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That's the project I'm working with now. Bi-charging the sr. A couple of people did it (not including high end shops) with the sc14 supercharger which is the one I'm using. Another cool thing about the benz and toyota sc's is that there pullie threads are the same as out crank pullie thread. It took me a while to figure out a system that would work, but Im 95% sure it will work. The system plan Im working on uses an extra TB that is opened by a second adjustable turbo actuator. That way I set the actuator to open when the turbo overpowers the sc. what I meen is: say the sc boost 7psi, then at 5krpm (bigass turbo) when the turbo surpasses 7psi the tb for the second air filter opens to feed air to the turbo. Think of a "Y" two pipes go into 1. that 1 pipe is the turbo intake the other 2 parts of the Y are 1: air filter pipe for the turbo and 2: compressed pipe from the sc. The second tb is on the turbo airfilter pipe. It stays closed, as the supercharger feeds the turbo then opens when 7+ psi is reached since the turbo needs more cfm then the sc can push. This is the method I am going with. Its a different then the bicharged cars Ive seen since most use one way valves and trap doors, but I could not find a one way valve big enough to save my life. I think my plan will work wonderfully though. You would have the sc manualy adjustable but could also use a boost controller to regulate how long you want the sc to power the turbo, and if you dont want the sc to free spin after the turbo kicks in, you can use a simple msd box that cuts of power to the electro magnet, at what ever rpm the turbo reaches full boost. Let me know if any of you guys dont get my description and I will make a drawing on what I meen.
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