the by-pass no matter what. Atmospreric will close it too, but just a little bit of vacuum can keep it open. You'll also need some sort of electronic controll of the soleniod such as an RPM switch, TPS signal, or just a plain old switch. The vac line in to the soleniod will need to go to the TB and out will be teed into the existing line to the by-pass on the vacuum side of the check valve.
The uses of doing such could be: having something like valet mode, limiting boost below a certian rpm, whatever, you name it, mainly just something simple, fun and inexpensive to discuss.
Enjoy,
Andy K
Last edited by GoRideSno; 12-19-2004 at 02:53 AM.
12-19-2004, 06:54 AM
#2
Rennlist Member
Hi Andy,
With the EPROM Emulator I am developing, you would be able to control the flappy direct from the LH, and re-program at what load/rpm is is activated.
With the EPROM Emulator I am developing, you would be able to control the flappy direct from the LH, and re-program at what load/rpm is is activated.
12-19-2004, 08:57 PM
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Three Wheelin'
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The SMT6 has the capability to activate a switch at a user-configurable rpm/temperature/throttle position/manifold pressure.
hmm... cut boost when temps get high? (easy)
limit boost to X psi? (probably not as easy)
hmm... cut boost when temps get high? (easy)
limit boost to X psi? (probably not as easy)
...im set.